SG11201907009VA - Method and apparatus for generating a cover image for steganography - Google Patents

Abstract

TAPi 116 114 1 , yis 120 / FIG. 1 100 1-1 00 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 09 August 2018 (09.08.2018) WIPO I PCT omit IIl °nolo milli Oil OH mom° oimIE (10) International Publication Number WO 2018/142216 Al (51) International Patent Classification: GO9C 5/00 (2006.01) HO4K 1/00 (2006.01) G06T 1/00 (2006.01) H04L 9/00 (2006.01) (21) International Application Number: PCT/IB2018/000144 (22) International Filing Date: 31 January 2018 (31.01.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 10201700761R 31 January 2017 (31.01.2017) SG (71) Applicant: AGENCY FOR SCIENCE, TECHNOLO- GY AND RESEARCH [SG/SG]; 1 Fusionopolis Way, #20-10, Connexis North Tower, Singapore 138632 (SG). (72) Inventors: ZHENG, Lilei; c/o Pkm, Institute For Info- Comm Research, 1 Fusionopolis Way, #21-01, Connexis South Tower, Singapore 138632 (SG). ZHANG, Ying; c/ o Pkm, Institute For Infocomm Research, 1 Fusionopolis Way, #21-01, Connexis South Tower, Singapore 138632 (SG). THING, Vrizlynn Ling Ling; c/o Pkm, Institute For Infocomm Research, 1 Fusionopolis Way, #21-01, Connex- is South Tower, Singapore 138632 (SG). (74) Agent: VIERING, JENTSCHURA & PARTNER LLP; P.O. Box 1088, Rochor Post Office, Rochor Road, Singa- pore 911833 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (54) Title: METHOD AND APPARATUS FOR GENERATING A COVER IMAGE FOR STEGANOGRAPHY (57) : A method and an apparatus for generating cover images for steganography are provided. The steganographic framework is designed based on an image generation system. The apparatus may encode a message to obtain a binary sequence. The apparatus may obtain a plurality of binary segments of a particular length based on the binary sequence. For each binary segment of the plurality of binary segments, the apparatus may select an image of a semantic content (e.g., a numeral digit) from a dictionary of images of random semantic contents (e.g., random numeral digits) based on the binary segment. The apparatus may combine the selected images to form at least a portion of a cover image denoting a combination of the semantic contents of the selected images (e.g., a plurality of numeral digits). [Continued on next page] WO 2018/142216 Al MIDEDIMOMOIDEIREEMOMMIEHHOIROMEEN MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) with information concerning incorporation by reference of missing parts and/or elements (Rule 20.6)