Methods and Systems for Digital Authentication Using Digitally Signed Images
AssigneeGlobal Crypto Systems
InventorTodd A. Merrill
Life of this patent
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Abstract
Various systems, methods, and programs embodied in computer-readable mediums are provided for digital authentication using digitally signed images. In one representative embodiment, a method comprising: extracting a first image portion from an image selected by a first party, the first image portion including a first encoded part of an second party digital signature; obtaining a second image portion associated with the first image portion, the second image portion including a second encoded part of the second party digital signature; decoding the first and second encoded parts of the second party digital signature; and confirming validity of the second party digital signature based upon a second party public key.
Claims40
A method, comprising:
- encoding a first party digital signature in a first signature region of a first image and encoding a second party digital signature in a second signature region of the first image to produce a first encoded image;
- and
- separating the first encoded image into a first portion and a second portion, the first portion including a first part of the first party digital signature and a first part of the second party digital signature and the second portion including a second part of the first party digital signature and a second part of the second party digital signature.
A method, comprising:
- encoding N digital signatures in N corresponding signature regions of a first image, each digital signature associated with at least one of N parties;
- and
- separating the first encoded image into M portions, each portion including a first part of at least one of the N digital signatures.
A method, comprising:
- extracting a first image portion from an image selected by a first party, the first image portion including a first encoded part of an second party digital signature;
- obtaining a second image portion associated with the first image portion, the second image portion including a second encoded part of the second party digital signature;
- decoding the first and second encoded parts of the second party digital signature;
- and
- confirming validity of the second party digital signature based upon a second party public key.
Dependencies are inferred from the claim text.