Very large (tested for more than 2048 bits) prime number generator and tester program. This is well written and based on solid algorithms in this field. Source code is my own, used for Masters course in Cryptography. Program has easily readable and

本系统主要实现ATM提款机的主要功能，包括系统自动识别卡号，验证用户信息（如果输入的密码三次错误时，系统自动扣留本信用卡），查询当前用户信用卡的余额，修改用户密码，打印清单，取款等功能。-The system is mainly to achieve the main function of ATM cash machines, including automatic identification card system to verify user information (if you en

Program to calcule ciclic redundance check crc16 write in Java. mifare desfire ev1.

Program to calcule ciclic redundance check crc32 write in Java.It is to mifare desfire ev1.

MD5 Digest Sample, it give a java code example to do a check sum for a byte array.