Method for achieving dynamic short message encryption between cell-phone application procedure and host

[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" wit