High speed encryption and decryption USB bridging chip and chip high speed encryption and decryption method

Abstract

The invention discloses a USB bridge chip for encrypting and decrypting at high speed and a high-speed encryption and decryption method. The bridge chip comprises a first USB interface (103), a second USB interface (104), an encryption algorithm module (102), an internal storage (107), a CPU (105), a data buffer and a data buffering controller (101). As an encryption and decryption bridge device,the invention is applied in the connection between a host computer (20) and a mobile storage device (30) and is used for switching over the mapping relationship between the logical addresses of the first USB interface, the encryption algorithm module and the second USB interface and the physical addresses of a first data buffer area, a second buffer area and a third buffer area through the alternation between a second control bit and a third control bit in the data buffering controller in the chip; the invention leads the first data buffer area, the second buffer area and the third buffer area to work following the first USB interface, the cryptographic algorithm module and the second USB interface parallelly, and carries out data batch transferring between the host computer and the mobile storage device, thereby raising the encryption and decrypting speed of the data.

Description

Technical field [0001] The invention relates to an encryption and decryption chip and a high-speed encryption and decryption method, in particular to a high-speed encryption and decryption USB bridge chip connected between a host and a mobile storage device using a USB interface and a method for improving the chip encryption and decryption speed, belonging to the technical field of information security encryption. Background technique [0002] At present, mobile storage devices are widely used. Encrypting the data of mobile storage devices can effectively guarantee the security of digital asset information and prevent it from being obtained by illegal users. Therefore, data encryption, especially data encryption on mobile storage devices, is an important means to protect digital information security. The high-speed encryption and storage of original text data to mobile storage devices is widely used in various information security fields. [0003] At present, in order to encrypt d...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high-speed encryption and decryption USB bridge chip and a high-speed encryption and decryption method for the chip. The mobile storage devices are connected with the USB interface, and the data transmitted between the host computer and the mobile storage device can be encrypted and decrypted at high speed through the high-speed encryption and decryption USB bridge chip.

Images