How a digital signature works

Thursday, 12 August 2004, 8:56 AM EST

A technology called public key cryptography makes it possible for you to make sure that the publisher of any piece of software that claims to be from Microsoft (MSFT) or any other publisher really came from there. It has the added benefit of insuring that the contents weren't maliciously altered or damaged in transmission. Here's how it works.

The publisher first has to obtain a digital certificate from a recognized "certificate authority" or CA [VeriSign (VRSN) is the largest and best known CA in the U.S.]. The publisher receives a private and a public key, each of which is a long number of about 300 digits. These are used to create a digital signature for each program.

By Stephen H. Wildstrom at MSNBC.

[ Read more ]




Spotlight

Patching: The least understood line of defense

Posted on 29 August 2014.  |  How many end users, indeed how many IT pros, truly get patching? Sure, many of us see Windows install updates when we shut down our PC and think all is well. Itís not.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Tue, Sep 2nd
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //