An encryption algorithm and its verification method based on nb-iot cloud lock communication

Abstract

The invention relates to an encryption algorithm based on NB-IOT cloud lock communication. The encryption algorithm comprises the process of encrypting a password by a door lock end and is implementedas follows: step A, the door lock end inputs a password a and a cloud server encrypts the password a for the first time by using an MD5 encryption algorithm to obtain a first MD5 value b; step B, a character string at the tail of the first MD5 value b is intercepted to obtain a character string c; step C, the character string c is encrypted for the second time by using an MD5 encryption algorithmto obtain a second MD5 Value d; step D, a character string at the tail of the second MD5 value d is intercepted to obtain a second string e, wherein the second character string e is a ciphertext f; and step E, the ciphertext f is stored in the door lock end. On the basis of two-times encryption and two-times interception, the security of the cloud lock password is improved and thus the cloud lockis protected from being cracked; when the mobile terminal verifies the door lock password, the ciphertext is obtained after the same encryption and then the ciphertext is compared with the ciphertextof the door lock end to obtain a verification result.

Description

technical field [0001] The invention relates to the field of algorithm encryption, in particular to an encryption algorithm based on NB-IOT cloud lock communication and a verification method thereof. Background technique [0002] In the field of the Internet of Things, data transmission between devices and between devices and the cloud is essential, and data security is particularly important, especially for security devices such as door locks, which are an important barrier for family safety. The password of the lock is encrypted, and all transmission processes use ciphertext to improve security. [0003] The existing encryption algorithm usually encrypts the password directly using the MD5 method. Although encryption using MD5 method is irreversible, hackers now have a large amount of MD5 original text / cipher text comparison database, which can quickly decipher the MD5 cipher text of commonly used passwords, and the passwords of users in social networking sites are basica...

AI Technical Summary

Problems solved by technology

Although encryption using MD5 method is irreversible, hackers now have a large amount of MD5 original text / cipher text comparison database, which can quickly decipher the MD5 cipher text of commonly used passwords, and the passwords of users in social networking sites are basically common passwords. The security of user passwords is greatly reduced

Images