Cryptography
Information protection uses cryptography to change usable information into a form that renders it ineffectual by anyone other than an official user; this procedure is call encryption. In sequence that has been encrypted (rendered unusable) can be transformed
Back into its unique usable form by an authorized user, who possesses the cryptographic key, from side to side the process of decryption. Cryptography is used in information safety to protect information from illegal or accidental discloser while the information is in transit (either electronically or physically) and at the same time as information is in storage.
Cryptography provides information safety with other practical applications as well including improved authentication message digests, methods, digital signatures, non- refutation, and coded network communications. Older less secure application such as telnet and ftp are slowly being substituted with more secure applications such as ssh that use encrypted network communications. Wireless communications can be coded using the WPA or WEP protocols. Software applications for example GNUPG or PGP can be used to encrypt data files and Email.
Cryptography can bring in security problems when it is not executed properly. Cryptographic clarification need to be implemented using industry accepted solutions that have undergone rigorous peer assessment by independent experts in cryptography. The strength and lenth of the encryption key is also an important thought. A type that is feeble or too short will produce weak encryption. The keys used for decryption and encryption must be protected with the same degree of rigor as any other confidential information. They must be sheltered from illegal disclosure and destruction and they must be obtainable when needed. PKI solutions address many of the troubles that surround key management.