基于51单片机的密码锁设计

多数程序设计语言处理整数的能力是有限的，如C语言中，int类型数据范围是-32767----32767。实际问题的处理过程中往往涉及大整数的运算，如RSA加密算法要求至少64bit的整数，本程序是设计算法实现大整数的加减运算。-majority programming language processing is integral to the limited capacity, such as C language, int data type is the scope-32767---- 32767. Practical problems of the treatment process often involves large integer arithmetic, such as the RSA encryption algorithm requires at least 64-bit integers, the procedure is designed algorithm large integer addition and subtraction operations.

笔者长期从事移动通信系统的无线链路调制与解调、物理层实现方面的工作。在移动通信GSM系统中，我们进行语音或者业务信道解调时，都会遇到CRC的求解。通常在硬件DSP实现时，特别是40位CRC求解时候，由于生成多项式有41项，DSP最大一次能处理40位，所以使用单个寄存器会遇到一些困难，那么以下这个程序将会解决这一困难（这是针对定点DSP、C55xx的编程实现方法）。-The author has long been engaged in mobile communication system modulation and demodulation of wireless links, the physical layer to achieve work. GSM in the mobile communications system, we have a voice or channel demodulation operations, it will encounter the solution of CRC. DSP hardware usually realize, especially when solving the 40 CRC, as the generation polynomial has 41, DSP can handle the largest 40, so using a single register may encounter some difficulties, then following this process will solve this One difficulty (which is for fixed-point DSP, C55xx realize programming methods).

主要介绍算法的实现方式和流水线实现，而且有详细的原理介绍，推理，源码和仿真结果-The main way of introduction Algorithm and pipelining to achieve, but also has a detailed introduction of the principle, reasoning, source code and simulation results

用vb实现的文本加密算法-used to achieve the text encryption algorithm

栅格加密法,IDE vc6,方法比较简单,适合初学者理解-Lattice

转CRC16的小程序,很好用呀,大家试一试-CRC16 turn a small program, very good with the ah, we try

IBM的MARS加密算法-IBMMARS

Internet上的PIK加密算法源程序-on the Internet PIK encryption algorithm source code

base64 coder/decoder

一个非常好的ASE代码，通过实验证明能编译通过-A perfect AES program code, and it can be run after translation and edition.