As stated before the sense of cryptography is a properly designed cryptosystem making it essentially impossible to recover encrypted data without any knowledge of the used key. The issue of lost keys and the being-locked-out from one's own data as a consequence favors key recovery systems. On the other hand the counter argument is confidentiality: as soon as a possibility to recover a key is provided, the chances for abuses grow.
Finally it is the state that does not want to provide too much secrecy. On the contrary. During the last 20 years endless discussions about the state's necessity and right to restrict private cryptography have taken place, as the governments rarely care for the benefit of private users if they believe in catching essential informations about any kind of enemy, hence looking for unrestricted access to all keys.
The list of "key recovery," "key escrow," and "trusted third-party" as encryption requirements, suggested by governmental agencies, covers all the latest developments and inventions in digital technology.
At the same time the NSA, one of the world's most advanced and most secret enterprises for cryptography, worked hard in getting laws through to forbid the private use of strong encryption in one way or the other. Still, it is also organizations like this one that have to admit that key recovery systems are not without any weaknesses, as the U.S. Escrowed Encryption Standard, the basis for the famous and controversially discussed Clipper Chip, showed. The reason for those weaknesses is the high complexity of those systems.
Another aspect is that key recovery systems are more expensive and certainly much less secure than other systems. So, why should anyone use them?
In that context, one has to understand the legal framework for the use of cryptography, a strict framework in fact, being in high contradiction to the globalised flow of communication.
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The new U.S. regulations are based on the Wassenaar Arrangement Revision of 1998, where exports without license of 56 bit
For more information see:
Seven states stay excluded from the new freedom. These are states like Libya, Iraq, Iran, North Korea and Cuba, altogether states seen as terrorist supporting. No encryption tools may be exported into those countries.
This is, what happened in the USA, whereas in Germany the issue of a cryptography-law is still on the agenda. Until now, in Germany, everyone can decide by her-/himself, whether she/he wants to encrypt electronic messages or not. Some organizations fear that this could get changed soon. Therefore an urgent action was organized in February 2000 to demonstrate the government that people want the freedom to decide on their own. One governmental argument is that only very few people actually use cryptography. Therefore the urgent action is organized as a campaign for using it more frequently.
For more information on this see:
Other European countries have more liberate laws on cryptography, like France. Austria doesn't have any restrictions at all, probably because of a governmental lack of interest more than accepting freedom.
The (former) restrictions in the bigger countries influenced and hindered developments for safer key-systems, e.g. the key-length was held down extraordinarily.
"Due to the suspicious nature of crypto users I have a feeling DES will be with us forever, we will just keep adding keys and cycles (...). There is a parallel between designing electronic commerce infrastructure today that uses weak cryptography (i.e. 40 or 56 bit keys) and, say, designing air traffic control systems in the '60s using two digit year fields. (...) Just because you can retire before it all blows up doesn't make it any less irresponsible."
(Arnold G. Reinhold)
The Chinese State Encryption Management Commission (SEMC) announced in March 2000 that only strong encryption tools will have to be registered in the future. Which sounds so nice on first sight, does not mean a lot in reality: any kind of useful encryption technique, like the
The restrictions and prohibitions for cryptography are part of the states' wish to acquire more control - in the name of the battle against criminality, probably?
Due to the emerging organized criminality the governments want to obtain more freedom of control over citizens. Organizations like the NSA appear as the leaders of such demands.
What about civil rights or Human Rights?
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17th century Cardinal Richelieu invents an encryption-tool called grille, a card with holes for writing messages on paper into the holes of those cards. Afterwards he removes the cards and fills in the blanks, so the message looks like an ordinary letter. The recipient needs to own the same card
- Bishop John Wilkins invents a cryptologic system looking like music notes. In a book he describes several forms of steganographic systems like secrets inks, but also the string cipher. He mentions the so-called Pig Latin, a spoken way of encryption that was already used by the ancient Indians
- the English scientist, magician and astrologer
1605/1623 Sir Francis Bacon (= Francis Tudor = William Shakespeare?) writes several works containing ideas about cryptography. One of his most important advises is to use ciphers in such a way that no-one gets suspicious that the text could be enciphered. For this the steganogram was the best method, very often used in poems. The attempt to decipher Shakespeare's sonnets (in the 20th century) lead to the idea that his works had been written by Francis Bacon originally.
1671 Leibniz invents a calculating machine that uses the binary scale which we still use today, more advanced of course, called the ASCII code
18th century this is the time of the Black Chambers of espionage in Europe, Vienna having one of the most effective ones, called the "Geheime Kabinettskanzlei", headed by Baron Ignaz von Koch. Its task is to read through international diplomatic mail, copy letters and return them to the post-office the same morning. Supposedly about 100 letters are dealt with each day.
1790's Thomas Jefferson and Robert Patterson invent a wheel cipher
1799 the Rosetta Stone is found and makes it possible to decipher the Egyptian Hieroglyphs
1832 or 1838 Sam Morse develops the Morse Code, which actually is no code but an enciphered alphabet of short and long sounds. The first Morse code-message is sent by telegraph in 1844.
1834 the
1844 the invention of the telegraph changes cryptography very much, as codes are absolutely necessary by then
1854 the Playfair cipher is invented by Sir Charles Wheatstone
1859 for the first time a tomographic cipher gets described
1861 Friedrich W. Kasiski does a cryptoanalysis of the Vigenère ciphers, which had been supposed to be uncrackable for ages
1891 Major Etienne Bazeries creates a new version of the wheel cipher, which is rejected by the French Army
1895 the invention of the radio changes cryptography-tasks again and makes them even more important
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The skytale (pronunciation: ski-ta-le) was a Spartan tool for encryption. It consisted of a piece of wood and a leather-strip. Any communicating party needed exactly the same size wooden stick. The secret message was written on the leather-strip that was wound around the wood, unwound again and sent to the recipient by a messenger. The recipient would rewound the leather and by doing this enciphering the message.