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Released under 'Creative Commons v3' license Alien Cipher is an endeavour to build my own symmetric cipher.
The primary aim is to simply learn the fundamentals and finer details of cryptography in general and build working examples of my ideas in code.
The code is shared here for posterity (future folk) in the guise that it may help others also on the path to cryptography.
This code demo uses a 256bit rolling hash table (8x8bytes) at its heart to mix together pre-defined parameters in a way that allows the cipher to produce encoded output that is locked to a key of arbitrary length without padding.
...
Decrypt messages encrypted with a substitution cipher
...Ciphertext can be modified at any point of the
process.
• Easy location of corresponding characters in the ciphertext and the substituted text
by selection.
• Fast frequency analysis for single letters, bigrams, trigrams and quadgrams (more
N -grams can be made available by adding a single line of code).
• Showing the most common letters (bi-/trigrams) in the ciphertext compared to the
most common letters (bi-/trigrams) in the British English language.
• Easy assignment and change of the substitution letters...
"mASN1" - mini ASN.1 framework is a light ASN.1 framework written in C# for .NET
framework. It can be used for creating classes that model ASN.1 types and
are capable of encoding/decoding themselves to BER/DER codes. PER support is planned.