Coding Horror: Encryption for Dummies

April 18, 2005

Encryption for Dummies

I just posted a new article on CodeProject, .NET Encryption Simplified. In my spare time over the last 6 months, I've delved deeper and deeper into the System.Security.Cryptography classes. And you know what I learned? Cryptography is hard.

Anyway, I now have a heavily documented wrapper class that I feel pretty good about. And a much deeper understanding of the key concepts behind symmetric encryption, asymmetric encryption, and the theory of hashing.

Feedback welcomed.

Posted by Jeff Atwood View blog reactions

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Comments

hi,

for example we encrypt as hex string.

Dim encryptedData3 As Encryption.Data
Dim asym As New Encryption.Asymmetric()
Dim secret As String = "Michael Bolton"
encryptedData3 = asym.Encrypt(New Encryption.Data(secret))
sEncHexTxt = encryptedData3.Hex

There is no problem.

How can we decrypt this hex (sEncHexTxt) string...?
I can not able to convert it to encryption.data type.

Thanks...

Ozan K. on June 12, 2005 7:33 AM

Hex is a two-way property, eg:

Dim d as New Encryption.Data
d.Hex = "DEADBEEF"

p.s. Nice use of Michael Bolton, lol

Jeff Atwood on June 12, 2005 6:02 PM

Thanks...

Really it eases my pain...

Ozan K on June 15, 2005 1:45 PM

Hi,

I Save encryption(String) With Key In DataBase.
How can we decrypt this string...?

Thanks.

saeed on September 27, 2006 12:30 AM

Well i have a new theory for encryption first i thought to use my theory for compression and decompression but not worked but strangely i found it perfect for encryption like mapping file and data

Ari on September 8, 2008 9:50 AM

Thanks Jeff,

The code for the encryption class is no longer avaialble on CodeProject.

Is there somewhere else that it can be found?

Regards .... MarkJ
bms@bms.com.au

Mark J on January 28, 2009 7:32 PM

I found the code at:

http://www.dotnetmonster.com/Uwe/DirItem.aspx/Articles/NET-Framework/Security/NET-Encryption-Simplified

Thanks for sharing

Regards Mark

Mark J on January 28, 2009 7:51 PM