Ask the Expert

How can I set up my network to distinguish between encrypted and un-encrypted packets?

I am involved in providing a security solution for an organization. We are using a customized encryption algorithm and, as suggested by you, we are going for a filter driver under a Win2000 environment, as LSP just below the application layer for deploying the encryption algorithm.

Now we have one problem: In our network we have two kinds of packets. Some encrypted & some un-encrypted packets. Now, when the LSP receives the packet from the Net, it has to check out whether it is encrypted or not. If it is encrypted, only then does it have to decrypt. Otherwise, it should be sent as it is to the above layers. How do I distinguish the encrypted & unencrypted packets? Can we add some header kind of thing to each packet? Please suggest the solution for this problem as early as possible. My work is stopped because of this problem. Thank you so much.

Since I've not seen your overall design, it is hard for me to give a good answer. However, it seems to me you can add some information in the packet header to denote that the following data is encrypted or not.

This was first published in April 2002

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: