crypto/src/main/java/org/springframework/security/crypto/encrypt/Encryptors.java
public static BytesEncryptor standard(CharSequence password, CharSequence salt) {
		return new AesBytesEncryptor(password.toString(), salt,
				KeyGenerators.secureRandom(16));
	}
public static BytesEncryptor standard(CharSequence password, CharSequence salt) {
		return new AesBytesEncryptor(password.toString(), salt,
				KeyGenerators.secureRandom(16));
	}
Creates a standard password-based bytes encryptor using 256 bit AES encryption.
Derives the secret key using PKCS #5's PBKDF2 (Password-Based Key Derivation
Function #2). Salts the password to prevent dictionary attacks against the key. The
provided salt is expected to be hex-encoded; it should be random and at least 8
bytes in length. Also applies a random 16 byte initialization vector to ensure each
encrypted message will be unique. Requires Java 6.

@param password the password used to generate the encryptor's secret key; should
not be shared
@param salt a hex-encoded, random, site-global salt value to use to generate the
key