passphrases

!--Security is strengthened by employing a PBKDF2 key derivation function.However, the weak passphrases users typically employ are vulnerable to password cracking attack.

安全性 en:PBKDF2 密钥导出函数 (en:key derivation function) 来增强的，然而使者采的典型的弱密语会被密码解攻击。