i use a number of programs that don't have a digital signature and they work fine - i guess its all about where you get your software from - it should be from trusted sources and not randomly from the internet
as for the digital certificates, looks like its a lucrative business for some, begging the question of its legality or real necessity:
The great digital certificate ripoff?
Verisign: $499.00
Thawte: $299.00
Comodo: $119.95
That seems an awful lot considering that all they appear to do is check a document (e.g. a scan of your certificate of incorporation), check your whois record, multiply a couple of large prime numbers and then send you a certificate file. Much of this process is (or should be) automated. No wonder the founder of Thawte could afford to be one of the first space tourists.
Code:
http://successfulsoftware.net/2008/02/27/the-great-digital-certificate-ripoff/
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