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Learn about modern cryptography by solving a series of interactive puzzles and challenges. Get to know the ciphers and protocols that secure the digital world by breaking them.
Announcement CryptoHack. CryptoHack chat is based on Discord, which has worked well for us so far. Discord is free, has a great UI, and has enabled the creation of the awesome CryptoHacker bot which links CryptoHack accounts to Discord profiles. Jan 5, 2022.
This page offers a convenient way for you to interact with the "JSON in JSON" challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish. For more information see the FAQ.
This page offers a convenient way for you to interact with the "Digestive" challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish. For more information see the FAQ. Your aim is to recover the FLAG value.
Once you have have it, submit it on the Crypto On The Web challenge page. Source import jwt # note this is the PyJWT module, not python-jwt # Key generated using: openssl genrsa -out rsa-or-hmac-private.pem 2048 with open('challenge_files/rsa-or-hmac-private.pem', 'rb') as f: PRIVATE_KEY = f.read() with open('challenge_files/rsa-or-hmac-public ...
Hex Encoder/Decoder. This is a convenient encoder designed for ASCII -> Hex translations.It won't work for decoding hex to byte streams and will just show [unprintable] in that case.
Help. This page offers a convenient way for you to interact with the "RSA or HMAC? Part 2" challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish. For more information see the FAQ. Your aim is to recover the FLAG value.
Data Encryption Standard was the forerunner to AES, and is still widely used in some slow-moving areas like the Payment Card Industry. This challenge demonstrates a strange weakness of DES which a secure block cipher should not have.
This page offers a convenient way for you to interact with the "JWT Secrets" challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish. For more information see the FAQ. Your aim is to recover the FLAG value.
A mode of operation describes how to use a cipher like AES on longer messages. All modes have serious weaknesses when used incorrectly. The challenges in this category take you to a different section of the website where you can interact with APIs and exploit those weaknesses.