WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Options
Query Language
Stem
Sort by:
List Length
Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2001035572) METHOD AND APPARATUS FOR EFFICIENT IRREGULAR SYNCHRONIZATION OF A STREAM CIPHER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/035572 International Application No.: PCT/US2000/031197
Publication Date: 17.05.2001 International Filing Date: 13.11.2000
Chapter 2 Demand Filed: 08.06.2001
IPC:
H04L 9/12 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9
Arrangements for secret or secure communication
12
Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
Applicants: QUALCOMM INCORPORATED[US/US]; 5775 Morehouse Drive San Diego, CA 92121-1714, US
Inventors: ROSE, Gregory, G.; AU
Agent: WADSWORTH, Philip, R. ; Qualcomm Incorporated 5775 Morehouse Drive San Diego, CA 92121-1714, US
Priority Data:
09/438,34211.11.1999US
Title (EN) METHOD AND APPARATUS FOR EFFICIENT IRREGULAR SYNCHRONIZATION OF A STREAM CIPHER
(FR) PROCEDE ET APPAREIL PERMETTANT UNE SYNCHRONISATION IRREGULIERE EFFICACE D'UN CODE CHAINE
Abstract:
(EN) A method and apparatus for efficiently synchronizing a stream cipher. State information is transmitted that will allow the intented recipient of the encrypted data stream to set a stream cipher generator to the correct state from which to start generating the stream cipher. A cycle number indicating the current state of a linear feedback shift register and a stutter number indicating whether an output of the linear feedback shift register is dropped are both transmitted to a remote station along with the encrypted data stream.
(FR) L'invention porte sur un procédé et un appareil de synchronisation efficace d'un code chaîné. On transmet des informations d'état qui permettront au destinataire prévu du train de données crypté de placer un générateur de code chaîné dans l'état requis à partir duquel on peut commencer à créer le code chaîné. Un nombre cyclique indiquant l'état actuel d'un registre à décalage à rebouclage linéaire, ainsi qu'un nombre de saut indiquant si une sortie dudit registre a été ou non sautée sont tous deux transmis à une station distante ainsi que le code chaîné.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)