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Novel identity-based privacy enhanced mail forwarding system

A forwarding system, mail technology, applied in transmission systems, digital transmission systems, electrical components, etc.

Inactive Publication Date: 2010-05-19
COMMUNICATION UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the way of decrypting with A's private key and then encrypting with B's public key is an invalid implementation

Method used

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  • Novel identity-based privacy enhanced mail forwarding system
  • Novel identity-based privacy enhanced mail forwarding system
  • Novel identity-based privacy enhanced mail forwarding system

Examples

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] see figure 1 , the present embodiment provides an identity-based secure email forwarding method, the method comprising the following steps:

[0035] Step 101: Select system parameters, the specific selected system parameters are as follows:

[0036] First, the key generation center, namely PKG, selects the working group G as follows 1 and G 2 , G 1 some generator P of , and defined from G 1 ×G 1 to G 2 Bilinear maps on ê:

[0037] (1) Choose a large prime number p satisfying p=2 mod 3 and p=6q-1, for a certain prime number q. Let E be given by the equation y 2 =x 3 +1 for elliptic curves defined over a finite field GL(p), let P be an element of order q in E / GL(p), let the group G 1 = , that is, the additive group on ...

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Abstract

The invention discloses a novel identity-based privacy enhanced mail forwarding system, which belongs to the field of communication. A method comprises the following steps of: selecting system parameters according to system security requirements, and generating a system master private key (namely the private key of a private key generation center PKG); receiving a user registration application by the PKG, and generating a private key for a user according to an e-mail address selected by the user; generating a first-stage encrypted e-mail according to the e-mail address of the user; generating a re-encrypted private key according to the system parameters; generating a second-stage encrypted e-mail according to the first-stage encrypted e-mail and the re-encrypted private key, and forwarding the second-stage encrypted e-mail; and decrypting the first-stage or the second-stage encrypted e-mail according to the private key of the user. The novel identity-based privacy enhanced mail forwarding system is realized on the basis of the bilinear pairing defined on an elliptic curve, uses a novel random filling mode to ensure the non-scalability of a cipher text, and enhances the security of the first-stage and the second-stage encrypted e-mails.

Description

technical field [0001] The present invention generally relates to encryption, re-encryption, forwarding and decryption for mail systems, and more specifically relates to the use of an identity-based proxy re-encryption system as a cryptographic tool to realize forwarding of confidential mail. [0002] Terminology Explanation [0003] The meaning of confidential mail: the content of the mail is encrypted. [0004] Identity-based meaning: the encryption key is the target email address itself (and because of this, the system does not require a public key infrastructure, PKI), but the decryption key is created by a trusted private key generator (PKG) for each Generated by registered users. [0005] The meaning of confidential email forwarding: It was originally a confidential email sent to user A (such as a manager). Due to some reasons (such as business trips, etc.), A did not care about decrypting and processing this email; but before that, A opened the automatic forwarding se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/58H04L29/06
Inventor 潘耘潘平周菁周世正梁辉汪立宝
Owner COMMUNICATION UNIVERSITY OF CHINA
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