Method for authenticating a hash of a data packet from collected context data based on a hash distance generation step, first authentication device, second authentication device, and authentication system

A first authentication device, wherein the first authentication device is configured to:

• collect at least one context data element, based on a predetermined authentication policy;
• constitute a data packet, based on the at least one collected context data element;
• generate a hash, by using a predetermined hash type algorithm and the data packet, as input to the predetermined hash type algorithm;
• and
• send the generated hash to a second authentication device;
• wherein said at least one context data element is a captured image represented as a string of bits with a fixed length for constituting said data packet, and wherein said hash is a byte stream generated from said string of bits representing said captured image for said data packet.

A second authentication device, wherein the second authentication device is configured to:

• receive a generated hash;
• generate a hash distance between the generated hash and a predetermined reference hash;
• and
• authenticate successfully or not based on the generated hash distance.

An authentication system, comprising a first authentication device and at least one second authentication device, wherein the first authentication device is configured to:

• collect at least one context data element, based on a predetermined authentication policy;
• constitute a data packet, based on the at least one collected context data element;
• generate a hash, by using a predetermined hash type algorithm and the data packet, as input to the predetermined hash type algorithm;
• and
• send to the second authentication device, the generated hash;
• and wherein the second authentication device is configured to:
• receive the generated hash from the first device;
• generate a hash distance between the generated hash and a predetermined reference hash;
• and
• authenticate successfully or not based on the generated hash distance;
• wherein said at least one context data element is a captured image represented as a string of bits with a fixed length for constituting said data packet, and wherein said hash is a byte stream generated from said string of bits representing said captured image for said data packet.