The book is accompanied with a FREE COMPANION CD containing both commented and uncommented versions of the source code examples presented throughout the book. In addition to the book source code, the CD also contains a copy of the author-developed Hacker Code Library v1.0. The Hacker Code Library includes multiple attack classes and functions that can be utilized to quickly create security programs and scripts. These classes and functions simplify exploit and vulnerability tool development to an extent never before possible with publicly available software.Learn to quickly create security tools that ease the burden of software testing and network administrationFind out about key security issues regarding vulnerabilities, exploits, programming flaws, and secure code developmentDiscover the differences in numerous types of web-based attacks so that developers can create proper quality assurance testing procedures and toolsLearn to automate quality assurance, management, and development tasks and procedures for testing systems and applicationsLearn to write complex Snort rules based solely upon traffic generated by network tools and exploits
System administrators running Windows, Unix, and Linux networks manage anywhere from 1 to thousands of operating systems (Windows, Unix, etc.), Applications (Exchange, Snort, IIS, etc.), and hardware devices (firewalls, routers, etc.) that generate incredibly long and detailed log files of all activity on the particular application or device. This book will teach administrators how to use Microsoft's Log Parser to data mine all of the information available within these countless logs. The book teaches readers how all queries within Log Parser work (for example: a Log Parser query to an Exchange log may provide information on the origin of spam, viruses, etc.). Also, Log Parser is completely scriptable and customizable so the book will provide the reader with hundreds of original, working scripts that will automate these tasks and provide formatted charts and reports detailing the results of the queries.Written by Microsoft's sole developer of Log Parser, this is the first book available on the powerful yet completely undocumented product that ships with Microsoft's IIS, Windows Advanced Server 2003, and is available as a free download from the Microsoft Web siteThis book and accompanying scripts will save system administrators countless hours by scripting and automating the most common to the most complex log analysis tasks
Wireless technology is a new and rapidly growing field of concentration for network engineers and administrators. Innovative technology is now making the communication between computers a cordless affair. Wireless devices and networks are vulnerable to additional security risks because of their presence in the mobile environment.
Hack Proofing Your Wireless Network is the only book written specifically for architects, engineers, and administrators responsible for securing their wireless networks. From making sense of the various acronyms (WAP, WEP, SSL, PKE, PKI, SSL, SSH, IPSEC) to the implementation of security policies, plans, and recovery protocols, this book will help users secure their wireless network before its security is compromised. The only way to stop a hacker is to think like one...this book details the multiple ways a hacker can attack a wireless network - and then provides users with the knowledge they need to prevent said attacks.Uses forensic-based analysis to give the reader an insight into the mind of a hackerWith the growth of wireless networks architects, engineers and administrators will need this bookUp to the minute Web based support at email@example.com
Is hacking something left up to the bad guys? Certainly not! Hacking For Dummies, 5th Edition is a fully updated resource that guides you in hacking your system to better protect your network against malicious attacks. This revised text helps you recognize any vulnerabilities that are lurking in your system, allowing you to fix them before someone else finds them. Penetration testing, vulnerability assessments, security best practices, and other aspects of ethical hacking are covered in this book, including Windows 10 hacks, Linux hacks, web application hacks, database hacks, VoIP hacks, and mobile computing hacks. Additionally, you have access to free testing tools and an appendix detailing valuable tools and resources.
Ethical hacking entails thinking like the bad guys to identify any vulnerabilities that they might find in your system—and fixing them before they do. Also called penetration testing, ethical hacking is essential to keeping your system, and all of its data, secure. Understanding how to perform effective ethical hacking can improve the safety of your network.Defend your system—and all of the data it holds—against the latest Windows 10 and Linux hacks Develop an effective ethical hacking plan that keeps your system safe Protect your web applications, databases, laptops, and smartphones by going beyond simple hacking strategies Leverage the latest testing tools and techniques when using ethical hacking to keep your system secure
Hacking For Dummies, 5th Edition is a fully updated resource that guides you in hacking your own system to protect it—and it will become your go-to reference when ethical hacking is on your to-do list.
IT professionals who want to run secure networks, or build secure software, need to know about the methods of hackers. The second edition of the best seller Hack Proofing Your Network, teaches about those topics, including: · The Politics, Laws of Security, Classes of Attack, Methodology, Diffing, Decrypting, Brute Force, Unexpected Input, Buffer Overrun, Sniffing, Session Hijacking, Spoofing, Server Holes, Client Holes, Trojans and Viruses, Reporting Security Problems, Choosing Secure Systems The central idea of this book is that it's better for you to find the holes in your network than it is for someone else to find them, someone that would use them against you. The complete, authoritative guide to protecting your Windows 2000 Network.Updated coverage of an international bestseller and series flagshipCovers more methods of attack and hacker secretsInterest in topic continues to grow - network architects, engineers and administrators continue to scramble for security booksWritten by the former security manager for Sybase and an expert witness in the Kevin Mitnick trialsA great addition to the bestselling "Hack Proofing..." seriesWindows 2000 sales have surpassed those of Windows NTCritical topic. The security of an organization's data and communications is crucial to its survival and these topics are notoriously difficult to graspUnrivalled web support at firstname.lastname@example.org
After reading this book, you should be able to use these tools to do some testing and even working on penetration projects. You just need to remember not to use these techniques in a production environment without having a formal approval.
Protect your Web applications from malicious attacks by mastering the weapons and thought processes of today's hacker. Written by recognized security practitioners and thought leaders, Hacking Exposed Web Applications, Third Edition is fully updated to cover new infiltration methods and countermeasures. Find out how to reinforce authentication and authorization, plug holes in Firefox and IE, reinforce against injection attacks, and secure Web 2.0 features. Integrating security into the Web development lifecycle (SDL) and into the broader enterprise information security program is also covered in this comprehensive resource.Get full details on the hacker's footprinting, scanning, and profiling tools, including SHODAN, Maltego, and OWASP DirBuster See new exploits of popular platforms like Sun Java System Web Server and Oracle WebLogic in operation Understand how attackers defeat commonly used Web authentication technologies See how real-world session attacks leak sensitive data and how to fortify your applications Learn the most devastating methods used in today's hacks, including SQL injection, XSS, XSRF, phishing, and XML injection techniques Find and fix vulnerabilities in ASP.NET, PHP, and J2EE execution environments Safety deploy XML, social networking, cloud computing, and Web 2.0 services Defend against RIA, Ajax, UGC, and browser-based, client-side exploits Implement scalable threat modeling, code review, application scanning, fuzzing, and security testing procedures
Web applications are the front door to most organizations, exposing them to attacks that may disclose personal information, execute fraudulent transactions, or compromise ordinary users. This practical book has been completely updated and revised to discuss the latest step-by-step techniques for attacking and defending the range of ever-evolving web applications. You'll explore the various new technologies employed in web applications that have appeared since the first edition and review the new attack techniques that have been developed, particularly in relation to the client side.Reveals how to overcome the new technologies and techniques aimed at defending web applications against attacks that have appeared since the previous edition Discusses new remoting frameworks, HTML5, cross-domain integration techniques, UI redress, framebusting, HTTP parameter pollution, hybrid file attacks, and more Features a companion web site hosted by the authors that allows readers to try out the attacks described, gives answers to the questions that are posed at the end of each chapter, and provides a summarized methodology and checklist of tasks
Focusing on the areas of web application security where things have changed in recent years, this book is the most current resource on the critical topic of discovering, exploiting, and preventing web application security flaws.
Also available as a set with, CEHv8: Certified Hacker Version 8 Study Guide, Ethical Hacking and Web Hacking Set, 9781119072171.
“Bruce Schneier’s amazing book is the best overview of privacy and security ever written.”—Clay Shirky
Your cell phone provider tracks your location and knows who’s with you. Your online and in-store purchasing patterns are recorded, and reveal if you're unemployed, sick, or pregnant. Your e-mails and texts expose your intimate and casual friends. Google knows what you’re thinking because it saves your private searches. Facebook can determine your sexual orientation without you ever mentioning it.
The powers that surveil us do more than simply store this information. Corporations use surveillance to manipulate not only the news articles and advertisements we each see, but also the prices we’re offered. Governments use surveillance to discriminate, censor, chill free speech, and put people in danger worldwide. And both sides share this information with each other or, even worse, lose it to cybercriminals in huge data breaches.
Much of this is voluntary: we cooperate with corporate surveillance because it promises us convenience, and we submit to government surveillance because it promises us protection. The result is a mass surveillance society of our own making. But have we given up more than we’ve gained? In Data and Goliath, security expert Bruce Schneier offers another path, one that values both security and privacy. He brings his bestseller up-to-date with a new preface covering the latest developments, and then shows us exactly what we can do to reform government surveillance programs, shake up surveillance-based business models, and protect our individual privacy. You'll never look at your phone, your computer, your credit cards, or even your car in the same way again.
The CISSP certification is the most prestigious, globally-recognized, vendor neutral exam for information security professionals. Over 100,000 professionals are certified worldwide, with many more joining their ranks. This new third edition is aligned to cover all of the material in the most current version of the exam’s Common Body of Knowledge. All domains are covered as completely and concisely as possible, giving users the best possible chance of acing the exam.Completely updated for the most current version of the exam’s Common Body of KnowledgeProvides the only guide you need for last-minute studyingAnswers the toughest questions and highlights core topicsStreamlined for maximum efficiency of study, making it ideal for professionals updating their certification or for those taking the test for the first time
According to Einstein, “There are two things which have no end, one is UNIVERSE and the second is Human's STUPIDITY”. So, don't be fooled, never click on any file sent through chatting. And keep one thing in mind that "Hacking can only be done through your mistakes”.
This book is written for both technical and non-technical persons, and layman terminologies are used, so as anyone can easily understand. This will NOT teach you to be a hacker, but will teach you what hackers do, how do they think, and how they perform hacking. If you know their intention, you can prevent yourself from being hacked. Please keep in mind that you can’t prevent fully but can minimize the chances of being a victim.
It will also discuss about the most used hacking methodologies, what leakage in system let it gets performed and how can you prevent yourself from it. Play safe, Stay safe!
I'm sure this book is going to help you in your day to day cyber life. Please do read, and leave a lovely comment.
Classification of Hackers
Why do they hack?
Phases of Hacking
Methods of Hacking and Preventive Actions
Denial of Service (Dos Attack)
XSS (Cross site Scripting)
Cross Site Request Forgery, CSRF
Man In The Middle, MITM
Bonus: Google Hacking Tools that assist Hackers
Prevention from Hackers
Laws and Liabilities in India
Aadhaar data breach – January
Facebook data breach – March
Facebook data breach – Sep
Yahoo! Data breaches – August
LinkedIn breach – May
Systems security managers, you'll find tools and a framework for structured thinking about what can go wrong. Software developers, you'll appreciate the jargon-free and accessible introduction to this essential skill. Security professionals, you'll learn to discern changing threats and discover the easiest ways to adopt a structured approach to threat modeling.Provides a unique how-to for security and software developers who need to design secure products and systems and test their designs Explains how to threat model and explores various threat modeling approaches, such as asset-centric, attacker-centric and software-centric Provides effective approaches and techniques that have been proven at Microsoft and elsewhere Offers actionable how-to advice not tied to any specific software, operating system, or programming language Authored by a Microsoft professional who is one of the most prominent threat modeling experts in the world
As more software is delivered on the Internet or operates on Internet-connected devices, the design of secure software is absolutely critical. Make sure you're ready with Threat Modeling: Designing for Security.
Everything is a computer. Ovens are computers that make things hot; refrigerators are computers that keep things cold. These computers—from home thermostats to chemical plants—are all online. The Internet, once a virtual abstraction, can now sense and touch the physical world.
As we open our lives to this future, often called the Internet of Things, we are beginning to see its enormous potential in ideas like driverless cars, smart cities, and personal agents equipped with their own behavioral algorithms. But every knife cuts two ways.
All computers can be hacked. And Internet-connected computers are the most vulnerable. Forget data theft: cutting-edge digital attackers can now crash your car, your pacemaker, and the nation’s power grid. In Click Here to Kill Everybody, renowned expert and best-selling author Bruce Schneier examines the hidden risks of this new reality.
After exploring the full implications of a world populated by hyperconnected devices, Schneier reveals the hidden web of technical, political, and market forces that underpin the pervasive insecurities of today. He then offers common-sense choices for companies, governments, and individuals that can allow us to enjoy the benefits of this omnipotent age without falling prey to its vulnerabilities.
From principles for a more resilient Internet of Things, to a recipe for sane government regulation and oversight, to a better way to understand a truly new environment, Schneier’s vision is required reading for anyone invested in human flourishing.
Once you're familiar with the basic components of the software, you'll learn how to use Kali through the phases of the penetration testing lifecycle; one major tool from each phase is explained. The book culminates with a chapter on reporting that will provide examples of documents used prior to, during and after the pen test.
This guide will benefit information security professionals of all levels, hackers, systems administrators, network administrators, and beginning and intermediate professional pen testers, as well as students majoring in information security.Provides detailed explanations of the complete penetration testing lifecycleComplete linkage of the Kali information, resources and distribution downloadsHands-on exercises reinforce topics
CASP: CompTIA Advanced Security Practitioner Study Guide: CAS-002 is the updated edition of the bestselling book covering the CASP certification exam. CompTIA approved, this guide covers all of the CASP exam objectives with clear, concise, thorough information on crucial security topics. With practical examples and insights drawn from real-world experience, the book is a comprehensive study resource with authoritative coverage of key concepts. Exam highlights, end-of-chapter reviews, and a searchable glossary help with information retention, and cutting-edge exam prep software offers electronic flashcards and hundreds of bonus practice questions. Additional hands-on lab exercises mimic the exam's focus on practical application, providing extra opportunities for readers to test their skills.
CASP is a DoD 8570.1-recognized security certification that validates the skillset of advanced-level IT security professionals. The exam measures the technical knowledge and skills required to conceptualize, design, and engineer secure solutions across complex enterprise environments, as well as the ability to think critically and apply good judgment across a broad spectrum of security disciplines. This study guide helps CASP candidates thoroughly prepare for the exam, providing the opportunity to:Master risk management and incident response Sharpen research and analysis skills Integrate computing with communications and business Review enterprise management and technical component integration
Experts predict a 45-fold increase in digital data by 2020, with one-third of all information passing through the cloud. Data has never been so vulnerable, and the demand for certified security professionals is increasing quickly. The CASP proves an IT professional's skills, but getting that certification requires thorough preparation. This CASP study guide provides the information and practice that eliminate surprises on exam day.
Also available as a set, Security Practitoner & Crypotography Set, 9781119071549 with Applied Cryptography: Protocols, Algorithms, and Source Code in C, 2nd Edition.
Each chapter contains hands-on examples and exercises that are designed to teach learners how to interpret results and utilize those results in later phases. Tool coverage includes: Backtrack Linux, Google reconnaissance, MetaGooFil, dig, Nmap, Nessus, Metasploit, Fast Track Autopwn, Netcat, and Hacker Defender rootkit. This is complemented by PowerPoint slides for use in class.
This book is an ideal resource for security consultants, beginning InfoSec professionals, and students.Each chapter contains hands-on examples and exercises that are designed to teach you how to interpret the results and utilize those results in later phases.Written by an author who works in the field as a Penetration Tester and who teaches Offensive Security, Penetration Testing, and Ethical Hacking, and Exploitation classes at Dakota State University.Utilizes the Kali Linux distribution and focuses on the seminal tools required to complete a penetration test.
Social Engineering: The Science of Human Hacking reveals the craftier side of the hacker’s repertoire—why hack into something when you could just ask for access? Undetectable by firewalls and antivirus software, social engineering relies on human fault to gain access to sensitive spaces; in this book, renowned expert Christopher Hadnagy explains the most commonly-used techniques that fool even the most robust security personnel, and shows you how these techniques have been used in the past. The way that we make decisions as humans affects everything from our emotions to our security. Hackers, since the beginning of time, have figured out ways to exploit that decision making process and get you to take an action not in your best interest. This new Second Edition has been updated with the most current methods used by sharing stories, examples, and scientific study behind how those decisions are exploited.
Networks and systems can be hacked, but they can also be protected; when the “system” in question is a human being, there is no software to fall back on, no hardware upgrade, no code that can lock information down indefinitely. Human nature and emotion is the secret weapon of the malicious social engineering, and this book shows you how to recognize, predict, and prevent this type of manipulation by taking you inside the social engineer’s bag of tricks.Examine the most common social engineering tricks used to gain access Discover which popular techniques generally don’t work in the real world Examine how our understanding of the science behind emotions and decisions can be used by social engineers Learn how social engineering factors into some of the biggest recent headlines Learn how to use these skills as a professional social engineer and secure your company Adopt effective counter-measures to keep hackers at bay
By working from the social engineer’s playbook, you gain the advantage of foresight that can help you protect yourself and others from even their best efforts. Social Engineering gives you the inside information you need to mount an unshakeable defense.
IT security can be a complex topic, especially for those new to the field of IT. This full-color book, with a focus on the Microsoft Technology Associate (MTA) program, offers a clear and easy-to-understand approach to Windows security risks and attacks for newcomers to the world of IT. By paring down to just the essentials, beginners gain a solid foundation of security concepts upon which more advanced topics and technologies can be built.
This straightforward guide begins each chapter by laying out a list of topics to be discussed, followed by a concise discussion of the core networking skills you need to have to gain a strong handle on the subject matter. Chapters conclude with review questions and suggested labs so you can measure your level of understanding of the chapter's content.Serves as an ideal resource for gaining a solid understanding of fundamental security concepts and skills Offers a straightforward and direct approach to security basics and covers anti-malware software products, firewalls, network topologies and devices, network ports, and more Reviews all the topics you need to know for taking the MTA 98-367 exam Provides an overview of security components, looks at securing access with permissions, addresses audit policies and network auditing, and examines protecting clients and servers
If you're new to IT and interested in entering the IT workforce, then Microsoft Windows Security Essentials is essential reading.
CompTIA Security+ Study Guide, Seventh Edition offers invaluable preparation for Exam SY0-501. Written by an expert author team, this book covers 100% of the exam objectives with clear, concise explanation. You'll learn how to handle threats, attacks, and vulnerabilities using industry-standard tools and technologies, while understanding the role of architecture and design. From everyday tasks like identity and access management to complex topics like risk management and cryptography, this study guide helps you consolidate your knowledge base in preparation for the Security+ exam. Practical examples illustrate how these processes play out in real-world scenarios, allowing you to immediately translate essential concepts to on-the-job application. You also gain access to the Sybex online learning environment, which features a robust toolkit for more thorough prep: flashcards, glossary of key terms, practice questions, and a pre-assessment exam equip you with everything you need to enter the exam confident in your skill set.
This study guide is approved and endorsed by CompTIA, and has been fully updated to align with the latest version of the exam.Master essential security technologies, tools, and tasks Understand how Security+ concepts are applied in the real world Study on the go with electronic flashcards and more Test your knowledge along the way with hundreds of practice questions
To an employer, the CompTIA Security+ certification proves that you have the knowledge base and skill set to secure applications, devices, and networks; analyze and respond to threats; participate in risk mitigation, and so much more. As data threats loom larger every day, the demand for qualified security professionals will only continue to grow. If you're ready to take the first step toward a rewarding career, CompTIA Security+ Study Guide, Seventh Edition is the ideal companion for thorough exam preparation.
Cryptography is vital to keeping information safe, in an era when the formula to do so becomes more and more challenging. Written by a team of world-renowned cryptography experts, this essential guide is the definitive introduction to all major areas of cryptography: message security, key negotiation, and key management. You'll learn how to think like a cryptographer. You'll discover techniques for building cryptography into products from the start and you'll examine the many technical changes in the field.
After a basic overview of cryptography and what it means today, this indispensable resource covers such topics as block ciphers, block modes, hash functions, encryption modes, message authentication codes, implementation issues, negotiation protocols, and more. Helpful examples and hands-on exercises enhance your understanding of the multi-faceted field of cryptography.An author team of internationally recognized cryptography experts updates you on vital topics in the field of cryptography Shows you how to build cryptography into products from the start Examines updates and changes to cryptography Includes coverage on key servers, message security, authentication codes, new standards, block ciphers, message authentication codes, and more
Cryptography Engineering gets you up to speed in the ever-evolving field of cryptography.
The book lays a heavy emphasis on open source tools and step-by-step examples and includes information about Android applications needed for forensic investigations. It is organized into seven chapters that cover the history of the Android platform and its internationalization; the Android Open Source Project (AOSP) and the Android Market; a brief tutorial on Linux and Android forensics; and how to create an Ubuntu-based virtual machine (VM). The book also considers a wide array of Android-supported hardware and device types, the various Android releases, the Android software development kit (SDK), the Davlik VM, key components of Android security, and other fundamental concepts related to Android forensics, such as the Android debug bridge and the USB debugging setting. In addition, it analyzes how data are stored on an Android device and describes strategies and specific utilities that a forensic analyst or security engineer can use to examine an acquired Android device.
Core Android developers and manufacturers, app developers, corporate security officers, and anyone with limited forensic experience will find this book extremely useful. It will also appeal to computer forensic and incident response professionals, including commercial/private sector contractors, consultants, and those in federal government.Named a 2011 Best Digital Forensics Book by InfoSec ReviewsAbility to forensically acquire Android devices using the techniques outlined in the bookDetailed information about Android applications needed for forensics investigationsImportant information about SQLite, a file based structured data storage relevant for both Android and many other platforms.
If you are a working ethical hacker who is looking to expand the offensive skillset with a thorough understanding of Kali Linux, then this is the book for you. Prior knowledge about Linux operating systems and the BASH terminal emulator along with Windows desktop and command line would be highly beneficial.What You Will LearnSet up Kali Linux for pen testingMap and enumerate your Windows networkExploit several common Windows network vulnerabilitiesAttack and defeat password schemes on WindowsDebug and reverse-engineer Windows programsRecover lost files, investigate successful hacks and discover hidden data in innocent-looking filesCatch and hold admin rights on the network, and maintain backdoors on the network after your initial testing is doneIn Detail
Microsoft Windows is one of the two most common OS and managing its security has spawned the discipline of IT security. Kali Linux is the premier platform for testing and maintaining Windows security. Kali is built on the Debian distribution of Linux and shares the legendary stability of that OS. This lets you focus on using the network penetration, password cracking, forensics tools and not the OS.
This book has the most advanced tools and techniques to reproduce the methods used by sophisticated hackers to make you an expert in Kali Linux penetration testing. First, you are introduced to Kali's top ten tools and other useful reporting tools. Then, you will find your way around your target network and determine known vulnerabilities to be able to exploit a system remotely. Next, you will prove that the vulnerabilities you have found are real and exploitable. You will learn to use tools in seven categories of exploitation tools. Further, you perform web access exploits using tools like websploit and more. Security is only as strong as the weakest link in the chain. Passwords are often that weak link. Thus, you learn about password attacks that can be used in concert with other approaches to break into and own a network. Moreover, you come to terms with network sniffing, which helps you understand which users are using services you can exploit, and IP spoofing, which can be used to poison a system's DNS cache. Once you gain access to a machine or network, maintaining access is important.
Thus, you not only learn penetrating in the machine you also learn Windows privilege's escalations. With easy to follow step-by-step instructions and support images, you will be able to quickly pen test your system and network.Style and approach
This book is a hands-on guide for Kali Linux pen testing. This book will provide all the practical knowledge needed to test your network's security using a proven hacker's methodology. The book uses easy-to-understand yet professional language for explaining concepts.
The new Second Edition of this book provides you with completely up-to-date real-world examples and all the key technologies used in digital forensics, as well as new coverage of network intrusion response, how hard drives are organized, and electronic discovery. You'll also learn how to incorporate quality assurance into an investigation, how to prioritize evidence items to examine (triage), case processing, and what goes into making an expert witness.
The Second Edition also features expanded resources and references, including online resources that keep you current, sample legal documents, and suggested further reading.Learn what Digital Forensics entailsBuild a toolkit and prepare an investigative planUnderstand the common artifacts to look for in an examSecond Edition features all-new coverage of hard drives, triage, network intrusion response, and electronic discovery; as well as updated case studies, expert interviews, and expanded resources and references
The CompTIA Cybersecurity Analyst+ (CySA+) Study Guide provides 100% coverage of all exam objectives for the new CySA+ certification. The CySA+ certification validates a candidate's skills to configure and use threat detection tools, perform data analysis, identify vulnerabilities with a goal of securing and protecting organizations systems. Focus your review for the CySA+ with Sybex and benefit from real-world examples drawn from experts, hands-on labs, insight on how to create your own cybersecurity toolkit, and end-of-chapter review questions help you gauge your understanding each step of the way. You also gain access to the Sybex interactive learning environment that includes electronic flashcards, a searchable glossary, and hundreds of bonus practice questions.
This study guide provides the guidance and knowledge you need to demonstrate your skill set in cybersecurity. Key exam topics include:Threat management Vulnerability management Cyber incident response Security architecture and toolsets