Who validate the challenge  Cryptanalysis / Service - Hash length extension attack

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AES - 4 Rounds AES - Fault attack #1 AES - Fault attack #2 AES - CBC - Bit-Flipping Attack AES - ECB AES - ECB - Copy Paste AES - Weaker variant AES-PMAC AES128 - CTR Hill Cipher Shift cipher Circular Bit Shift CISCO - Salted Password Known plaintext - XOR Code - Pseudo Random Number Generator Pixel Madness ECDHE ECDSA - Implementation error ECDSA - Introduction ELF64 - PID encryption Encoding - ASCII Encoding - Codebook Encoding - UU FEAL - Differential Cryptanalysis File - PKZIP File - Insecure storage 1 GEDEFU Hash - DCC Hash - DCC2 Hash - LM Hash - Message Digest 5 Hash - NT Hash - SHA-2 Hash - SHA-3 LFSR - Known plaintext Enigma Machine OTP - Implementation error PHP - mt_rand Discrete logarithm problem RSA - Corrupted key 1 RSA - Corrupted key 2 RSA - Corrupted key 3 RSA - Factorisation RSA - Continued fractions RSA - H-rabin RSA - Lee cooper RSA - Common modulus RSA - Multiple recipients RSA - Decipher Oracle RSA - Padding RSA - Signature Service - CBC Padding Service - Hash length extension attack Service - Timing attack Shamir Secret Sharing - Introduction Shamir Secret Sharing - Irreducible ? Shamir Secret Sharing - Reduction Shamir Secret Sharing - Traitor Side Channel - AES : CPA Side Channel - AES : first round Monoalphabetic substitution - Caesar Monoalphabetic substitution - Polybe Polyalphabetic substitution - One Time Pad Polyalphabetic substitution - Vigenère System - Android lock pattern Transposition - Rail Fence Twisted secret Initialisation Vector White-Box Cryptography

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