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.