Dynamic password generating method and system

A dynamic password and generation system technology, applied in the field of information security, can solve the problem of reducing transaction security and achieve the effect of low repetition rate and high security

Active Publication Date: 2012-10-24
BANK OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the password entered by the user is the inherent password of their account, because the inherent password entered by the user must be transmitted to the server of the business center throu

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  • Dynamic password generating method and system

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Embodiment Construction

[0036] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 It is a schematic flow chart of the dynamic password generation method of the present invention. Such as figure 1 As shown, the dynamic password generation method provided by the present invention comprises:

[0038] Step A: Concatenate various dynamic heterogeneous information to form a plaintext S, digitally sign the plaintext S to obtain an encrypted byte stream S', shift and splicing S' and S, and then digitally sign to obtain an encrypted byte stream S", Repeat the above signature process until the number of digital signatures is equal to the preset number of signatures N, and the encrypted byte stream S2 is obtained;

[0039] Step B: Select a byte from the encrypted byte stream S2, convert it into a value a, and delete the byte from S2;

[0040] Step C: Execute the remainder operation: i=a% the length of the dynamic password c...

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Abstract

The invention discloses a dynamic password generating method and system. The method comprises the steps that various dynamic heterogeneous messages are spliced to form a clear text S, and the clear text S is digitally signed for N times to obtain an encrypted byte stream S2; one byte is selected from the S2 and is converted into a numerical value a; remainder operation is executed: i=a%*length of dynamic password character library; the ith character is selected from the dynamic password character library, and the position of a dynamic password is covered; and the dynamic password generating process is repeated until the length of the dynamic password meets the requirement. The system comprises a clear text splicing module, a signing module, a converting module, a dynamic password character library, a remainder module, a password splicing module and a distinguishing module. The dynamic password generating method provided by the invention integrates the advantages of a random number algorithm and a digital signature algorithm, so that the dynamic passwords obtained in the same transaction by the same operator in different time are definitely different; and the dynamic password is generated only in use, the recurrence rate is very low, and the security is higher.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a method and system for generating a dynamic password. Background technique [0002] With the popularization of Internet application services, users conduct more and more transactions on the Internet. Due to the openness, unreliability and peer-to-peer nature of the Internet, information security has become a key issue. Especially for Internet-based online banking services, information security is the most basic, critical and most in need of attention. [0003] When users use high-risk online banking services, such as transfer services and payment services, they must enter the correct password before the bank can provide services to users. Usually, the password entered by the user is the inherent password of their account, because the inherent password entered by the user must be transmitted to the server of the business center through the Internet, so entering the...

Claims

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Application Information

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IPC IPC(8): H04L9/32
Inventor 王炯王海炜潘定庄向友林启琴方晨陈丹霞
Owner BANK OF CHINA
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