VLSI Architecture For Cipher In 5G New Radio

A cipher is an algorithm for encrypting and decrypting data. Symmetric key encryption, also known as secret key encryption, based on the use of ciphers, which operate symmetrically. A cipher converts data by processing the original, plaintext characters (or other data) into cipher text

which should seems to be random data. Commonly, ciphers used two main types of transformation: transposition ciphers, which keep all the original bits of data in a byte but mix their order, and substitution ciphers, which replace specific data sequences with other specific data sequences.

Present ciphers

S-box also known as Substitution box it is a basic accent of symmetric key algorithms It under goes substitution process and put back a small block of bits . the input bit of the S-box by another block of bits S-box output bit. This method must be one-to-one, to ensure inverse operation(hence decryption).

P-box is also called as Permutation box. It is a permutation operation of all the bits that is ,it takes the outputs of all the S boxes of one round, undergoes permutation operation, and then ingest them into the S-boxes of the next round. The output bits of any S-box are spreaded as input bits of as many S-box. It is the main property of P-box.

Reference

http://www.ijstr.org/final-print/feb2020/Vlsi-Architecture-For-Cipher-In-5g-New-Radio.pdf