JAVA中的Blowfish加密属于对称密钥算法，如果知道密钥，则可以对加密后的数据解密，但如果如果不知道密钥，基本上是不可能的，因此，这就决定了它的先天不足，就是带来的密钥的管理问题。

-JAVA The Blowfish symmetric key encryption algorithms are, if you know the key, you can decrypt the encrypted data, but if if you do not know the key, it is basically impossible, therefore, which determines its defects, is brought about key management issues.