File encrypting device based on USB interface
A universal serial bus, encryption device technology, applied in the direction of digital data processing parts, instruments, electrical digital data processing, etc., can solve the problem of unable to meet the security level data protection requirements, unable to ensure the security of hard disk data, etc., to achieve safe use , Guaranteed uniqueness, the effect of preventing loss or theft
Inactive Publication Date: 2006-05-24
TSINGHUA UNIGROUP CO LTD
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Problems solved by technology
[0007] 1. In the data encryption method of Northwestern Polytechnical University, the key used for encryption / decryption is stored in the key management module in the encryption device. In the data encryption method of IBM, the key is generated by the identification number of the non-detachable hardware in the computer system , if the whole machine is lost or stolen, neither of these two methods can guarantee the data security in the hard disk
[0008] 2. Encrypt all the data in the computer hard disk, which cannot meet the user's protection requirements for data with different security levels
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[0022] The computer folder encryption device based on the universal serial bus interface that the present invention proposes, its structural block diagram is as follows figure 1 As shown, it includes: a universal serial bus interface chip, which is used for high-speed data transmission and communication between the host computer and the digital signal processor, and is connected with the host computer; the digital signal processor is used for The data stream is encrypted and decrypted, and is connected with the universal serial bus interface chip; the smart card chip is used for storing keys and personal information, and is connected with the digital signal processor; the encryption device driver is used for obtaining the file system pair in the host computer Computer hard disk read and write operations, convert multiple sets of 16-bit hard disk data into a set of 128-bit encryption and decryption data, control the encryption device to encrypt and decrypt the 128-bit data, and ...
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The encryption unit includes following parts: USB interface chip connected to computer host; digital signal processor (DSP) connected to USB interface chip; chip of smart card connected to DSP; drive of encryption unit is located between drive of file system in computer and hardware drive. In the invention, encryption unit for file folder, complete computer and its shortened cryptographic key are separated from computer system so as to prevent risk of information leakage caused by lost or stolen computer. Authentication is carried out for users before procedure of use in order to prevent information leakage from hardware. The invention satisfies requirement of data protection indifferent security level. Moreover, the unique sequence number of product inside chip of smart card ensures uniqueness of encryption key and encryption unit.
Description
technical field [0001] The invention relates to a folder encryption device based on a universal serial bus interface, which belongs to the technical field of computer information security. Background technique [0002] The openness, ease of use and standardization of computer software and hardware systems make computers inherently fatal security risks, making computer hard disk data easily illegally obtained, embezzled, tampered with or destroyed. [0003] The most effective way to ensure the security of computer data is to use encryption technology to encrypt data, process the original plaintext data according to a certain algorithm, make it unreadable ciphertext, and protect key data from being stolen, read, and tampered with by illegal users or destroy. [0004] Northwestern Polytechnical University disclosed a "computer hard disk data encryption method and its device" in the invention patent application with the application number 200410025825.5. This technology places...
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Inventor 菅晓翔高宏
Owner TSINGHUA UNIGROUP CO LTD