Crypto Helper
4.3star
385 reviews
50K+
Downloads
Everyone
info
About this app
Extremely fast and incredibly secure encryption tool that can be used as a second layer over any existing or future application. The simple design does not save any sensitive data that could later be used against your security. Once you quit the app, all secret data is erased.
Current features:
Using an algorithm similar to Vigenère and one time pad ciphers
Strong key derivation leveraging cryptographically secure random salts
Frequency analysis page finds how many of each ASCII character are found in a given string of text
Optional noise injecting feature injects random data into the cipher and increase entropy
Hexadecimal encoded bytes support any UTF-8 characters (accents, Cyrillic, etc.)
Random key generator
Current features:
Using an algorithm similar to Vigenère and one time pad ciphers
Strong key derivation leveraging cryptographically secure random salts
Frequency analysis page finds how many of each ASCII character are found in a given string of text
Optional noise injecting feature injects random data into the cipher and increase entropy
Hexadecimal encoded bytes support any UTF-8 characters (accents, Cyrillic, etc.)
Random key generator
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews
4.4
370 reviews
A Google user
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October 17, 2019
This app reportedly uses some (proprietary) algorithm related to Vigenére (broken) and OTP. Due to the key length, this cannot be a true OTP. This is some stream cipher with a very short (24b!) nonce, which makes the cipher vulnerable to xor attack if you are unlucky. The cipher is malleable. TL;DR: Do not use this app for serious cryptography. It is some unreviewed proprietary algorithm with too short nonces.
59 people found this review helpful
Dalton H
October 17, 2019
The final encryption is done via OTP, however the system uses a key stretcher in order to solve an issue of using weak and repeated keys. A secure key to begin with would be ideal but most users wont be able to do that. Hence all keys are stretched and then fed to OTP. Next patch will use an AES 256 layer and a public key negotiation protocol.
Anton