摘要: Computer programs often work with a variety of sensitive data and class String is widely used in object-oriented programming languages for this purpose. However, saving to object not safe as it encrypted may still be the operating memory even after no longer needed. Due non-deterministic behaviour mechanism responsible removing unused items from memory, we cannot say certainty when will actually removed. If an attacker gets either part or entire image, then they can easily read these data. This paper discusses options oriented that provide programmers way storing form. We present pseudo code secure compliant Data retention Cryptography requirements PCI DSS standard.