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Cracking SHA1-Hashed Passwords Level 2

by Lehrstuhl für Kryptologie u. IT-Sicherheit, Ruhr-Universität Bochum, published on 4/4/2011

Password-based authentication means that a user sends a plaintext password to a server, and the server calculates the hash value of the received password and compares it with a stored hash value. Goal of this challenge is to reveal the plaintext password given its SHA1 hash value. There is some information known about the original password.