Abstract: In particular embodiments, a computer server may receive information regarding an event proposal from an event organizer, where the information includes an identification of multiple invitees, and where the information is missing one or more significant details of the event proposal. The computer server may send the information regarding the event proposal to one or more client devices, where each of the client devices is associated with one of the invitees. The computer server may receive feedback regarding the event proposal from at least one of the invitees, and based on the received feedback, the computer server may determine at least one of the missing significant details of the event proposal. The computer server may send information regarding final details of an event based on the event proposal to one or more of the client devices associated with the invitees.

Abstract: The disclosed embodiments include computerized methods, systems, and devices, including computer programs encoded on a computer storage medium, for device authentication. For example, the resource device may generate and maintain master access tokens, which may be transmitted to a computing system. The computing system may receive, from a device of an owner of the resource device, data granting a client device limited access to the resource device in accordance with various access restrictions. The computing system may generate and provide to the client device a limited version of the master access token that specifies the access restrictions. The client device may present the local access token to the resource device over a direct wireless connection, and the resource device may verify the token and grant the requested access without communication with the computing system.

Abstract: In particular embodiments, a computer server may receive information regarding an event proposal from an event organizer, where the information includes an identification of multiple invitees, and where the information is missing one or more significant details of the event proposal. The computer server may send the information regarding the event proposal to one or more client devices, where each of the client devices is associated with one of the invitees. The computer server may receive feedback regarding the event proposal from at least one of the invitees, and based on the received feedback, the computer server may determine at least one of the missing significant details of the event proposal. The computer server may send information regarding final details of an event based on the event proposal to one or more of the client devices associated with the invitees.