Crypto - Encryption Tools

Michael Kokoschka

Contains adsIn-app purchases

About this app

Crypto - The unique cryptography app with numerous & useful features
Suitable for learning, testing & applying.

Explore cryptography - the magic behind cryptocurrencies like Bitcoin or Ethereum. Now with Blockchain related features. More coming soon!

Features
• Encryption
• Hashing
• Encoding/Decoding
• Mathematical functions
• Secure Communication Tools (Certificates & Key Exchange)
• Analysis
• Tools

This makes Crypto unique:
• Beautiful & modern Material Design
• Useful implemented features
• Info pages for a lot of functions (implementation details etc.)
• Sharing/Copy-pasting your texts & content made very easy & powerful
• Save frequently used functions as favorites
• Powerful Secure Communication Tools as an approach to provide secure encryption as a security add-on for every untrusted messaging or email service

Tools
Ciphers
• Caesar
• Vigenère
• Skytale
• Enigma
• DES
• 3DES
• AES
• Blowfish
• Twofish
• Serpent
• IDEA
• RC6
• RC4
• Salsa20
• ChaCha

Cryptanalysis
• Frequency Analysis
• Caesar Brute Force
• Factorization

Mathematics
• Primality Test (Fermat, Miller Rabin)
• Greatest Common Divisor & Multiplicative Inverse in a Field
• Euler's Totient Function
• Prime Search
• Find Divisors

Asymmetric Methods
• RSA
• Diffie Hellman
• DSA
• El Gamal

Hash & HMAC
• MD2
• MD4
• MD5
• RIPEMD
• SHA-1
• SHA-2
• SHA-3
• Tiger
• Whirlpool
• Gost3411

MAC - Message Authentication Code
• Skein
• Poly1305
• CMAC

KDF - Key Derivation Function
• HKDF
• Scrypt

Encoding/Decoding
• Base64
• Base58
• Hexadecimal
• Binary
• URL
• Morse Code

Other tools
• PEM Decoder
• RSA Modulus Converter
• QR Code Generator
• QR Code Decoder
• Advanced Base64 Encoding/Decoding
• Bitcoin Address Generator

Secure Communication Tools
• Certificates (RSA)
• Key Exchange (RSA Public Key Block Cipher Encryption)
• Signature (RSA/SHA256)
• Text Encryption (AES-256/GCM)
• File Encryption (AES-256/GCM)


Feedback
If you have any problems, suggestions or questions, please email to [e-mail]

Ratings and reviews

It is the best suite of cryptographic tools you can find on Google Play Store. It does far more than I need it for (mostly encrypting files to do encrypted backups on my file server). But it has some issues. For example rotating the screen on some pages rotates the app and then it crashes immediately, no matter how many times you do it, it ALWAYS crashes. Also in the send feedback page, if I press the send feedback button nothing happens.

Nice app, couple of really useful features. Would be good if the quick share feature supported Signal, but no big deal. And unless I'm missing something, it doesn't seem to support PGP Keys, just X509. One thing that was a bit annoying is that I upgraded to Pro, the payment went through, but isn't reflected in the app, but maybe it just takes some time to go through.

5 out of 5 Worth every penny! I recommend this to anyone who is looking for a decent app with cryptographic functions and learning. Things I want to see added. 1. Full GPG integration/Multiple keys etc. 2. Ability to encrypt multiple files. 3. Option to save key is not available when you type it in only when random is pressed. 4. Option to create more certificates. Look forward to seeing further updates. Thank you for creating such a useful application.

What’s new

v5.6.1
• Technical maintenance
• Bugfixes