Deutschetelekom Ag

Peter Windirsch

Klaus Huber

Ralf Schaffelhofer

Matthias Baumgart

Tim Schneider

The invention relates to a device for implementing a block-ciphering process using an encryption/decryption arithmetic-logic module ( ) which is supplied with the data stream of word length j&lE;n to be ciphered. The invention is characterized in that the arithmetic-logic module ( ) includes a plurality of encryption/decryption elements ( ), each of which forms a stage of a computing pipeline, the stages being designed such that they operate independently of each other in different modes of operation and with different keys. Supported by further components and data paths surrounding the encryption/decryption arithmetic-logic module ( ), the invention allows up to p data streams, each with independently selectable word lengths j&lE;n and modes of operation, to be encrypted or decrypted simultaneously. In addition, the architecture of the device permits different logical data streams to be processed directly consecutively and free of conflict on the physical channels provided by the hardware resources.

Device for implementing a block-ciphering process

In a method for compressing data, in which, in a data stream composed of characters, character strings are checked for correlation with other character strings that are present at a given distance in the data stream, and in which, in each case, the number of correlating characters and the position of the correlating characters within the respective other character string constitute the compressed data, at least one character is allowed to differ in the correlation check and data for correcting the at least one differing character is inserted into the compressed data.

Growing community of inventors

Dreieich, Germany

Peter Windirsch