Go Back   Computer Forums > General Computing > Cyber Safety and Computer Security
Click Here to Login
Join Computer forums Today

Thread Tools Search this Thread Display Modes
Old 05-23-2005, 01:50 AM   #1
Beta Member
Join Date: May 2005
Posts: 1
Question pki puzzle

hey guys:
i have study the system security for a couple of years,but the theory of how pki work truly puzzle me even today.
it says in the pki,that the CA issue a certificate for certain objective to a user as a public key,for security issues particularly including data confidentiality and integrity when transmitted over the insecure network,using by no matter exactly which software.
for confidentiality:
the sender of a piece of data recieve the public key from recipient
and use that for encryption using a open algorithm which is well
known,while the recipient having received the data,use his private key
to reverse the data ,which is originally encrypted by the his own
key,using his private key.
so what is the trick in the internal encrypt using public key of his
own while decrypt using his private key.

when turning to integrity whose damage,according to reference are
usually done by man-in-the-middle:
the sender send the data of data signature using his private key
to the recipient,who in turn validate that the data is from the data
the source that claims himself to be the intended sender.
so what is that trick.

in the layer of system adminstrator,do i need to know the detail or do
i simply see it as a black box
davidwong is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -5. The time now is 06:36 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0