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Method of providing digital certificate functionality

A digital and functional technology, applied in the field of providing digital certificate functions, can solve the problems of requiring authentication channels, hardware operation power consumption, etc.

Inactive Publication Date: 2007-06-13
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The inventors have thus realized that known methods for providing digital proof functionality have various problems, including hardware cost, hardware operating power consumption, requiring an authentication channel, and requiring one or more CAs to be available online.

Method used

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  • Method of providing digital certificate functionality
  • Method of providing digital certificate functionality
  • Method of providing digital certificate functionality

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Embodiment Construction

[0041]The inventors envisage that it is feasible to provide digital proof functions based on polynomials. This approach is potentially cheaper to implement than the public key techniques described above, and can also offer the benefit of being more flexible than the symmetric key techniques described above which require an online server.

[0042] Broadly speaking, the present invention relates to a method for providing digital proof functionality as described in FIG. 1 . In Fig. 1 there is shown a communication network indicated generally by 10, comprising a Certification Authority (CA) 20, a first device (A) 30 and a second device (B) 40. The authority 20 and the devices 30, 40 are coupled such that they can communicate with each other. The network 10 may be implemented as a communication system, wherein a certification authority (CA) 20 is a server or a database, and the devices are user devices coupled to the server or database via the network 10 .

[0043] In a first ste...

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Abstract

There is described a method of providing certification functionality. The method involves: (a) at the authority (20), generating a secret P, applying the secret P to sign a data string (mA) on behalf of the first device (30, A), and then communicating (50) the signed string to the first device (30, A); (b) communicating (60) secret information from the authority (20) to the second device (B, 40), said secret information for verifying authenticity of the string (mA), said second device (40, B) being operable to use the secret information to generate a second key (kAB2); (c) generating a first key (kAB1) at the first device (30, A) using public information pertaining to the second device (40, B), said first key (kAB1) being susceptible to generation provided that the string (mA) is authentic; (d) applying the second key (kAB2) to protect data for communication from the second device (40, B) to the first device (30, A); and (e) at the first device (30, A), applying the first key (kAB1) to access the protected data communicated from the second device (40, B) to the first device (30, A).

Description

technical field [0001] The present invention relates to a method for providing digital certificate functionality, for example to a method for providing digital certificate functionality with implicit verification. Furthermore, the invention also relates to devices and systems arranged to carry out the method. Furthermore, the invention relates to digital certificates and associated data generated when implementing the method. Background technique [0002] Digital certificates are cryptographic entities that are useful in implementing cryptographic systems. A digital certificate is defined as a digital signature issued by a certification authority (CA) on a corresponding string or message m. By issuing such a certificate, the CA thus vouches for the authenticity of the string m. Other devices can verify the authenticity of string m by checking the signature. [0003] In general, public key technology is frequently used to implement digital certificates. In this technique...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/30H04L9/08
CPCH04L9/083H04L9/3073H04L9/3093H04L2209/603H04L9/308H04L9/3263
Inventor T·A·M·克弗纳尔G·J·施里詹
Owner KONINK PHILIPS ELECTRONICS NV