Is lock/unlock going to use some kind of OTP, or would the same communication happen over BT everytime? Just thinking about how easily this could be cracked by malicious people near you and your bike.
Even though Bruce Schneier could probably break that lock just by looking at it, he's probably not going to become a bike thief.
A. Spend $2 on a bolt cutter.
B. Spend hundreds of dollars on technical equipment in order to potentially be able to unlock a very unusual type of lock that you could have gotten to with option A anyway.
C would be a popular option if this type of lock was common and had vulnerabilities.
As a side note, I have PhD in embedded system security, although most of these things are crypto 101.