What is Digital signature of a software?

[Sawantji]

Hi,
Anyone knows wht is a digital signature for a software stands for?
when i install some free softwares i get this warnig kind of thig from kaspersky saying the software do not have digital signature so what dose it mean & what m i supposed tpo do in such situation?

[Ian p]

Digital ID signature or certificate is an installed file resident on a computer validates who you are. Digital signatures are used by programs on the internet and local to the machines to confirm your identity to any third party concerned. Digital signatures have been confused with electronic signatures. Electronic signatures are scanned copies of a physical written signature.
For more information have a look at windowsecurity.com

[Emilia]

"digital signature" means the result of applying to specific information certain specific technical processes described below. The historical legal concept of "signature" is broader. It recognizes any mark made with the intention of authenticating the marked document.