System, device, and method of managing trustworthiness of electronic devices

A computer server comprising:

• a trustworthiness query receiver to receive a trustworthiness query message, incoming from a remote querying device, with regard to trustworthiness of a remote target device;
• a device parameters receiver to receive a set of values that correspond to parameters of said remote target device;
• a trustworthiness report generator to analyze said set of parameters and to generate a trustworthiness report pertaining to said remote target device;
• a layer constructor logic unit to construct multiple layers of data in said trustworthiness report;
• wherein the layer constructor logic unit is (i) to construct in said trustworthiness report a first data-layer which indicates that for a first period of time, a trustworthiness score of said remote target device or a particular component thereof is a first score-value;
• and (ii) to construct in said trustworthiness report a second data-layer which indicates that for a second period of time, which is subsequent to said first period of time, the trustworthiness score of said remote target device or said particular component thereof is a second score-value which is smaller than said first score-value.

A computerized querying device comprising:

• a receiver able to receive data from a remote target device;
• a trustworthiness query transmitter to transmit, to a remote trust-management server, a trustworthiness query message pertaining to said remote target device;
• wherein said receiver is to receive, in response to said query message, an incoming trustworthiness report comprising one or more trustworthiness indicators pertaining to said remote target device;
• a freshness requester logic unit to insert into said trustworthiness query message an indicator that a freshly-measured non-cached trustworthiness report is requested to be transmitted back to said computerized querying device in response to said trustworthiness query message.

A computerized querying device, comprising:

• a receiver to receive data from a remote target device;
• a trustworthiness query transmitter to transmit, to a remote trust-management server, a trustworthiness query message pertaining to said remote target device;
• wherein said receiver is to receive, in response to said query message, an incoming trustworthiness report comprising one or more trustworthiness indicators pertaining to said remote target device;
• an anonymizing logic unit to anonymize the identity of said remote target device from being known to said remote trust-management server;
• wherein said anonymizing logic unit is to replace (a) an original unique identifier of said remote target device, with (b) a fake unique identifier that said anonymizing logic unit selects from a pre-defined name-space of unique identifiers.