Patent CA-3093718-A1 (CA)
Inventor: CROWLEY RICHARD
IPC: H04L9/14
Filed: 2019-06-06
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY  (PCT) (19) World Intellectual Property                1 11111 1 111111 11 111111 1 Organization International Bureau                                (10) International Publication Number (43) International Publication Date                   WO 2019/236905 Al 12 December 2019 (12.12.2019) WIPO I PCT (51) International Patent Classification:       (US). KINKEL, Nikolas; 500 Howard Street, San Francis-HO4L 9/08 (2006.01)      HO4L 9/32 (2006.01)    co, California 94105 (US). HO4L 9/14 (2006.01) (74) Agent: ZOTTOLA, Dana et al.; ALSTON & BIRD LLP, (21) International Application Number:    Bank of America Plaza, 101 South Tryon St., Suite 4000, PCT/U52019/035870    Charlotte, North Carolina 28280-4000 (US). (22) International Filing Date:    (81) Designated States (unless otherwise indicated, for every 06 June 2019 (06.06.2019)    kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (25) Filing Language:                     English CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, (26) Publication Language:                English    DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ED, EL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, (30) Priority Data: KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 62/681,5'78        06 June 2018 (06.06.2018)    US MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, (71) Applicant: SLACK TECHNOLOGIES, INC. [US/US];    OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 500 Howard Street, San Francisco, California 94105 (US).    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. (72) Inventors: CROWLEY, Richard; 500 Howard Street, San Francisco, California 94105 (US). DRUMMOND, Au- (84) Designated States (unless otherwise indicated, for every drei; 500 Howard Street, San Francisco, California 94105    kind of regional protection available): ARIPO (BW, GH, (US). FAIN, Jessica; 500 Howard Street, San Francis-    GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, co, California 94105 (US). JONES, Leah; 500 Howard    UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, Street, San Francisco, California 94105 (US). FRANK,    TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, Ilan; 500 Howard Street, San Francisco, California 94105    EE, ES, FI, FR, GB, GR, HR, HU, EE, IS, IT, LT, LU, LV, (54) Title: METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR ENCRYPTION KEY  MANAGEMENT ¨ WITHIN A GROUP-BASED COMMUNICATION SYSTEM   10113 ,[                                101C-1 101D  __________________________________________________ --Client Device 3 ==== ___________________________________________________ A 101A                         Client Dev ce 2             Dent Device 4 104                                     /    w Communications Nenniork Client Device N Client Device 1 Group-Based Communication System 1-1                      Group Based    ==a--              111--==d Communication                       = == Repository re) FIG. 1 (57) Abstract: Various embodiments are directed to systems and methods for encryption key management within a group-based com-munication platform. [Continued on next page]     WO 2019/236905 Al I11111 RINI II lIllIl OIH 11111 011MI I II ll 11111 0ll lHl IIH 11111 lH 11111111111 0l 1111 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). Declarations under Rule 4.17: ¨    as to the identity of the inventor (Rule 4.17(0 ¨    as to applicant's entitlement to apply for and be granted a patent (Rule 4.1700) Published: ¨    with international search report (Art. 21(3))