def decrypt(data)
      cipher = build_cipher(:decrypt)
      cipher.update(data.unpack('m')[0]) + cipher.final
    end
def decrypt(data)
      cipher = build_cipher(:decrypt)
      cipher.update(data.unpack('m')[0]) + cipher.final
    end
Creates a new cipher that uses a symmetric encryption strategy.

 Configuration options:
 * <tt>:algorithm</tt> - The algorithm to use for generating the encrypted string
 * <tt>:password</tt> - The secret value to use for generating the
   key/initialization vector for the algorithm
 Decrypts the current string using the current key and algorithm specified