Deriving confidence scores based on device sharing

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computing device of a first participant, to cause the computing device of the first participant to:

• determine sharing event data regarding a sharing event wherein the computer device of the first participant utilizes a secondary device of a second participant, the sharing event data including usage data regarding usage of the secondary device;
• send the sharing event data to a remote confidence server;
• receive from the remote confidence server a notification indicating an overall confidence score of the second participant based on the sharing event data and on multiple comparative confidence scores calculated for the second participant based on other sharing event data, wherein the overall confidence score is determined from a matrix of confidences scores of a plurality of participants, including the first participant and the second participant, wherein edges of the matrix represent individual comparative confidences scores between participants;
• and
• enable, by the computing device, a remote electronic device of the second participant access to a resource of the computing device of the first participant based on the notification.

A system comprising:

• a processor, a computer readable memory and a computer readable storage medium associated with a computing device;
• program instructions to receive sharing event data from a remote computing device in a comparative confidence environment, the sharing event data including usage data regarding the sharing of an electronic device between a first participant and a second participant during a sharing event;
• program instructions to calculate a comparative confidence score for the first participant and the second participant based on the sharing event data, wherein the comparative confidence score represents a level of trust between users;
• program instructions to generate a matrix of confidence scores of a plurality of participants, including the first participant and the second participant, wherein edges of the matrix represent individual comparative confidences scores between participants;
• program instructions to calculate an overall confidence score of the first participant based on the edges of the matrix;
• and
• program instructions to issue permissions to enable the first participant to gain access to an electronic device accessory of the second participant based on the comparative confidence score or the overall confidence score,
• wherein the program instructions are stored on the computer readable storage medium for execution by the processor via the computer readable memory.