同时，还详细论述了加密系统中ISA卡的硬件原理、四码代数加密法的原理、加密软件的设计以及系统的安全特性。
The ISA card is made of X76F100 and the hardware principle, the principle of encryption method, the design of the cipher software and the safety characteristics of the system are also described.
同时，还详细论述了加密系统中ISA卡的硬件原理、四码代数加密法的原理、加密软件的设计以及系统的安全特性。
The ISA card is made of X76F100 and the hardware principle, the principle of encryption method, the design of the cipher software and the safety characteristics of the system are also described.
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