Ameli, Reza

Present Cipher Encryption Core

## 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.


<h2 id="about-present-block-cipher">About Present Block Cipher</h2>
<p>Present is a lightweight block cipher designed for hardware constrained applications such as RFID tags and Smart Cards.<br />
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.<br />
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.<br />
This project entails an encryption-only implementation of Present cipher with key size equal to 80 bits.</p>


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Present Cipher Encryption Core

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About Present Block Cipher