Determining trust data for devices in a network

A non-transitory computer-readable storage medium encoded with instructions, wherein the instructions when executed comprise:

• detecting at a first device, a plurality of interactions between the first device and a second device;
• assigning, at the first device, respective ratings of the plurality of interactions;
• calculating, at the first device, an internal trust that the first device has for the second device based on the respective ratings and respective times since an occurrence of the plurality of interactions, wherein the calculating, at the first device, the internal trust that the first device has for the second device based on the respective ratings and respective times since the occurrence of the plurality of interactions further comprises adding an initial trust value that the first device has for an unknown device plus a sum of the respective ratings of the plurality of interactions, divided by the respective times since the occurrence of the plurality of interactions, raised to an exponent of a time dampening constant;
• receiving, at the first device, respective trust data from a plurality of devices;
• calculating, at the first device, a community trust for the second device based on the respective trust data and respective internal trusts that the first device has for the plurality of devices;
• calculating, at the first device, a total trust that the first device has for the second device based on the community trust and the internal trust that the first device has for the second device;
• and
• if the total trust is less than a minimum threshold, disallowing, at the first device, a second interaction between the first device and the second device, wherein the second interaction is subsequent to the plurality of interactions.

A computer system, comprising:

• a processor;
• and
• memory communicatively coupled to the processor, wherein the memory is encoded with instructions, wherein the instructions when executed on the processor comprise:
• detecting at a first device, a plurality of interactions between the first device and a second device,
• assigning, at the first device, respective ratings of the plurality of interactions,
• calculating, at the first device, an internal trust that the first device has for the second device based on the respective ratings and respective times since an occurrence of the plurality of interactions, wherein the calculating, at the first device, the internal trust that the first device has for the second device based on the respective ratings and respective times since the occurrence of the plurality of interactions further comprises adding an initial trust value that the first device has for an unknown device plus a sum of the respective ratings of the plurality of interactions, divided by the respective times since the occurrence of the plurality of interactions, raised to an exponent of a time dampening constant,
• receiving, at the first device, respective trust data from a plurality of devices,
• calculating, at the first device, a community trust for the second device based on the respective trust data and respective internal trusts that the first device has for the plurality of devices,
• calculating, at the first device, a total trust that the first device has for the second device based on the community trust and the internal trust that the first device has for the second device, and
• if the total trust is less than a minimum threshold, disallowing, at the first device, a second interaction between the first device and the second device, wherein the second interaction is subsequent to the plurality of interactions.