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Solved Challenges

Symmetric Ciphers Round Keys 20
Misc No Leaks 100
Mathematics Quadratic Residues 25
ZKPs Proofs of Knowledge 20
ZKPs ZKP Introduction 5
Hash Functions Collider 50
Hash Functions Jack's Birthday Hash 20
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Saying Hello 20
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Misc Gotta Go Fast 40
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
General Extended GCD 20
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Greatest Common Divisor 15
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2
Symmetric Ciphers ECB Oracle 60
Crypto on the Web Secure Protocols 5
General Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General XOR Starter 10
General Encoding Challenge 40
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5

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