By Pete Stromquist, Tom Fischer, Nathan Smith, Jason Bock
When you utilize .NET to create client-and server-side functions, you need to tackle a brand new and big set of protection concerns. .NET Security indicates you what you want to understand through overlaying various points of the .NET safety version via distinct discussions in regards to the key namespaces. The authors exhibit tips to write .NET code to create safe platforms in the .NET Framework. in addition they talk about attainable break-ins to the protection version in .NETand how .NET prevents such intrusions.
This educational explains tips to use the .NET safeguard and cryptographic sessions, and features as a reference handbook for builders trying to comprehend safety implementation within the .NET Framework. also, the .NET Framework calls for realizing in lots of new parts like controlled code, permissions, and evidenceall of which this dynamic e-book covers.
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Asymmetric Keys Similar to what you saw in the previous sections, all asymmetric algorithms derive their implementations from the abstract class AsymmetricAlgorithm. NET defines two abstract implementations of AsymmetricAlgorithm: Rivest, Shamir, and Adleman (RSA) and Digital Signature Algorithm (DSA) . The RSA algorithm is able to both perform encryption and create digital signaturesj DSA can only be used for signatures. However, signing with DSA is faster than in RSA. Each abstract class has a CryptoServiceProvider implementation.
Keyj You'll see in the next section, "Encrypting and Decrypting Data," how you can use these properties to perform encryption and decryption. For now, just note that you can use these properties to set up the key information before you start encrypting data. However, as you know, only certain key lengths are allowed. Also, different algorithms support different kinds of padding and modes during the encryption process. That's where the next set of properties come into play. You can use LegalKeySizes as shown in Listing 2-3 to find out if a desired key size will work or not.
This complicates matters a little, especially if you're trying to hash an array of longs or a String variable. In both cases, the conversions aren't always obvious. GetBytes(originalPrelmage); My original hope was that the String class would have a method to get its representation in a byte array. Unfortunately, the closest I could get was ToCharArrayO, but HashAlgorithm won't take that. Therefore, I used the Encoding class (which is in the System. Text namespace) to get a byte array for a String.