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Source code


Name: present_encryptor
Created: Jan 18, 2011
Updated: Feb 18, 2011
SVN Updated: Feb 17, 2011

Other project properties

Category: Crypto core
Language: Verilog
Development status: Stable
Additional info:
WishBone Compliant: No
License: LGPL

About Present Block Cipher

Present is a lightweight block cipher designed for hardware constrained applications such as RFID tags and Smart Cards.
This cipher is a true example of SPN ciphers. The block size is 64 bits, key size can be either 80 or 128 bits and the number of rounds is 31.
The S-Box used in Present is a 4-bit to 4-bit S-Box which is invoked both in the substitution layer and in the key scheduling routine.
This project entails an encryption-only implementation of Present cipher with key size equal to 80 bits.