Present - Block Cipher Encryption Core

Present - Block Cipher Encryption Core


Category: Crypto Core

Created: January 18, 2011

Updated: January 27, 2020

Language: Verilog

Other project properties

Development Status: Stable

WishBone compliant: No

WishBone version: n/a

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.