# Xorcsm - Charalambides - Branches

2008

Label: Wholly Other - wholly other #13 • Format: CD Album, Reissue • Country: US • Genre: Rock • Style: Folk Rock, Art Rock

In cryptographythe simple XOR cipher is a type of additive cipher[1] an encryption algorithm that operates according to the principles:.

This operation is sometimes called modulus 2 addition or subtraction, which is identical. To decrypt the output, merely reapplying the XOR function with the key will remove the cipher. For example, the string "Wiki" in 8-bit **Xorcsm - Charalambides - Branches ** can be encrypted with the repeating key as follows:. The XOR operator is extremely common as a component in more complex ciphers.

By itself, using a constant repeating key, a simple XOR cipher can trivially be broken using frequency analysis. If the content of any message can be guessed or otherwise known then the key can be revealed. Its primary merit is that it is simple to implement, and that the XOR operation is computationally inexpensive.

A simple repeating XOR i. The XOR cipher is often used in computer malware to make reverse engineering more difficult. If the key is random and is at least as long as the message, the XOR cipher is much more secure than when there Xorcsm - Charalambides - Branches key repetition within a message. With a key that is truly randomthe result is a one-time padwhich is unbreakable in theory.

Xorcsm - Charalambides - Branches is also trivial to flip arbitrary bits in the decrypted plaintext by manipulating the ciphertext. This is called malleability. Example using the Python programming language. From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.

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