code: @Deprecated
      public Cipher encrypt() {
          try {
              Cipher cipher = Secret.getCipher(KEY_ALGORITHM);
              cipher.init(Cipher.ENCRYPT_MODE, getKey());
              return cipher;
          } catch (GeneralSecurityException e) {
              throw new AssertionError(e);
          }
      }
docs: Returns a {@link Cipher} object for encrypting with this key.
  @deprecated use {@link #encrypt(byte[])}