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Research Article

VLSI Design of Advanced-Features AES Crypt Processor for Cryptography

Titiksha V1 Surya M2 Henry Bruno D G3
123 Electronics and communication engineering , Bannari Amman Institute of Technology, Tamil Nadu, India.

Published Online: March-April 2023

Pages: 147-155

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Abstract

Abstract: Advanced Encryption Standard (AES) is a specification for electronic data encryption. This standard has become one of the most widely used encryption method and has been implemented in both software and hardware.A high-secure symmetric cryptography algorithm, The proposed architecture includes 8-bit data path and five main blocks. We design two specified register banks, Key-Register and State-Register, for storing the plain text, keys, and intermediate data. To reduce the area, Shift-Rows is embedded inside the State- Register. To adapt the Mix-Column to 8-bit datapath, we design an optimized 8-bit block for Mix-Columns with four internal registers, which accept 8-bit and send back 8-bit. Also, shared optimized Sub-Bytes are employed for the key expansion phase and encryption phase. To optimize Sub-Bytes, we merge and simplify some parts of the Sub-Bytes. To reduce power consumption, we apply the clock gating technique to the design. This paper presents an Image Cryptography based 128-bit AES design. This Design is implemented using Verilog HDL and simulated by Modelsim 6.4 c.

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