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Method for mutual authentication of user identities based on elliptic curve passwords

An elliptic curve and user identity technology, which is applied in the field of security and privacy protection in wireless communication, can solve problems such as loss of system security, and achieve the effect of accelerating authentication speed, reducing communication overhead and calculation overhead, and reducing the number of verifications

Active Publication Date: 2015-05-20
ZHEJIANG UNIV
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Problems solved by technology

However, all user private keys are uniformly generated by the KGC. If the KGC is no longer trusted or the private key of the KGC is stolen by an attacker, the security of the entire system will be lost.

Method used

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  • Method for mutual authentication of user identities based on elliptic curve passwords
  • Method for mutual authentication of user identities based on elliptic curve passwords
  • Method for mutual authentication of user identities based on elliptic curve passwords

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0047] The method of the present invention includes system initialization, user registration stage and user identity mutual authentication stage, such as figure 1 shown.

[0048] This example is implemented through the following steps:

[0049] Step 1. System initialization. First, the CA (certification center) selects a 160-bit elliptic curve E(GF(p)) based on the prime number field GF(p) recommended by the SEC 2 standard. The elliptic curve equation is:

[0050] the y 2 =x 3 +ax+b(modp), a, b∈GF(p), and (4a 3 +27b 2 )modp≠0

[0051] Elliptic curve domain parameter is T=(p,a,b,G,n,h), CA randomly selects an integer s CA as its private key, and s CA ∈[2,n-2], by calculating P CA =s CA G obtains its public key;

[0052] Step 2, user registration phase, first users Alice and Bob generate their public / private key pair s by registering ...

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Abstract

The invention relates to a method for mutual authentication of user identities based on elliptic curve passwords. The characteristics of storage capability, calculation capability and limited bandwidth of an Ad Hoc network are considered, and a self-authentication public key system and the intractability of an elliptic curve discrete logarithm problem are utilized, so as to reduce the interaction times of the user identity authentication process, and accelerate the authentication speed. The method comprises the following steps of system initializing, user registering, and mutual authentication of the user identities. The method has the advantages that while the mutual authentication of the user identities is guaranteed, the function of session key negotiation is realized, the storage expense, communication expense and calculation expense are all less, the replay attack, man-in-the-middle attack, counterfeiting and tampering attack, and key disclosure counterfeiting attack can be resisted, a generated one-time session key has the advancing security and backward security, and the security is higher.

Description

technical field [0001] The invention belongs to the technical field of security and privacy protection in wireless communication, and in particular relates to a user identity mutual authentication method based on an elliptic curve code. Background technique [0002] As a special mobile ad hoc network, Ad Hoc network has a wide range of applications, especially suitable for tactical communication, emergency communication, temporary communication and other occasions. Mobile Ad Hoc networks do not require any infrastructure, have the characteristics of dynamic changes in network topology, limited storage capacity, computing power and energy, limited bandwidth, and poor network security, making Ad Hoc networks vulnerable to various attacks. Security is one of the key issues to be solved, and identity authentication is the first security barrier in the network system. For the Ad Hoc network, each node needs to be able to confirm the identity of the node communicating with it. If ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/30
Inventor 陈惠芳谢磊葛琳琳
Owner ZHEJIANG UNIV
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