The invention relates to a password authentication method, equipment and system. The method comprises the steps that a challenge code for a user account is set based on a first graph matrix generated through a server; the challenge code is sent to the server, so that whether the challenge code smoothly exists in a password generated through the server for the user account or not is judged. Through the method, even though the challenge code utilized this time is acquired by a listener and the like, a real password cannot be restored, and therefore the security of the user account can be ensured reliably. In addition, when the service based on the password authentication technology is provided for oversea users, the security of user accounts of the oversea users can be ensured.

Password authentication method, equipment and system

The invention relates to the field of communication, and provides a verification method. The verification method comprises the following steps: receiving, by a verification code server, a verificationcode acquisition request sent by a client; generating and storing a system verification code, wherein the system verification code is determined by a string of random texts; encoding the system verification code into n original pictures to generate k verification code pictures, wherein k and n are integers greater than 2, and k is less than or equal to n; sending the k verification code picturesto the client; receiving a verification request sent by the client, wherein the verification request carries a verification code input by a user according to the k verification code pictures; and determining whether the verification code input by the user is correct according to the system verification code. By adoption of the above scheme, the randomly generated system verification code is codedinto the n original pictures, which not only increases the difficulty of machine recognition, but also can ensure the security of the verification code.

Verification method and system, and server

Identity authentication method based on visual cryptography

The invention provides a one-time pad password system based on visual cryptography. The technical scheme is that the one-time pad password system comprises a main-control module, an identity characteristic input interface, a visual information display terminal, a password input terminal and a plurality of subscriber masking pictures, wherein each subscriber masking picture corresponds to a subscriber; the identity characteristic input interface receives the identity characteristic data input of subscribers and sends the identity characteristic data input to the main-control module; the password input terminal receives the password input and sends the password input to the main-control module; the visual information display terminal receives visual cryptography subsidiary pictures sent by the main-control module and displays the visual cryptography subsidiary pictures to the subscribers; the subscribers place the possessed subscriber masking pictures on a first aligning frame to acquire the password P at the time; the main-control module comprises a master control program and a database; the main-control module takes a computer system as the platform and further comprises another master control program and another database to achieve subscriber register and authentication identification. The one-time pad password system provided by the invention can achieve safe, convenient andefficient subscriber identity authentication.

Ming Xian

Papers

Identity authentication method based on visual cryptography

One-time pad password system based on visual cryptography