System and methods for vehicle sharing

A secure vehicle sharing system including a computerized server connected to a wide area network (WAN) and executing software from memory, comprising:

• a mobile computerized security housing including;
• a front surface, a back surface for securely mounting on an outside surface of a vehicle, a top, bottom, right and left sides;
• an instance of the software executing from memory;
• a power source;
• a locking compartment;
• an interface, accessible on the WAN, provided by the software on the server, enabling users to register as a vehicle owner by uploading to a database, accessible to the server, at least identification of a mobile computerized security housing, identification of an owned vehicle, user profile and user financial data, and enabling users to register as a vehicle renter by uploading user profile data to the database, including at least identification and financial data;
• a computerized mobile client device carried at least by the vehicle renters, the computerized mobile client device enabled for wireless communication and connection to the WAN, the client device storing and executing an instance of the software from memory;
• wherein the server receives a request from the vehicle renter's computerized mobile client device to rent a vehicle, the server accesses the database and matches the request to one or more available registered vehicles located within a geographic area specified by the vehicle renter, the server sends results of the matching to the vehicle renter's computerized mobile client device and the vehicle renter selects an available registered vehicle causing the server to send to the computerized mobile client device of the vehicle renter location data enabling the vehicle renter to locate the selected registered vehicle, and security data enabling the vehicle renter to communicate the security data to the mobile computerized security housing mounted to the selected registered vehicle causing the mobile computerized security housing to unlock the locking compartment allowing access to a key or other item stored in the locking compartment.