ASCII code for a total of 256 is 2 to the 8th power, accounting for 8-bit binary, this binary consists of two eight parts, each accounting for 4-bit encryption.
因为ASCII码共有256个也就是2的8次方，占8位二进制，把这八位二进制分为两部分，每部分占4位进行加密。
ASCII code for a total of 256 is 2 to the 8th power, accounting for 8-bit binary, this binary consists of two eight parts, each accounting for 4-bit encryption.
因为ASCII码共有256个也就是2的8次方，占8位二进制，把这八位二进制分为两部分，每部分占4位进行加密。
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