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Practical Cryptography
Although most people claim they're not familar with
cryptography, they are often familar with the concept of ciphers, whether or not they are actually concious of it. Recent films such as
The Da Vin...
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Practical Cryptography
The Autokey cipher uses the following tableau (the 'tabula recta') to encipher the plaintext:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Practical Cryptography
Cryptanalysis
This section documents the ways in which many cryptographic ciphers can be cryptanalysed and broken. The easiest ciphers to break are the ones which have existed for a long time. With th...
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Practical Cryptography
For a recap of how the Caesar cipher works, see here
Being arguably the simplest keyed cipher, the Caesar cipher can be broken in milliseconds using automated tools.
Since there are only 25 possible...
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Practical Cryptography
To encipher your own messages in python, you can use the pycipher module. To install it, use
pip install pycipher. To encipher messages with the Affine cipher (or another cipher, see here for documen...
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Practical Cryptography
For a recap of how the Vigenere Cipher works, see here
The Vigenere cipher was though to be completely unbreakable for hundreds of years, and indeed, if very long keys are used the vigenere cipher can...