Information processing method and device

Abstract

The invention provides an information processing method and device. The information processing device executes a QKD algorithm, and shares one N-bit original key R between a first party and a second party; the bit information between the (j-l)th bit and the (j+l)th bit in the original key R is utilized to calculate key information Qj, j is larger than or equal to 1 and smaller than or equal to N, and l is a security parameter; the key information Qj is converted into a binary number Q'j; and exclusive or addition operation is performed on all bit values of the binary number Q'j to generate the jth bit Oj in the final key so as to obtain the final key O. The security of the QPQ protocol is greatly improved while the communication complexity is reduced.

Description

technical field

[0001] The present disclosure relates to the security field, and in particular to an information processing method and device. Background technique

[0002] With the rapid development and popularization of Internet informatization, the emergence of massive information has also brought a series of information security issues. As an important security technology, cryptography has laid an important foundation for the development of information security. Since the research basis of classical cryptography is Shannon's secure communication theory, security proof relies on mathematical theory for support. Due to the powerful computing power of quantum computing. Many problems that were unsolvable in the field of classical cryptography become solvable. Therefore, designing a new cryptographic algorithm to resist the threat of being deciphered has become a hot spot.

[0003] The development of the quantum private query protocol has gone through two stages. The firs...

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