Optical security method for user password protection

Abstract

An optical security method for protecting user password belongs to the field of information security. The method is characterized in that a newly set password is coded as follows: a new password P set by a user and a key K randomly generated are transformed to obtain a parameter for controlling OFS, then the parameter controls the OFS to generate a fractal pattern F, and the F and the K are stored in a storage media; the verified password is verified as follows: firstly, the verified password P' and the key K are transformed to generate a parameter for controlling the OFS, then the parameter controls the OFS to generate a fractal pattern F', the F' and the fractal pattern F stored in the storage media are compared, if the F' is in accordance with the F, then the user password passes the verification, or the user password is an illegal password. The method has the advantages that the application range of the optical security method is expanded to the user password protection, and the optical security method is safer than the existing cryptology method realized by computers or DSP and can be applicable to a plurality of situations using password verification.

Description

Optical security method for protecting user password Technical field The invention belongs to the field of information security, and relates to an optical security method for protecting user passwords. Background technique Currently, known password protection technologies rely on cryptographic algorithms such as DataEncryption Standard (DES) and RSA to encrypt user passwords into cipher text using computers or digital signal processors (DSP) and other equipment to prevent the real plain text password from being cracked. However, there are many methods to attack these encryption algorithms, posing a threat to user passwords. At the same time, known optical information security technologies such as dual random phase encoding technology, security systems based on joint transform correlators, authentication systems based on iterative algorithms, and pure phase encoding technologies are only suitable for protecting image information. Summary of the invention The technical problem...

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Problems solved by technology

The technical problem to be solved by the present invention is to provide an optical security method for protecting user passwords, and solve the defect that existing optical security means are not suitable for protecting user passwords

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