A Realization Method of Dynamically Encrypted SMS Between Mobile App and Host
A mobile phone application and dynamic encryption technology, which is applied in the direction of synchronous sending/receiving encryption equipment, secure communication devices, digital transmission systems, etc.
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[0037] Table 1: Transmission Format
[0038]
[0039]
[0040] The specific implementation steps are as follows:
[0041] 1. A dynamic encrypted message is composed of a non-encrypted message header (PackHead) and an encrypted part (Content). The complete dynamic encrypted message format is shown in Table 1;
[0042] 2. Set the password to be encrypted, assuming the password is "dinsafe";
[0043] 3. Timestamp BCD code: the upper 4 bits of the byte are used to store the ten digits of the hour, minute, second, day, and month, and the lower 4 bits of the byte are used to store the individual of the hour, minute, second, day, and month The number of digits, for example, the time "16:30:56 December 31" is written as a 10-digit timestamp in the format "1630563112", and the timestamp array of BCD code is "16 30 56 31 12";
[0044] 4. XOR the BCD code timestamp with the Content in Table 1 to realize the first encryption of the content;
[0045] 5. XOR the password "dinsafe" ...
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