Dynamic password lock based on network privacy protection

The invention relates to a dynamic password lock based on network privacy protection, which is a dynamic password identification mechanism based on a challenge/response method. On the basis of a certain algorithm, during registration, a user randomly selects an algorithm rule and keeps the rule in mind to replace the past static password for direct registration; and during logging in, the user uses the registered algorithm rule and verification codes (random numbers) provided by a server to conduct simple calculation, a calculation result is used as password input at the time and therefore the goal of dynamic safe identification is achieved. The dynamic password lock based on the network privacy protection is characterized in that on the premise that privacy security is guaranteed, password dynamism can be realized without requiring third parties or any additional equipment and the privacy of the user can be prevented from being disclosed. According to experiments, the technique is safe, reliable, simple and convenient to use and the application cost is very low. The dynamic password lock based on the network privacy protection can be widely used in network systems for banks, social insurance, automatic teller machines, personal credit acquisition and the like which require network servers for logging in. The dynamic password lock based on the network privacy protection belongs to the technical field of communication and computers.