The Vigenère cipher is a classical cipher that shifts each plaintext character by the value of the key at the same position modulo the key-length.
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Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
I am trying to break a packet format. The packet format simply packs several files into one big file. The file contents are plain. But the index data which contain offsets, file sizes and filenames ...
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Using Chi-Square for Vigenere Cipher
I am writing a program which will use Chi-Square to determine which is the correct keyword for a ciphertext via Vigenere Cipher.
I came across a website that describes the Chi-Square statistics in a ...
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Kryptos : K1. What is the origin of the “palimpsest” keyword?
I'm studying the Kryptos sculpture with its cryptographic puzzles K1 to K4.
I understand that the keyword "palimpsest" was reverse-engineered using the tableau (and brute-force computer processing), ...
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How can I break a Vigenère cipher with partial plain text?
I have an exercise to do regarding Vigenère encryption.
I've got the cipher text: WNZTNVIEEGTJYKRRWYUELWNZTNV
and a partial plain text: ...
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Assistance Cracking Classical Cipher
Below is the cipher text I am trying to break and as you can see its rather short which is why I am having so much trouble.
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