OggS " qj OpusHead8 OggS " MpOpusTags Lavf56.40.101 LANGUAGE=eng HANDLER_NAME=SoundHandler ENCODER=Lavc56.60.100 libopus MAJOR_BRAND=isom MINOR_VERSION=512" COMPATIBLE_BRANDS=isomiso2avc1mp41 AUTHOR=Matthew Garrett GENRE=presentation. TITLE=Building a secure boot chain to userlandS COPYRIGHT=Licensed to the public under https://creativecommons.org/licenses/by/4.0 ALBUM=asg2017 ARTIST=Matthew Garrett description=Secure boot as it currently exists in desktop Linux distributions is sufficient to verify that the bootloader and kernel have not been tampered with, but generally does nothing to ensure that userland is secure. How can we fix that?OggS " g1a5^}E^B@dmTD87XPվ^:6<*Aߍŏ%-TJe$ +N_lr]L3JF8J +2v2߱1}rWW%Cz^mzk4\JpCxabdHd "wZl^tgG)\1戂)eK6xߍń5wGj' 8@:sMm{7צR7I*: 5T]ك*7zјLϪAwu_ƴE5!"#Ҟ53k] $?#r|4uLQeT_qq\8Ϛ@a#haGxVdE)pzFK.VI7y^z}r.m?M3lUS24*LnƝ(L'΄rV%=dq'肶>xE٨яy+cDGa9iCÆ"{Y,~Qy7vC.f OKz4;>,rِ;YRsڣ{4>Xia6(fc+JREVU"_ hs-8)uqE5K-^>HP e{]y=zʇt1xॳ`K{@q8M2|=fAxu2MN21JdD0 p$ߛwJuZf~^YΏwBXX1K>:G 7ʨp24ʀ<'3b%tA&FT1Q9b$EUҫ/ڀ^g|_S/ű?On!y{Poq+EM֡q_tM\ʢ2_t?oϜḱ#RG{Z$ 쎷oJ9XI7CD4zOYiJ#qiX