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Search result: 6 of 22 |
(WO/2007/093946) IMPROVED METHOD OF CONTENT PROTECTION
- Biblio. Data
- Description
- Claims
- National Phase
- Notices
- Documents
| Latest bibliographic data on file with the International Bureau
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| IPC: | G11B 20/00 (2006.01), G06F 21/00 (2006.01), H04L 9/08 (2006.01) | |||||||||||
| Applicants: | KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1, NL-5621 BA Eindhoven (NL) (All Except US). TALSTRA, Johan, C. [NL/NL]; (NL) (US Only). STARING, Antonius, A., M. [NL/NL]; (NL) (US Only). | |||||||||||
| Inventors: | TALSTRA, Johan, C.; (NL). STARING, Antonius, A., M.; (NL). | |||||||||||
| Agent: | GROENENDAAL, Antonius, W., M. et al.; Prof. Holstlaan 6, NL-5656 AA Eindhoven (NL). | |||||||||||
| Priority Data: |
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| Title: | IMPROVED METHOD OF CONTENT PROTECTION | |||||||||||
| Abstract: | A method of enabling authentication of content, comprising computing a number of respective message authentication codes for the content, each respective message authentication code being computed using a respective group key associated with a group of devices suitable for accessing the content. Preferably for each of a plurality of sections of the content respective message authentication codes are computed using the respective group keys. Also a device suitable for accessing content and comprising means for authenticating the content, in which the means for authenticating are configured for computing a message authentication code for the content and for comparing the computed message authentication code against at least one of a plurality of recorded message authentication codes that are provided with the content. Also a system comprising a plurality of such devices. | |||||||||||
| 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, GT, 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, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW) Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM) European Patent Office (EPO) (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 (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). | |||||||||||
| Publication Language: | English (EN) |
| Filing Language: | English (EN) |
