Encryption method and device based on shared root key, equipment and medium

Abstract

The embodiment of the invention discloses an encryption method and device based on a shared root key, equipment and a medium, and relates to a block chain technology. The method comprises the steps: obtaining a target function used for describing information and a root key corresponding to target information to be processed, wherein the target information comprises at least two pieces of sub-information; generating a key of each piece of sub-information in the at least two pieces of sub-information according to the root key; obtaining coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the target function; encrypting the coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information by adopting the key of each piece of sub-information to obtain a ciphertext of the coordinate information corresponding to each piece of sub-information; and determining the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and storing the ciphertext of the target information in a block chain network. By adopting the method, the security of information can be improved, the method is suitable for the field of smart medical treatment, and the construction of smart cities can be further promoted.

Description

technical field [0001] The present application relates to the technical field of blockchain, and in particular to an encryption method, device, equipment and medium based on a shared root key. Background technique [0002] At present, the Internet of Things has become an important part of the Internet, and the number of global Internet of Things devices has maintained rapid growth. In the future Internet of Things, any individual, group, community, organization, object, product, data, service, process and activity will will be interconnected through the Internet of Things. Different IoT devices need to receive and store a large amount of information every day. For example, medical devices in medical platforms need to receive and store a large amount of patient information, medical record information, etc. every day. In practice, it is found that the information stored in IoT devices is easily tampered with by illegal users, which leads to information leakage, resulting in r...

AI Technical Summary

Problems solved by technology

In practice, it has been found that the information stored in IoT devices is easily tampered with by illegal users, leading to information leakage, resulting in relatively low information security

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