DownloadD-crypt is an symmetrical block cipher operating on 256bit blocks with an key of the same length. The cipher takes 3 inputs: the data to encrypt, the symmetric key and a tweak consisting in a array of 16 integers representing each one of eleven possible keyaddition algorithms. Features a similar structure as AES (uses simpler versions of ShiftRows, MixColumns) and uses AES SBOX. It is an SP network. The Key Schedule is a different from AES's, however the Expansion is partially inspired in AES. The 256-bit key is turned into a 576-byte expanded key which is used in every key addition round. D-crypt performs a total of 18 rounds:
Firstly it does a SBOX round, and a XOR keyaddition with the first 32bytes of the expanded key, Secondly it does 16 rounds of MixcColums, ShiftRows, KeyAddition (this step is determined by the tweak) and SBOX, and finally, it does an final round of SBOX followed by a final round of XOR key addition, providing key whitening. Only 32byte and key supported for now
Features
- Modular
- Tweakable
- Block cipher
- 256bit key
- 256bit data
- SP network
- AES based
- Complex Key Schedule
- Key Whitening
- AES Sbox
Project Samples
