Most computer systems are far from being secure.
A lack of security - it is said - might hinder the developments of new information technologies. Everybody knows electronic transactions involve a more or less calculated risk. Rumors about insecurity let consumers doubt whether the commodity of e-commerce is bigger or its risks. First of all the market depends on the consumer's confidence. To provide that another application for public key cryptography gets essential: the digital signature, which is used to verify the authenticity of the sender of certain data.
It is done with a special private key, and the public key is verifying the signature. This is especially important if the involved parties do not know one another. The DSA (= Digital Signature Algorithm) is a public-key system which is only able to sign digitally, not to encrypt messages. In fact digital signature is the main-tool of cryptography in the private sector.
Digital signatures need to be given for safe electronic payment. It is a way to protect the confidentiality of the sent data, which of course could be provided by other ways of cryptography as well. Other security methods in this respect are still in development, like digital money (similar to credit cards or checks) or digital cash, a system that wants to be anonymous like cash, an idea not favored by governments as it provides many opportunities for money laundry and illegal transactions.
If intellectual property needs to be protected, a digital signature, together with a digital timestamp is regarded as an efficient tool.
In this context, the difference between identification and authentication is essential. In this context smartcards and firewalls are relevant, too.
A lot of digital transactions demand for passwords. More reliable for authentication are biometric identifiers, full of individual and unrepeatable codes, signatures that can hardly be forged.
For more terms of cryptography and more information see:
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The 1999
Adbusters, well known as fighters against corporate disinformation, injustices in the global economy and "physical and mental pollution", timely for the WTO Conference purchased three billboards in downtown Seattle. Featuring an image with the text "System Error - Type 2000 (progress)", the billboards were meant to challenge "... the WTO's agenda of global corporate growth and expose what isn't reflected in the United State's GNP - human and environmental capital."
At the same time RTMark went on-line with its spoof WTO website http://gatt.org. Shortly after its release WTO Director-General Mike Moore accused RTMark of attempting to "undermine WTO transparency" by copying the WTO website's design and using "domain names such as `www.gatt.org` and page titles such as 'World Trade Organization / GATT Home Page' which make it difficult for visitors to realize that these are fake pages." http://gatt.org is not the first time that RTMark has used website imitation aiming at rendering an entity more transparent. RTMark has performed the same "service" for
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Bruce Schneier is president of Counterpane Systems in Minneapolis. This consulting enterprise specialized in cryptography and computer security. He is the author of the book Applied Cryptography and inventor of the Blowfish and Twofish encryption algorithms.
The News Corporation Ltd., a global media holding company, which governed News Limited (Australia), News International (U.K.), and News America Holdings Inc. (U.S.) was founded by the Australian-born newspaper publisher and media entrepreneur, Rupert Murdoch. Murdoch's corporate interests center on newspaper, magazine, book, and electronic publishing; television broadcasting; and film and video production, principally in the United States, the United Kingdom, and Australia.
American holding company incorporated Jan. 22, 1969, to acquire, as its main
subsidiary, The Chase Manhattan Bank, NA, and to develop other related financial services and operations. The Chase Manhattan Bank itself had resulted from the merger in 1955 of the Bank of the Manhattan Company (founded 1799) and The Chase National Bank (founded 1877). Its headquarters are in New York City.