MD5-code-based method and system applied to backup and reduction of application program data
A technology of application program and data backup, which is used in the direction of data error detection and response error generation, which can solve the loss of important information, poor experience effect, and not many application data backup, update and recovery. See and other problems, achieve the effect of improving operation speed and saving traffic
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[0044] Example 1
[0045]Message Digest Algorithm MD5 (the fifth edition of Message Digest Algorithm in Chinese) is a hash function widely used in the field of computer security to provide integrity protection of messages. The file number for this algorithm is RFC 1321 (R. Rivest, MIT Laboratory for Computer Science and RSA Data Security Inc. April 1992)
[0046] MD5 is Message-Digest Algorithm 5, which is used to ensure complete and consistent information transmission. It is one of the hash algorithms widely used in computers (also translated digest algorithm, hash algorithm), and mainstream programming languages generally have MD5 implementations.
[0047] The operation of data (such as Chinese characters) into another fixed-length value is the basic principle of the hash algorithm. The predecessors of MD5 are MD2, MD3 and MD4.
[0048] The purpose of MD5 is to allow large amounts of information to be "compressed" into a secure format (that is, to convert a string of byt...
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[0072] Embodiment 2
[0073] See figure 2 , figure 2 It is a block diagram of the system composition of the application data backup and restoration based on MD5 code in the second embodiment. The second embodiment discloses an MD5 code-based application data backup and restoration system, which is applied to an intelligent mobile terminal, wherein the intelligent mobile terminal includes a mobile phone, a tablet computer, and a palmtop Internet access device. like figure 2 As can be seen, the system includes the following devices:
[0074] 1. Backup storage device for application data,
[0075] The device calculates the MD5 value of each file through the MD5 information digest algorithm for the relevant files of the application, and then backs up and stores it on the cloud server together with the version number of the application, the names of all related files and the corresponding existing directory path.
[0076] This device can be further subdivided into the follo...
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