Digital signatures are used to verify that electronic messages and data have come from the proper sender and to irrevocably certify that data was not tampered with or changed during transition from ...

A digital signature authenticates the sender of a message and provides the electronic equivalent of a tamper-proof seal that is broken if any data in the message were altered. Digital signatures use ...

Researchers at the Ruhr-University Bochum in Germany have figured out three different ways to forge digital signatures in PDF documents. The fakes will be treated as genuine on 21 of 22 desktop PDF ...