One-way data conversion apparatus and device authentication system

Abstract

The verifier apparatus 50 includes a random number generation unit 51 that generates a 2n-bit random number, a separator unit 52 that separates the random number into two sets of n-bit data, a data conversion module 53 that converts one set of separated data using the other set of separated data as a key, and a comparator unit 54 that judges whether the converted result matches claimant data sent back from the claimant apparatus 60. The claimant apparatus 60 includes a separator unit 61 and a data conversion module 62 that have the same functions as the separator unit 52 and the data conversion module 53 in the verifier apparatus 50. The claimant apparatus 60 generates n-bit claimant data from the 2n-bit random number generated by the verifier apparatus 50, and sends the generated claimant data to the verifier apparatus 50.

Description

[0001] This case is a divisional application of the Chinese patent application with application number 97122745.4. technical field [0002] The invention relates to a one-way data transformation device and a machine authentication system using it, in particular to a technology for authentication using long-field transmission data. Background technique [0003] In a system that communicates digitized data such as documents, sounds, images, and programs through a network, or a system that records, stores, and reads out the above-mentioned digital data, it is necessary to check in advance whether the person who intends to access the above-mentioned digital data is is the legitimate one who allows. [0004] For this reason, when accessing data to a network or a recording medium, an authentication procedure is used to demonstrate the legitimacy of the access. [0005] As the simplest authentication method, there is a method of sending ID and password from the visitor. However, ...

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Problems solved by technology

But, the circuit size of the data converter 12,21, scrambler 32, decoder 41 that these two devices are equipped with need more than 2 times at least, and this is subjected to the small-sized portable electronic equipment or portable electronic equipment that circuit scale is strictly limited. It is difficult to actually install in communication equipment, etc. that require high-speed authentication procedures, and this idea has to be abandoned.

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