Information Security Resources

Entries Tagged ‘Cryptographic Key’

Firewall: The Realization of a Company’s Internet and Network Access Policy

The original definition of a firewall is: “a partition made of fireproof material to prevent the spread of a fire from one part of a building or ship to another or to isolate an engine compartment, as on a plane, automobile, etc.” 1 Today, in the computer world, the term refers to any piece of […]

Leave a Comment

Cryptography – Revisited

Cryptography, or cryptology, derived from the Greek words for “hidden” writing or speaking, is the practice and study of hiding information. Until modern times, cryptography referred almost exclusively to encryption, the process of converting ordinary information (plain text) into unintelligible gibberish (confidentiality). Cryptography is now considered to be a branch of both mathematics and computer […]

Leave a Comment

The Concept of ‘Key’ in Cryptography

The main idea of cryptography is that a group of people can use private knowledge to keep written messages secret from everyone else. The original message sent is called PLAINTEXT. The message encrypted is called the CIPHERTEXT . In both encryption and decryption process, we need a KEY to be incorporated into the process. What […]

Leave a Comment