ECC/RSA encryption/decryption coprocessor

Abstract

The invention relates to an ECC\RSA encryption and decryption coprocessor which includes a command input device, an ECC\RSA master controller, an ECC slave controller, an operation controller and a basic operation controller, wherein, the command input device converts external commands and is respectively connected with the ECC\RSA master controller, the ECC slave controller and the operation controller; after switching the corresponding ECC\RSA operation, the ECC\RSA master controller are respectively connected with the ECC slave controller and the operation controller so as to control the ECC slave controller to complete the calculation of modular exponentiation, modular multiplication and point multiplication as well as control the operation controller to complete the modular multiplication; the operation controller is connected with basic operation controller and the basic operation controller completes the modular multiplication calculation and plus-minus calculation; therefore, ECC\RSA encryption and decryption calculation can be realized by using a shift register, a multiplier and an adder at the same time, thus reducing the register and a combinational logic circuit as well as effectively reducing chip area.

Description

technical field [0001] The present invention relates to an encryption processor, in particular to a processor that realizes ECC\RSA encryption and decryption operations at the same time. Background technique [0002] RSA public key cryptography is a widely used public key data encryption and decryption algorithm, which can resist all cryptographic attacks known so far. The security of the RSA algorithm is based on the difficulty of factorizing large prime numbers in number theory. With the rapid development of computer processing capabilities and networks, the weakness of the RSA public key cryptosystem, which has a large number of public keys (generally more than 1024 bits), is gradually exposed. Elliptic Curve Cryptography (ECC), whose security is based on the difficulty of solving the discrete logarithm problem ECDLP of the additive group on the elliptic curve, ECC has more advantages than the RSA system. Due to its higher security per bit, it has a fast computing speed...

AI Technical Summary

Problems solved by technology

For devices with low clock frequency such as smart IC cards, there are many interactions between software and hardware, resulting in slow operation speed.

However, in some high-speed implementation designs, the area of ​​the chip is relatively large and the cost is relatively high.

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