Biogal Gyogyszergyar

Intelligens Technologiak Kft.

Dyntell Magyarorszag Kft.

Geza Horvath

Pal Bela Domosi

Janos Balint

Sandor Jancso

Rezso Bognar

Karoly Lapis

Bela Szende

Istvan Kovacs

Ildiko Mihok Nee Borbely

Andras Jenei

Mariann Fekete Nee Huszka

Marianna Salgane Medveczki

Zoltan Gyorgydeak

Judit Krusper Nee Ham

Attila Jakab

Peter Salga

Ferenc Pusztai

Terezia Mile

The subject of the invention is a symmetric key stream cipher cryptographic method for encrypting plaintexts and decrypting ciphertexts during which process a text to be encrypted or an encrypted text is scanned with an input/output data buffer (), a pseudo random number is created with a pseudo random number generator () with a seed (), a key automaton () is used for encryption and/or decryption. It is characterized in that the procedure involves the method whereby using the characters of the text scanned by the input/output data buffer () and the pseudo random number generated by the pseudo random number generator (), an element of the key automaton's () transition matrix is directly reached from the input/output data buffer (); the procedure is then repeated. A symmetric key stream cipher cryptographic device for implementing the method of claimis also the subject of the invention.

Symmetric key stream cipher cryptographic method and device

The invention is, firstly, a cryptographic apparatus for encrypting unencrypted data, comprising an input module for inputting the unencrypted data and an output module for outputting encrypted data, and a key automaton () adapted for converting the unencrypted data into the encrypted data, and the key automaton () is an composition of automata said composition of automata having a set of states and a set of input signals identical to each other and being implemented as a permutation automaton without output signals, said composition of automata comprises at least one factor automaton without output signals, each of the unencrypted data and the encrypted data has a character set identical to each other, and the set of states and the set of input signals, respectively, consist of blocks obtained from all possible combinations of said character set, wherein the blocks are of a predetermined block length. The invention is, furthermore, a cryptographic apparatus for decrypting encrypted data. The invention is, thirdly, a cryptographic method for encrypting unencrypted data. The invention is, fourthly, a cryptographic method for decrypting encrypted data.

Cryptographic apparatuses and methods for encrypting and decrypting data using automata

The invention relates to novel thiazolidine-4(S)-carboxylic acid derivatives of the general formula (I) ##STR1## wherein R.sup.1 stands for an optionally substituted furyl, pyrrolyl, thienyl, benzofuryl, benzopyrrolyl, benzothienyl, phenyl, pyridyl, quinolinyl, isoquinolinyl or indanyl group or a C.sub.1-4 alkyl or C.sub.2-4 alkenyl group optionally substituted by a hydroxyl, carboxyl or halogen fenoxy group,

Thiazolidinecarboxylic acid derivatives and treatment of liver diseases

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Debrecen, Hungary

Geza Horvath