The file lib_crc.c contains source code for functions to calculate five commonly used CRC values: CRC-16, CRC-32, CRC-DNP, CRC-SICK, CRC-Kermit and CRC-CCITT. The functions can be freely used. - The file lib_crc.c contains source cod

可随机产生素数，对输入的明文进行加密，病对密文解密还原为明文-Can be randomly generated prime numbers, the input plaintext is encrypted, the sick of the ciphertext is decrypted to restore the plaintext