Applied to on-line content the advertising model leads to similar problems like in the traditional media. Dependence on advertising revenue puts pressure on content providers to consider advertising interests. Nevertheless new difficulties caused by the technical structure of online media, missing legal regulation and not yet established ethical rules, appear.
TEXTBLOCK 1/2 // URL: http://world-information.org/wio/infostructure/100437611652/100438658181
some essential definitions in the field of cryptography are:
-
-
-
"Few false ideas have more firmly gripped the minds of so many intelligent men than the one that, if they just tried, they could invent a cipher that no one could break." (David Kahn)
The variants of encryption systems are endless.
For deciphering there exists always the same game of trial and error (first guessing the encryption method, then the code). A help to do so is pruning. Once, after a more or less long or short period a code/cipher breaks. Monoalphabetic ciphers can be broken easily and of course are no longer used today but for games.
for further information on codes and ciphers etc. see:
TEXTBLOCK 2/2 // URL: http://world-information.org/wio/infostructure/100437611776/100438659070
Polybius was one of the greatest historians of the ancient Greek. he lived from 200-118 BC. see: