Everyday Cryptography Fundamental Principles and Applications
Cryptography is a subject whose relevance to everyday life has undergone a dramatic transformation. Cryptography used to manifest itself in the public imagination through its historical use, primarily to protect military communications, and through recreational puzzles. However, largely due to the development of computer networks, particularly the Internet, most of us now use cryptography on a daily basis. Cryptography is fundamental to the provision of a wider notion of information security. Electronic information can easily be transmitted and stored in relatively insecure environments. This has resulted in fundamental changes to the risks to which information is exposed. As the financial impact of information security incidents rises, so does the need for information security protection and control. Cryptography is a vital technology which underpins many of these controls. It provides a suite of basic mechanisms for implementing the security services that protect electronic information, such as confidentiality, data integrity, and authentication. Cryptography does not secure information on its own, but many technical mechanisms for protecting information have cryptography at their core. Cryptography is thus an important subject for anyone with an interest in information security. Other reasons for the wide interest in cryptography as a subject are that:
• Cryptography plays an interesting political role. It is a key technology during times of conflict. Its modern use presents society with several intriguing moral and political dilemmas.
• Cryptography has a wide intrinsic appeal to the general public. Many people are fascinated by ‘secrets’ and ‘codes’. This has been successfully exploited by the mainstream media.
• Cryptography plays an interesting political role. It is a key technology during times of conflict. Its modern use presents society with several intriguing moral and political dilemmas.
• Cryptography has a wide intrinsic appeal to the general public. Many people are fascinated by ‘secrets’ and ‘codes’. This has been successfully exploited by the mainstream media.
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