Apparatus and method for generating secret key for id-based encryption system and recording medium having program recorded thereon for causing computer to execute the method

一种密钥生成装置、密钥生成的技术，应用在安全通信的公共密钥、传输系统、数字传输系统等方向，能够解决找不到方法等问题

Active Publication Date: 2013-12-18
SAMSUNG SDS CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, it is only theoretically possible to implement ID-based encryption through trapdoor discrete logarithm (TDL) technology, but no practical method can be found.

Method used

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  • Apparatus and method for generating secret key for id-based encryption system and recording medium having program recorded thereon for causing computer to execute the method
  • Apparatus and method for generating secret key for id-based encryption system and recording medium having program recorded thereon for causing computer to execute the method
  • Apparatus and method for generating secret key for id-based encryption system and recording medium having program recorded thereon for causing computer to execute the method

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Embodiment Construction

[0025] Hereinafter, preferred embodiments of a key generating apparatus and method thereof for use in an ID-based encryption system according to the present invention will be described in detail with reference to the accompanying drawings.

[0026] figure 1 It is a block diagram showing the configuration of the key generation device 100 according to the present invention. refer to figure 1 , the key generation device 100 has an ID conversion unit 110 and a key calculation unit 120 . just, as figure 2 As shown, the ID conversion unit 110 can be independent from the key calculation unit 120 and be configured in a dedicated client or server 200 .

[0027] When a user ID is input, the ID conversion unit 110 outputs a specific element value of a discrete logarithm cyclic group (Discrete logarithm cyclic group) corresponding to the input user ID. refer to image 3 , in order to make a one-to-one correspondence between the user ID (S310) as an input value and a specific element...

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Abstract

A private key generation apparatus for generating a private key corresponding to a user ID using the user ID as a public key is disclosed. When a user ID is input, an ID conversion unit outputs a specific element value of a discrete logarithm cyclic group having a one-to-one correspondence relationship with an input user ID. A private key calculation unit calculates a discrete logarithm result value based on the output specific element value of the discrete logarithm cyclic group and calculates a private key having a one-to-one correspondence relationship with the user ID. According to the present invention, it is possible to concretely propose a method of calculating a secret key, capable of guaranteeing a one-to-one correspondence relationship between the ID and the private key by applying a method of calculating a discrete logarithm using the pre-computation table in an ID-based encryption system.

Description

technical field [0001] The present invention relates to a key generation device and its method for an ID-based encryption system, and a recording medium recorded with a program for executing the method on a computer, in particular to a discrete pair method using a pre-calculated table. A key generation device for an ID-based encryption system of a number calculation method, a method thereof, and a recording medium recorded with a program for executing the method on a computer. Background technique [0002] Recently, due to the development of computer technology and the rapid expansion of communication networks, the security of computer-related resources and transmitted information has been raised as a focus of attention. As a countermeasure capable of solving these problems, encryption-based systems are being utilized. The encryption system that has contributed the most so far is the public key encryption system. However, in this conventional public key system, it is necess...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/3006H04L9/3066H04L9/08H04L9/14H04L9/30H04L9/0816
Inventor 李仙荣权奇相尹爻珍
Owner SAMSUNG SDS CO LTD
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