code: function(value, salt) {
      Object.defineProperty(this, '_value', { value: new Uint8Array(value) });
      Object.defineProperty(this, '_salt', { value: new Uint8Array(salt) });
  }
docs: Protected value, used for protected entry fields
  @param {ArrayBuffer} value - encrypted value
  @param {ArrayBuffer} salt - salt bytes
  @constructor