Demystifying phone unlocking tools: A technical overview

Does the whole "Lock Screen is just UI" thing also hold true on Samsung phones where they use Knox? Samsung phones seem to have a long delay after the PIN is entered in for the first time.

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One would think agencies like the NSA, whose mission is nominally to improve the communications security of Americans, would be helping Apple and Google with patching the 0days that foreign companies like Cellebrite are hoarding.

Instead it seems like everyone is teaming up to fuck over the average person. What a great world we live in.