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Safe and efficient one-round tripartite key exchange method under standard model

A standard model, key exchange technology, applied in the computer field, can solve the problem of low execution efficiency of LY algorithm

Inactive Publication Date: 2015-12-02
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the execution efficiency of the LY algorithm is relatively low. How to improve the execution efficiency of the algorithm is a major problem that needs to be solved.

Method used

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  • Safe and efficient one-round tripartite key exchange method under standard model
  • Safe and efficient one-round tripartite key exchange method under standard model
  • Safe and efficient one-round tripartite key exchange method under standard model

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The present invention discloses a safe and efficient one-round tripartite key exchange method under a standard model. The method comprises a step 1 of setting a safety parameter of the multi-receiver secret key packaging input, generating a bilinear group, selecting an element from the bilinear group to generate a system parameter; a step 2 of selecting a private key of each receiver from a positive integer multiplication group according to the generated system parameter, and calculating a public key according to the selected private keys; a step 3 of each user generating a temporary public key pair and a private key pair according to the generated system parameter, and sending the temporary public key pair to other two users; a step 4 of each receiver using the own long-term and temporary private keys, and calculating a final session key according to the received temporary public key. A secret key generation algorithm of the present invention has the highest efficiency, for users, the communication security of a specific group can be guaranteed in a specific group environment, the external attack and the break of the communication activity of the specific group are prevented.

Description

technical field [0001] The invention relates to the computer field, in particular to a safe and efficient single-round tripartite key exchange method under a new standard model. Background technique [0002] One-round tripartite key exchange algorithm (One-round tripartite key exchange--ORTKE) is a cryptographic primitive that establishes a shared key for less than three users with only one round of communication. Each participant can send and only send one message at the same time during the key agreement process. As a cryptographic component, ORTKE can be expanded into a secure group (more than three parties) key exchange algorithm through certain methods. Therefore, ORTKE has a very large practical demand in related applications of multi-user confidential communication, such as confidential online video conferencing and message broadcasting. In terms of security, the single-round tripartite key exchange algorithm designed by the present invention has strong security obj...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/08
CPCH04L9/0841H04L63/061
Inventor 杨铮张岱固
Owner CHONGQING UNIV OF TECH
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