CryptoHack – A free, fun platform for learning cryptography
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.
CryptoHack Blog | Updates about the CryptoHack platform, …
Best practices in applied cryptography have changed drastically over the last few decades. We know that if a cryptosystem can go wrong, in practice it will go wrong. A classic example is nonce reuse, which a wide number of symmetric ciphers, signature schemes, and authentication protocols are susceptible to (see CryptoHack challenges “ProSign ...
Passwords as Keys - CryptoHack
Description. It is essential that keys in symmetric-key algorithms are random bytes, instead of passwords or other predictable data. The random bytes should be generated using a cryptographically-secure pseudorandom number generator (CSPRNG).
JWT Secrets - CryptoHack
Help. 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.
CryptoHack Blog
Best practices in applied cryptography have changed drastically over the last few decades. We know that if a cryptosystem can go wrong, in practice it will go wrong. A classic example is nonce reuse, which a wide number of symmetric ciphers, signature schemes, and authentication protocols are susceptible to (see CryptoHack challenges “ProSign ...
Modes of Operation Starter - CryptoHack
Public-Key Cryptography Elliptic Curves. Categories General Symmetric Ciphers Mathematics RSA Diffie-Hellman Elliptic Curves Hash Functions Crypto on the Web Lattices Isogenies Zero-Knowledge Proofs Miscellaneous CTF Archive. Credits Illustrations from Ouch.pics
Symmetry - CryptoHack
Description. Some block cipher modes, such as OFB, CTR, or CFB, turn a block cipher into a stream cipher. The idea behind stream ciphers is to produce a pseudorandom keystream which is then XORed with the plaintext.
RSA or HMAC? - CryptoHack
Help. This page offers a convenient way for you to interact with the "RSA or HMAC?" challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish.