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Secret-Key Encryption in .NET CF

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Wan Zeng

Hi, I am learning data encryption, and I have couple of quesitons need
some immediate help. Thanks in advance.

1. Amond all the Secret-Key Encryption methods implimented in .NET
framework, I think Rijndael is the best to use. Can anyone verify
this for me?

2. I understand the System.Security.Cryptography is not available in
MS .NET CF. I found OpenNETCF implimented similar functionalities,
but it seemes Rijndael is not completely impliment? Is this true?
otherwise, can anyone provide a snipet of the sample code on how to
use Rijndael implimented in OpenNETCF?

Any help is appreciated. Thanks.

Wan

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casey chesnut

Rijndael is not currently in OpenNETCF.
i will put out an article about Rijndeal in CF in a couple weeks.
(also, Rijndael will be in CF v2 for Whidbey)
the next best one is TripleDES.

use it something like this:
TripleDESCryptoServiceProvider tdcsp = new TripleDESCryptoServiceProvider();
//set a 24 byte key (or use random)
//the IV is 8 bytes (you might need to set that to 8 random bytes)
tdcsp.Key = sharedKey;
byte [] cipher = tdcsp.EncryptValue(data);
byte [] clear = tdcsp.DecryptValue(cipher);

Thanks,
casey
http://www.brains-N-brawn.com

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Wan Zeng

Thanks Casey, for clarigy this for me. and your sample code.

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	System.Security.Cryptography.TripleDES
	System.Security.Cryptography.TripleDESCryptoServiceProvider

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