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Cryptography of Information System Data

As technology begins to advance, with the advent of widely available quantum computer systems, it has become more essential for companies to provide themselves with a more than adequate Information Security system, using the latest cryptographic methods with the leverage to counter and threats in the near future. It is impossible to deploy a truly secure crytosystem for the long term future since technology develops at an unpredictable speed.
Even so, crytography has the limitation in that it is only able to provide a method of detecting any change in the data which it contains during transit. Different sectors may define the basic rules in cryptography differently:-

From a crytographers point of view, cryptography can provide authentication and not availability, this is mainly due to the fact that, it is not possible to gurantee availability like during the transmission of data, keys etc.... A particular system may be subjected to DoS attacks, which cannot be prevented in cryptography.

Decisions have to be made before cryptography may be deployed, such decisions depend upon whether cryptography will be used in software or hardware. The problem with such choices are that any software chosen may contain bugs, as well as hardware which may contain errors.
In order for cryptosystems to be successful, both parties need to possess the same version of software or hardware in order for encryption and decryption to be a success. Another challenge is in the installation of any software or hardware in the sense that correct procedures have to be followed such as defining initial keys, as factory default keys may be set at all zero's. For this reason a secure key management scheme need to be in place.

Cryptography essentially only provides a secure end to end security, between the encryption machine, and the decryption machine. Cryptography does not protect past these points, such as the plaintext being stored in residual memory, or being viewed on a terminal. Any protection present only occurs upon the encryption of data.

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