Quadrox QGuard User Manual - Manual (Page 161)

QGuard User Manual 161
Version 4.9 Series
Appendix B
You can manually verify the digital signature by using either the .eml or the .p7m format.
 Signatures in .eml format can be viewed by MS Outlook Express. To do that, double
click on the .eml file you just saved, Outlook Express opens the signature and you will
see the following screen.
Digital Signature Screen
 Signatures in .p7m format can be viewed by a p7mViewer or another relevant viewer
( http://www.cryptigo.com ). To do that, install the viewer and double click on the .p7m
file you just saved. The p7mViewer opens the signature and you will see a screen,
which is similar to the one that is above.
Being able to open a digital signature file and see the information inside it implies that it can
be decoded (and thus was generated) by the certificate. This means that the signature file itself
cannot have been tampered with.
The digital signature generated by Quadrox software contains the following
information:
 The filename of the signed movie.
 Signed movie hash type and value. Together, filename and hash value
indisputably link the signature to the movie file.
 The time at which the video was recorded.
 The name of the recorder where video was recorded and exported.