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1. (WO2007004992) SYSTEM AND METHOD FOR ENCRYPTING/DECRYPTING A CODED AUDIO SIGNAL, SYSTEM AND METHOD FOR GENERATING A SET OF CRYPTOGRAPHIC KEYS AND COMPUTER PROGRAM PRODUCTS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/004992    International Application No.:    PCT/SG2006/000181
Publication Date: 11.01.2007 International Filing Date: 28.06.2006
IPC:
H04L 9/32 (2006.01), G01L 19/02 (2006.01), H03M 7/30 (2006.01), G10L 19/24 (2013.01)
Applicants: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH [SG/SG]; 20 Biopolis Way #07-01, Centros, Singapore 138668 (SG) (For All Designated States Except US).
ANATHARAMAN, Lakshminarayanan [IN/SG]; (SG) (For US Only).
YU, Rongshan [CN/SG]; (SG) (For US Only).
AHMAD, Waqas [PK/SG]; (SG) (For US Only).
CHAN, Ti Eu [SG/SG]; (SG) (For US Only).
PANG, Hwee Hwa [SG/SG]; (SG) (For US Only).
RAHARDJA, Susanto [ID/SG]; (SG) (For US Only)
Inventors: ANATHARAMAN, Lakshminarayanan; (SG).
YU, Rongshan; (SG).
AHMAD, Waqas; (SG).
CHAN, Ti Eu; (SG).
PANG, Hwee Hwa; (SG).
RAHARDJA, Susanto; (SG)
Agent: BOGSCH, Adam; Viering, Jentschura & Partner, P.O. Box 1088, Rochor Post Office, Rochor Road, Singapore 911833 (SG)
Priority Data:
60/696,623 05.07.2005 US
Title (EN) SYSTEM AND METHOD FOR ENCRYPTING/DECRYPTING A CODED AUDIO SIGNAL, SYSTEM AND METHOD FOR GENERATING A SET OF CRYPTOGRAPHIC KEYS AND COMPUTER PROGRAM PRODUCTS
(FR) SYSTEME ET PROCEDE DE CHIFFREMENT/DE DECHIFFREMENT D'UN SIGNAL AUDIO CODE, SYSTEME ET PROCEDE DE GENERATION D'UN ENSEMBLE DE CLES CRYPTOGRAPHIQUES ET PRODUITS-PROGRAMMES INFORMATIQUES
Abstract: front page image
(EN)A method for encrypting a coded audio signal comprising a plurality of quality layers, is described wherein a first cryptographic key is generated for the audio signal, for each of at least one of the plurality of quality layers, a second cryptographic key is generated by applying a concatenation of one-way functions to the first cryptographic key and each of the at least one of the plurality of quality layers is encrypted using the second cryptographic key generated for the respective quality layer.
(FR)L'invention concerne un procédé de chiffrement d'un signal audio codé qui comprend une pluralité de couches de qualité. Selon ledit procédé, une première clé cryptographique est générée pour le signal audio ; pour chaque couche de qualité faisant partie de la pluralité de couches de qualité, une deuxième clé cryptographique est générée par application d'une concaténation de fonctions uniques sur la première clé cryptographique ; et chacune des couches de la pluralité de couches de qualité est chiffrée au moyen de la deuxième clé cryptographique générée pour la couche de qualité respective.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)