What a great idea! For a thief to really profit from stealing this bike they have to do extra work. Plus they have to be willing to do this extra work while stealing the bike. They can’t just cut a chain and go.
The students built the first working prototype bike, code-named the Yerka Project. The bike’s down tube at the bottom of the frame splits apart and wraps around an object such as a post or tree, and the bike’s seat post is then slotted through both ends of the down tube to complete the lock. Once you’ve got everything in place, you simply take out the lock pin on the end of the down tube to seal the lock. The whole process takes less than 20 seconds, letting you be on your way in almost no time.
Clearly the any lock could be broken at some point but if the lock is in the seat post, it is very protected. If the Yerka bike makes the post not anchored to the frame portion then the post just spins if someone tries to break the lock with leverage.