In an increasingly technisised world where technology has also become a determinant of value-free values, mind and body are increasingly considered as "imperfect" compared to the brilliant designs of technology. While for centuries the "weakness" of the human flesh has been the object of lamentations, the 21st century seems set to transform the genre of tragedy into a sober technological project of improvement. Within this project, men and women receive the status of "risk factor" which potentially destabilises technological systems, a circumstance which calls for correction and control measures.
Two main ways of checking the risk of "human error", as well as inefficiency, irrationality, selfishness, emotional turbulence, and other weaknesses of human beings: by minimizing human participation in technological processes, and, to an increasing extent, by technically eliminating such risk factors in human beings themselves.
Human beings, once considering themselves as the "crown of creation" or the "masters of the world" are reducing themselves to the "human factor" in globally networked technical systems, that factor which still escapes reliable calculation and which, when interacting with fast and potent technical environments, is a source of imperfection. For the human mind and body to perfect itself - to adapt itself to the horizon of perfection of science and technology - takes long time periods of discipline, learning, even biological evolution.
In the calculating thinking required in highly technisised context, mind and body inevitably appear as deficient compared to a technology which, unlike the human organism, has the potential of fast and controlled "improvement". Surely, the human organism has always been prey to defects, to "illnesses" and "disablement". Disease has therefore been one of the main motivations behind the development of Bio-ITs: Bio-ITs are being developed to help the blind get their eyesight back, the deaf to hear, the lame to walk, the depressed to be happy. Such medical applications of Bio-ITs are nothing essentially new: Captain Silver's crunch, the wheelchair, a tooth filling save the same basic purpose of correcting a physical deficiency.
But there is a much wider scope to this new development, in which the "normal" biological condition of a human being, such as proneness to death, forgetfulness, aging, inefficiency, solitude, or boredom are understood as defects which can and should be corrected. The use of ITs to overcome such "biological" constraints is often seen as the "ultimate" technological advance, even if the history of utopian visions connected to technological innovation is as old as it is rife with surprise, disappointment, and disaster.
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As stated, telecommunication is seen as an unreliable media for transporting secret messages. Therefore today, cryptography is needed more than ever before, especially for e-commerce.
Key cryptosystems try to provide more privacy.
symmetric-key cryptosystems:
The same key is used for both encryption and decryption. In this case the encipherer and the recipient of the message/text have to agree on a common key before the enciphering-process can start. And most of all they should trust each other. And exactly this is the main problem of this system: how to exchange the key without offering an opportunity for stealing it?
In former times messengers or pigeons were doing the exchange of those keys.
Symmetric-key systems make sense in small entities. If a lot of people are spread over a wide area and belong to the same network, distributing the keys starts getting complicated.
Today, those cryptosystems get controlled by other keys, based on highly complex mathematical algorithms.
some symmetric-key systems are:
- DES (Data Encryption Standard), the standard for credit cards
- Triple-DES, which is a variation of DES, encrypting the plaintext three times.
- IDEA (International Data Encryption Standard)
- blowfish encryption algorithm, which is said to be faster than DES and IDEA
Security and confidence are the key-words for a popular key-system: As DES and its successors have been used for so many years and by many people without having been broken, they are considered safe - safer than others, not used that frequently, no matter whether they are actually safer or not.
For further information see:
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