Just another tech site

4. Digital Signature


A digital signature is created by a combination of a message Hash and private/public key encription.

A digital signature guarantees two things:
1. if the decrypted hash sum matches the hash sum of the plaintext, the plaintext received corresponds to the plaintext sent by the sender
2. if the hash sum can be decrypted with Sender A public key, it proves the document was indeed sent by Alice (actually, it only proves the document was sent by someone who has Sender A private key, which we take for granted is Sender A).[2]


[1] http://www.x500standard.com/index.php?n=X509.X509Overview
[2] http://www.carillon.ca/library/pkitutorial.php


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

Tag Cloud

%d bloggers like this: