Janne Varjus - Digital signature in insecure environments

Due to current legislation the digital signatures can be as
valid as the hand written signatures. If the signing environment
is compromised there is no way for the signatory to
know what he/she is signing. Even if signing process is secure,
data can be switched before signing by malware. Home
computers are usually in a risk to get compromised by virus
attacks and computers elsewhere can be untrusted. If computers
in a risk cannot be used for signing it greatly reduces
the applications of the digital signatures. To solve this issue
hardware and software approaches have been developed that
try to minimize the risks.