Methods and systems for preventing unauthorized disclosure of secure information using image fingerprinting

A system to prevent unauthorized disclosure of secure information outside a given organization, the computer-implemented system comprising:

• a processor;
• a memory;
• a processing component configured to:
• receive a first image that a user desires to transmit outside of the given organization;
• generate a first set of fingerprints for the first image, wherein each fingerprint of the first set of fingerprints is generated using point vectors computed from feature points identified from the first image;
• determine whether any of the first set of fingerprints is identical to any of a plurality of registered fingerprints stored in a fingerprint database communicably coupled to the system;
• wherein the fingerprint database comprises at least a portion of the plurality of registered fingerprints for secure images of the given organization;
• and
• wherein each fingerprint of the plurality of registered fingerprints is generated using point vectors computed from feature points identified from each secure image;
• and
• take a security action when any of the first set of fingerprints is identical to any of the plurality of registered fingerprints,
• wherein, in the generation of each fingerprint of the first set of fingerprints, the processing component is further configured to:
• select a first feature point in the first image;
• select a plurality of neighborhood feature points closest in distance to the first feature point, wherein a least distant feature point, measured relative to the first feature point, of the plurality of neighborhood feature points is designated as an anchor point;
• generate the plurality of point vectors, each point vector computed based on distance and angle between the particular neighborhood feature point and the first feature point, wherein the distance and angle are computed relative to the anchor point;
• and
• aggregate the plurality of point vectors to generate a fingerprint corresponding to the first feature point.

A computer-implemented method for preventing unauthorized disclosure of secure information, the computer-implemented method comprising:

• storing a plurality of registered fingerprints for secure images of a given organization, wherein each of the plurality of registered fingerprints is generated using a plurality of point vectors computed from feature points identified from each secure image;
• receiving a first image that a user desires to transmit outside of the given organization;
• generating a first set of fingerprints for the first image, wherein the generation of each fingerprint of the first set of fingerprints is identical to the generation of each registered fingerprint of the plurality of registered fingerprints;
• determining whether any of the first set of fingerprints is identical to any of the plurality of registered fingerprints;
• and
• taking a security action when the first fingerprint is identical to any of the plurality of secure text fingerprints,
• wherein the generation of each fingerprint of the first set of fingerprints includes:
• selecting a first feature point in the first image;
• identifying a plurality of neighborhood feature points closest in distance to the first feature point, wherein the plurality of neighborhood feature points closest in distance to the first feature point includes a P-neighborhood, the P-neighborhood including P number of neighborhood feature points closest in distance to the first feature point;
• generating the plurality of point vectors, each point vector computed based on distance and angle between a particular neighborhood feature point and the first feature point;
• and
• aggregating the plurality of point vectors to generate a fingerprint corresponding to the first feature point;
• and
• designating as an anchor point a least distant feature point, the least distant feature point being a specific feature point closest to the first feature point within the P-neighborhood.