Forged, Anonymous and Suspect Documents

Detecting documents forged by printing and copying

This paper describes a method to distinguish documents produced by laser printers, inkjet printers, and electrostatic copiers, three commonly used document creation devices. The proposed approach can distinguish between documents produced by these sources based on features extracted from the characters in the documents. Hence, it can also be used to detect tampered documents produced by a mixtu...

History-Based Signature or How to Trust Anonymous Documents

This paper tackles the following problem: how to decide whether data are trustworthy when their originator wants to remain anonymous? More and more documents are available digitally and it is necessary to have information about their author in order to evaluate the accuracy of those data. Digital signatures and identity certificates are generally used for this purpose. However, trust is not alw...

On the Forged Dice

It is a well{known exercise in elementary probability that it is impossible to forge two ordinary dice with numbers 1;. . .; 6 in such a way that when one throws both and takes the sum one gets the numbers 2; 3;. . .; 12 all with the same probability. preceding assertion is just the statement that for m = 10, k 1 = k 2 = 5 there are no such probabilities. It will be shown how the k 1 ;. . .; k ...

DNS Resilience against Forged

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. license-info) in effect on the date of publication of this do...

Suspect cubic diamond "impact" proxy and a suspect lonsdaleite identification.