Questions on cryptography -- dotnet general

Nerd
5/29/2006 9:13:22 PM

I am trying cryptography in dotnet using the
System.Security.Cryptography namespaces.
I have a couple of questions

1. If I use SymmetricalAlgorithm RijndaelManaged as the algorithm and
if I
share the Key that I use with other applications that wants to decrypt
this. will they be able to decrypt the message?

I mean is the algorithm RijndaelManaged a universal algorithm?
Just by knowing the key used for encryption will I be able to decrypt
the message?

2. What is a IV(initialization vector). For decrypt a message, is it
necessary to know the IV that was used while encryption? Or just the
key is sufficient?

THanks in advance for the help

Brendan Green
5/30/2006 12:00:00 AM

Yes.

You'll need to use both the IV and the KEY to decrypt the message.

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dotnet general : Questions on cryptography