Elliptic curve cryptographic coprocessor

Abstract

The invention provides an elliptic curve cryptographic coprocessor, comprising an arithmetic controller, an arithmetic device, a parameter register and a RAM (Random-Access Memory), wherein the arithmetic controller is respectively in electrical connection with the arithmetic device, the parameter register and the RAM, and is used for elliptic curve point multiplication and generating a control signal for the arithmetic device to finish modular addition and modular multiplication on a base field; the arithmetic device is respectively in electrical connection with the parameter register and the RAM, and is used for modular addition and modular multiplication on the base field; the parameter register is used for storing parameters of an elliptic curve equation and pre-computing the parameters; and the RAM is used for receiving the data transmitted from the outside and storing the computation result, and exchanging data with the outside. The elliptic curve cryptographic coprocessor has simple interface manners; the computation speed is increased greatly by means of a state machine; the elliptic curve point multiplication process is optimized, intermediate variables are reduced, and consequently, the number of registers is reduced; and a modular addition and modular multiplication circuit on the base field is reused to the greatest extent, so that the circuit area is reduced.

Description

technical field

[0001] The invention relates to the technical field of information security, in particular to an elliptic curve cryptographic coprocessor. Background technique

[0002] A wireless sensor network (Wireless Sensor Network, WSN) is composed of a large number of cheap micro-sensors deployed in the monitoring area, and forms a multi-hop self-organizing network system through wireless communication. Its purpose is to cooperatively sense, collect and process Information about perceived objects in the network coverage area and sent to observers. WSN is usually deployed in an unmaintained and uncontrollable environment. In addition to various threats such as information leakage, information tampering, replay attacks, and denial of service faced by general wireless networks, WSN is also vulnerable to sensor nodes being attacked by attackers. Physically manipulate and obtain all the information stored in the sensor nodes, thereby controlling the threat of part of the n...

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