Operation Manual
23
9.3.2
Getting Public Key
The
Get key
button is used for creating public key file on your PC. Public key is needed for audio recording
authenticity verification using digital signature. A public key (public and private), generated with
Manager
can be obtained by one OS user.
Click
Get key
(Figure 7). In the
Save as
dialog, specify folder you want to save file to.
The default public key name is
PublicKey
. You can change file name.
9.3.3
Digital Signature Verification
The
Verify sign
button allows you to verify recording authenticity thus, to make sure audio file has not been
altered after being copied to PC hard drive.
If a digital signature has been created for a recording (see Section 9.5.7), you can verify its authenticity by
analyzing this recording and digital signature file. To perform verification, apart from audio recording, you
need a digital signature file and a public key file. You are recommended locating public key files
(.key)
, digital
signature files
(.dsg)
and audio recordings (
.wav
,
.rng
) in the same folder (Figure 9).
Figure 9: Files prepared for verification.
Figure 10: Specifying access paths.
To start verification, click
Verify sign
(Figure 7).
In the
Verify digital sign
dialog (Figure 10), specify assess
path to the file, its digital signature and public key files. Click
Verify
.
Verification results are displayed in the dialog, as shown on
Figure 11.
Figure 11: Verification results.
If a file has been modified, you will see
the following message:
File has been
changed.
If a file has not been modified, the
following message will appear:
File is
authentic.
The
Get key
and
Verify sign
options are always accessible, which allows you to perform
verification without connecting the device to PC.