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The Security Feature of Code Signing Certificates

What's Code Signing Certificate?

In order to determine that applications and dynamic articles (such as ActiveX controls) are trustworthy or not, the first question is always to validate or authenticate that the code or content, such as the publisher and author, should in reality be trusted. A fruitful way to verify the authentication of its author or publisher is Code Signing Certificate. Normally the authoring programmer supplies a pc software program or content that's known and trusted. Now using situation a Code Signing Certificate will authenticate mcdougal and publisher for their application and content using digital mechanism.

Just how to Handle Code Signing Certificate?

Code Signing Certificate rely on an electronic signature technology, which is issued by an internationally trusted 3rd party called Certificate Authority (CA). A Code Signing Certificate from a dependable Certificate Authority (CA) will identify the program and publisher. For example, VeriSign / Symantec and Thawte utilize digital IDs for application designers. When a programmer applies for an electronic ID, it is necessary to offer confirmation of identification. A public/private key couple is produced once the certificate is issued. The main element remains on the requester's computer and is never sent to the CA and shouldn't be distributed to anyone. The community key is presented to the CA with the certificate.

Once the certificate is issued, the developer uses the private key associated with this group key to sign this content, code, or script. When web users download the signed code, they get yourself a copy of the certificate to authenticate the identity of the publisher/author Code Signing Certificate. The Browser verifies the digital signature, and the user trusts that the code did indeed originate from that one developer.

Aftereffects of Code Signing Certificate once it is issued

1. The code is put via a one-way hash function. This creates a "digest" of fixed length.
2. The developer's private key can be used to encrypt this digest.
3. The digest is combined with the certificate and hash algorithm to create a signature block.
4. The signature block is inserted to the portable executable file.

Steps of Authentication Process When Code is Downloaded From Another User

1. The certificate is examined and the developer's public key is obtained from the CA.
2. The digest is then decrypted with the public key.
3. The exact same hash algorithm which were used to produce the digest is run using the code again, to create a second digest.
4. The next digest is set alongside the original.