Java File Encryption Decryption using Password Based Encryption.

How PBE Works (Password Based Encryption)

• A user supplied password which is a simple text phrase that can be easily remembered by the user.
• Along with that password text, a random number which is called salt is added and hashed.
• Using this a AES or a DES encryption key is derived and encrypted.
• The password text is shared between the two parties exchanging the encrypted content.
• The receiver, uses the same password  and salt and decrypts the content.
• Here the key is passing or preserving the password phrase in a secure manner.