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A comment on Bitlock replaces your bike key with your phone. Parent comment

Re:Bitlock replaces your bike key with your phone by ewang1 on Tuesday October 01, 2013 @12:12AM (#6473992)
No data plan is needed. You can implement something similar to two factor auth tokens. Then the phones only need to know the correct token to present to the lock.
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Re:Bitlock replaces your bike key with your phone by cratib on Tuesday October 01, 2013 @03:56AM (#6474816)
Or public key crypto. You sign a message that grants your friends phone access; the lock verifies it.
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