Invisible electronic signature
First Claim
Patent Images
1. A method for producing an invisible electronic signature, which method comprises the steps of:
- inputting the electronic signature to be embedded into a spinning encoder and generating using spinning codes encoded information whose length is a multiple of the original electronic signature;
generating a random number sequence using cross encoding for permuting the encoded information, the seed of the random numbers being a first key;
selecting a pixel of a host image H using a random number generator as an information embedding point of the encoded information, the seed of the random number generator being a second key, and embedding the encoded information into the B channel of the pixel of the host image;
wherein the host image H is an image of m×
n pixels and the electronic signature to be embedded is information W with a size L, both the host image H and the embedded information W being expressed as;
2 Assignments
0 Petitions
Accused Products
Abstract
A method of producing an invisible electronic signature insusceptible to human damages or anamorphous compression. This new electronic signature technology uses the pixel contrast, error propagation, channel coding and cross encoding techniques. Once the electronic signature is embedded, it can still be recovered and recognized even after the generated image is damaged by human errors or anamorphous compression.
10 Citations
10 Claims
-
1. A method for producing an invisible electronic signature, which method comprises the steps of:
-
inputting the electronic signature to be embedded into a spinning encoder and generating using spinning codes encoded information whose length is a multiple of the original electronic signature;
generating a random number sequence using cross encoding for permuting the encoded information, the seed of the random numbers being a first key;
selecting a pixel of a host image H using a random number generator as an information embedding point of the encoded information, the seed of the random number generator being a second key, and embedding the encoded information into the B channel of the pixel of the host image;
wherein the host image H is an image of m×
n pixels and the electronic signature to be embedded is information W with a size L, both the host image H and the embedded information W being expressed as;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeNational Chung-Shan Institute of Science and Technology
-
Original AssigneeChung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
-
InventorsHsu, Tao-I, Wu, Kuang-Shyr
-
Primary Examiner(s)Smithers, Matthew
-
Assistant Examiner(s)NORRIS, TREMAYNE M
-
Application NumberUS09/639,675Time in Patent Office1,545 DaysField of Search382/232, 382/166, 713/176, 370/335US Class Current713/176CPC Class CodesG06T 1/0057 Compression invariant water...
