Hermes is a device that fits into your bicycle frame. Through communication with a mounted lock it can lock and unlock your bike when you leave or enter its proximity, no more forgetting to lock your bicycle. It also communicates with you when your bike is being moved, or at worst stolen. If you wish Hermes also communicates towards social media, for instance a community built up around bicycle theft, to help you get your bicycle back. Hermes tracks the location of your bicycle and relays that to you and people involved to facilitate finding and tracking where your bicycle has disappeared. It could also be used as a tool for patrolling police to catch bicycle thieves and thus nip bicycle theft in the bud instead of trying to solve the crime long after the fact. By using Hermes you don't have to worry about what happens with your bicycle once you have left it.