Algorithm for encryption and decryption in c#

So in a public key cryptosystem, the sender encrypts the data using the public key of the receiver and uses an encryption algorithm that is also decided by the receiver and the receiver sends only the encryption algorithm and public key. Open Visual Studio. Now design the Windows Forms form such as follows:. To use the RSA algorithm in C , we need to add the following namespace:. Now make some variables into the class that are:. Now handle the Click Event for the Encrypt Button with the following code:.

Now handle the Click Event for the Decrypt Button with the following code:. Next Recommended Reading. Net Core 6. Create A. Understanding Thread Starvation in. NET Core Applications. Exploring Numeric Streams In Java. It is faster than it's counterpart: asymmetric encryption.

But it also has some drawbacks. For example, a single key is used for encryption and decryption, so when you encrypt the date, then you have to provide the same key for decryption. And if data is sent over the network, then at the end where decryption happened, you also need to know the same key.

It needs a high level of trust — you are sharing your key, which essentially means you're sharing your secret.

We have seen that symmetric encryption has some security and trust problems. So, asymmetric encryption helps to solve that problem. Asymmetric encryption uses two keys for encryption and decryption — one key for encryption and another key for decryption. You are able to encrypt messages with a public key and decrypt messages with a private key.

The public key is used only for encryption and cannot decrypt a message by a public key. But asymmetric encryption is slower than others; it is very slow, so it is not a good fit for large data more than 1 kilobyte. There are many algorithms for asymmetric encryption. Mainly, there are two algorithms used:. Key size in DES is very short. Here is an example of the encryption code: check comments in the code for more details.

In the 3DES, there are some enhancements that provide better encryption and also increase key size, which was very short in DES. AES supports , , and bits key sizes and bits block size. AesManaged class is a managed implementation of the AES algorithm.

This article demonstrates how to use AesManaged class to apply an AES algorithm to encrypt and decrypt data in. The following steps are required to encrypt data using AesManaged. To test the code, create a. IO; using System. WriteLine "Enter text that needs to be encrypted.. Key, aes. It should be same as raw data Console.