Construction method of certificateless public key cryptosystem

A technology of public key cryptography and construction methods, applied in the field of information security, can solve problems such as trusteeship and information leakage, achieve high security and solve security defects
CN106936584AActive Publication Date: 2017-07-07PINGDINGSHAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PINGDINGSHAN UNIVERSITY
Publication Date
2017-07-07

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Abstract

The invention discloses a construction method of a certificateless public key cryptosystem which belongs to the technical field of information security. The construction method of a certificateless public key cryptosystem comprises the following steps: S1, initializing a system; S2, picking up part of a private key; S3, generating a secret value; S4, generating a public key; S5, generating a private key; S6, performing certificateless signature; and S7, verifying. According to the invention, a certificateless signature system is adopted, when a signature verifier verifies a signature, the condition that the validity of a public key of a signer is needed to be verified in the traditional public key cryptosystem is avoided, so the method is free from a key escrow problem existing in a cryptosystem based on identity. Therefore, a security defect of the private key escrow of the identification cryptosystem can be solved and a better safety performance is realized.
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Description

technical field

[0001] The invention relates to the technical field of information security, in particular to a construction method of a certificateless public key cryptosystem. Background technique

[0002] Public key cryptography is a widely used technology for encrypting files, messages and other information sent to designated recipients. The system using this cryptographic technology needs to generate a pair of mathematically associated public key and private key for each user. The key is kept privately by the recipient.

[0003] An important security requirement in the application of public key cryptography is to ensure that the public key used exactly belongs to the designated recipient, that is, a security mechanism that binds user identification (ID) and its public key is required. In traditional public key cryptosystems, such as systems using algorithms such as RSA, DSA, and ECC, the generation of the public key has nothing to do with the user's identity, and a th...

Claims

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