Cryptographer's doubts about Ozzie's CLEAR key-escrow system: securing private keys at OEMs and disabling a phone once law enforcement accesses it are hard (Matthew Green/A Few Thoughts ...)

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Matthew Green / A Few Thoughts on Cryptographic Engineering:
Cryptographer's doubts about Ozzie's CLEAR key-escrow system: securing private keys at OEMs and disabling a phone once law enforcement accesses it are hard  —  Yesterday I happened upon a Wired piece by Steven Levy that covers Ray Ozzie's proposal for “CLEAR”.