4 ms·
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 loc
by ewang1 13y ago
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.
- cratib 13y agoOr public key crypto. You sign a message that grants your friends phone access; the lock verifies it.