Increased security using dynamic watermarking

1. A method comprising:

determining a negotiated watermarking algorithm that identifies at least one location on a web page for a placed dynamic watermark, wherein the placed dynamic watermark comprises digital information hidden in a noise-tolerant medium such that the digital information is hidden from a user's perception, wherein the at least one location varies based on the negotiated watermarking algorithm determined for each initiated web communication, and wherein the negotiated watermarking algorithm identifies at least one of:

an algorithm for creating the digital information corresponding to the placed dynamic watermark;

a number of potential watermark locations on the web page;

a location on the web page of each potential watermark;

a number of placed dynamic watermarks on the web page; and

a location on the web page of each of the placed dynamic watermarks;

requesting the web page;

receiving the web page; and

verifying the authenticity of the web page using the negotiated watermarking algorithm prior to displaying of the web page.

2. The method of claim 1 further comprising negotiating a unique key that identifies a client.

3. The method of claim 2 , wherein requesting the web page comprises providing the unique key in a request for the web page.

4. The method of claim 1 , wherein a potential dynamic watermark location is contained within an image on the requested web page.

5. The method of claim 1 , wherein a number of placed dynamic watermarks on the web page is less than or equal to a number of potential watermark locations.

6. The method of claim 1 , wherein verifying the web page authenticity comprises comparing a value of the placed dynamic watermark with an expected value for the placed dynamic watermark.

7. The method of claim 1 , further comprising continuing a web communication if the web page is determined to be authentic.

8. The method of claim 1 , further comprising initiating a defensive action if the web page is not authentic.

9. A method comprising:

determining a negotiated watermarking algorithm that identifies at least one location on a web page for a placed dynamic watermark, wherein the placed dynamic watermark comprises digital information hidden in a noise-tolerant medium such that the digital information is hidden from a user's perception, and wherein the negotiated watermarking algorithm identifies at least one of:

an algorithm for creating the digital information corresponding to the placed dynamic watermark;

a number of potential watermark locations on the web page;

a location on the web page of each potential watermark;

a number of placed dynamic watermarks on the web page; and

a location on the web page of each of the placed dynamic watermarks;

receiving, from a client, a request for a web page;

identifying the client;

generating the requested web page using the negotiated watermarking algorithm providing a generated web page; and

providing the generated web page to the client.

10. The method of claim 9 , further comprising negotiating a unique key that identifies the client.

11. The method of claim 10 , wherein identifying the client comprises receiving the unique key in the request for the web page.

12. The method of claim 9 , wherein a potential watermark location is contained within an image on the requested web page.

13. The method of claim 9 , wherein a number of placed dynamic watermarks on the web page is less than or equal to a number of potential watermark locations.

14. A computer program product comprising:

one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising instructions to:

determine a negotiated watermarking algorithm that identifies at least one location on a web page for a placed dynamic watermark, wherein the placed dynamic watermark comprises digital information hidden in a noise-tolerant medium such that the digital information is hidden from a user's perception, wherein the at least one location varies based on the negotiated watermarking algorithm determined for each initiated web communication, and wherein the negotiated watermarking algorithm identifies at least one of:

an algorithm for creating the digital information corresponding to the placed dynamic watermark;

a number of potential watermark locations on the web page;

a location on the web page of each potential watermark;

a number of placed dynamic watermarks on the web page; and

a location on the web page of each of the placed dynamic watermarks;

request the web page;

receive the web page; and

verify the authenticity of the web page using the negotiated watermarking algorithm prior to displaying of the web page.

15. The computer program product of claim 14 , wherein a potential watermark location is contained within an image on the requested web page.

16. The computer program product of claim 14 , wherein verifying the web page authenticity comprises comparing a value of the placed dynamic watermark with an expected value for the placed dynamic watermark.

17. The computer program product of claim 14 , wherein the program instructions contain instructions to initiate a defensive action if the web page is not authentic.