public void setDecryptionCipherKey(byte[] decryptionCipherKey) {
        this.decryptionCipherKey = decryptionCipherKey;
    }
Sets the decryption key to use for decryption operations.

@param decryptionCipherKey the decryption key to use for decryption operations.
@see #setCipherService for a description of the various {@code get/set*Key} methods.
core/src/main/java/org/apache/shiro/mgt/AbstractRememberMeManager.java