Android 加密 解密

參考

Android secure encrypted SharedPreferences example Tutorial

http://www.tutorialsface.com/2015/09/android-secure-encrypted-sharedpreferences-example-tutorial/

Android 加解密類Cipher    

http://blog.csdn.net/kyoky_xxj/article/details/9229013

Base64編碼及其做用    

http://blog.csdn.net/benbenxiongyuan/article/details/7756912

Cipher類    

http://book.2cto.com/201312/37681.html

MessageDigest簡介    

http://blog.csdn.net/hudashi/article/details/8394158

SecureRandom簡介

http://swiftlet.net/archives/1352