File encryption technology to many, which is divided into different levels to suit different occasions. Here are the most simple file encryption technology, which uses file-by-byte XOR with the password encryption methods on paper, when the decryption , only to run again encryption procedures. The following is an example program can encrypt any file, passwords require the user to input, limited to eight or less (of course you can then change). program has good fault-tolerant design, This is what we should learn.

文件加密.c

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