Secure Notarization of Paper Text Documents

Matthias Ruhl, Marshall Bern and David Goldberg

ACM-SIAM Symposium on Discrete Algorithms (SODA '01)
Washington D.C., January 2001

[Postscript, 32KB]

[PDF, 29KB]


We present a method to notarize a paper document. This method computes a set of features from the page, inputs these features into a hash function, digitally signs the output, and then prints the resulting signature on the page. The notarized document is self-contained: verification does not require reference to online information.

Back to publications