Method and device for upgrading cryptographic algorithm

Abstract

Disclosed in the embodiments of the present invention are a method and relative device for upgrading cryptographic algorithm used for improving security in the process of upgrading cryptographic algorithm. The method in the embodiments of the present invention comprises: a server transmits a upgrading signal of the cryptographic algorithm to a device to be upgraded, chooses, from a target algorithm set, one or more target algorithms to perform cascade to generate a cascade algorithm when determining that all the algorithms in the target algorithm set are disabled algorithms after receiving a connection request sent from the device to be upgraded, and upgrades the cryptographic algorithm for the device to be upgraded by the upgrading packet of the cascade algorithm and cryptographic algorithm. As the cascade algorithm can improve the strength of algorithm security effectively, the security during the process of upgrading cryptographic algorithm can be improved effectively.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for upgrading a cryptographic algorithm and related equipment. Background technique [0002] With the wide application of mobile terminals, the security requirements for mobile terminals are also getting higher and higher, especially applications such as instant messaging and mobile payment have strong security requirements. All kinds of cryptographic algorithms are the core part to realize the security guarantee and support the normal operation of the security system, so they are widely used in various places of mobile terminals. [0003] In the prior art, a general method for upgrading a mobile terminal is: a server issues an upgrade package, and the mobile terminal downloads the upgrade package and then performs the upgrade. Multiple links in the upgrade process must use cryptographic algorithms for security protection. [0004] However, these cryptographic algorithms used...

AI Technical Summary

Problems solved by technology

[0004] However, these cryptographic algorithms used in the upgrade process may be unsafe algorithms, so these unsafe cryptographic algorithms can be disabled when upgrading the cryptographic algorithms. When all cryptographic algorithms on the mobile terminal are disabled, the server and mobile During the upgrade process of the password algorithm, the terminal may still use these disabled password algorithms to protect the upgrade process. Because these algorithms are not safe, it may cause problems such as system eavesdropping, man-in-the-middle attacks, and spoofing attacks.

Images