public void Base64Decode()
        {
            var samples = new[] {
                new { Input = "SGVsbG8gV29ybGQ=", Expected = "Hello World" },
                new { Input = "UsO4ZCBncsO4ZCBtZWQgZmzDuGRl", Expected = "Rød grød med fløde" }
            };

            foreach (var sample in samples)
            {
                Assert.AreEqual(sample.Expected, SecurityHelper.Base64Decode(sample.Input));
                Assert.AreEqual(sample.Expected, SecurityUtils.Base64Decode(sample.Input));
            }
        }