Method for encrypting and authenticating efficient data without authentication center

Abstract

The invention discloses a method for encrypting and authenticating efficient data without an authentication center, which comprises the following steps of: (1) determining system parameters; (2) registering information receiving and transmitting parties; (3) performing data encryption and authentication protection on plaintext messages to be sent to a receiver by a sender; and (4) reading and authenticating the received data messages by the receiver, wherein in the step (3), ciphertexts, signature parameters and electronic signatures are combined by calculating secret key parameters, calculating the ciphertexts and the signature parameters on the plaintext messages according to the secret key parameters and calculating the electronic signatures according to the plaintext messages, the signature parameters and the like to form and send the data messages. Through the method of the invention, data encryption and the authentication of content integrity on the plaintext messages can be performed simultaneously and efficiently, and a series of problems caused by adopting the authentication center in the conventional method can be prevented.

Description

technical field [0001] The invention relates to data protection technology in the fields of e-commerce, e-government, information security and network communication, in particular to an efficient data encryption and authentication method without an authentication center. Background technique [0002] In various fields related to information such as e-commerce system, e-government system, information security system, and network communication system, data encryption technology and electronic signature technology are two basic data protection technologies. Among them, data encryption technology protects the confidentiality of data. It converts data into meaningless ciphertext through encryption keys and data encryption algorithms to prevent data from being accessed by unauthorized persons. The electronic signature technology authenticates and protects the integrity and source of data, completely simulating the functions of handwritten signatures in real life, and has the capab...

AI Technical Summary

Problems solved by technology

However, in practical applications, since such methods use technologies such as electronic signatures, data encryption, and key distribution, they strongly rely on a trusted third-party organization as the certification center, in the authentication of electronic signatures, data encryption, and key distribution. In the process, the verifier and the certification center need to complete the relevant certification through real-time interaction, which not only brings a large calculation burden, communication burden and data expansion, but also limits the occasion of online operation, resulting in increased workload of the system. The work efficiency is reduced, offline data protection operations cannot be performed, and the needs of practical applications cannot be met, which seriously limits the promotion and application of related technologies.

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