{"product_id":"cryptography-proceedings-of-the-workshop-on-cryptography-burg-feuerstein-germany-march-29-april-2-1982-von-t-beth-hrsg","title":"Cryptography","description":"\u003cp\u003eT. Beth (Ed.): Cryptography - EUROCRYPT '82, LNCS 149, pp. 1-28, 1983. 0 Springer-Verlag Berlin Heidelberg 1983 3 Having all of a sudden left the shady corner of semi-military art, modern cryptography has become a central topic of research in all areas of communication science. Definitions (cf. Bauer pp. 31 - 48) Cryptographic measures are applied to p- tect valuable data during transmission against unwanted interception INTERCEPTOR Fig. A: passive violation and (possibly undectable) forgery . Fig. 2: acti-se violation In accordance with the subsequent paper of Bauer (pp. 31 - 481, the technique applied to meet these requirements is called en- tion. In this process the transmitter enciphers (or encrypts) a plaintext message into a ciphertext. 4 ciphertexc ciphering Fig. 3: The Wire-tap-channel This transformation is called a cipher(function) which the au- rized receiver deciphers (decrypts). An enemy is a person or institution who wants illegal access to the messages. Assuming that the enemy can only get hold of the ciph- texts, he has to perform a cryptanalysis in order to reconstitute the plaintexts. To add to the difficulties for a cryptanalyst, the cipher functions are chosen to a varying parameter, called the key. A generator cryptosystem consists of a class of injective cipher functions ES:M-C , mapping plaintext messages(EM) into ciphertexts(EC) . The parameter s runs through the set K of keys. These formulations are best demonstrated by the basic, classical examples.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783540119937\"\u003e\u003ch3\u003eProceedings of the Workshop on Cryptography, Burg Feuerstein, Germany, March 29 - April 2, 1982\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9783540119937","offer_id":39436388728925,"sku":"9783540119937","price":53.49,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/26a6f13f-180a-4f53-8237-f919564d354b.jpg?v=1773553616","url":"https:\/\/shop.autorenwelt.de\/products\/cryptography-proceedings-of-the-workshop-on-cryptography-burg-feuerstein-germany-march-29-april-2-1982-von-t-beth-hrsg","provider":"Autorenwelt Shop","version":"1.0","type":"link"}