Encryption and decryption the Data with Secret key

Question

We use AES 256 algo rhythm for encryption.

1. Mode : ECB

2. Key Size : 256 bits

3. Secrete key : own key.

4. Output Text format : Base 64 in c#

i am apply multiple C# sharp code but my encrption data is different checking with website(AES Encryption and Decryption Online (devglan.com))

please help any one on urgent basis.....

Mayooran Navamany · Answer

Here is a simple implementation in C#: Add the necessary imports: using System; using System.Security.Cryptography; using System.Text; public class AesEncryption { public static string Encrypt(string plainText string key) { byte[] keyBytes = Encoding.UTF8.GetBytes(key); byte[] inputBytes = Encoding.UTF8.GetBytes(plainText); using (Aes aesAlg = Aes.Create()) { aesAlg.Key = keyBytes; aesAlg.Mode = CipherMode.ECB; aesAlg.Padding = PaddingMode.PKCS7; ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key aesAlg.IV); byte[] encryptedBytes = encryptor.TransformFinalBlock(inputBytes 0 inputBytes.Length); return Convert.ToBase64String(encryptedBytes); } } public static string Decrypt(string encryptedText string key) { byte[] keyBytes = Encoding.UTF8.GetBytes(key); byte[] encryptedBytes = Convert.FromBase64String(encryptedText); using (Aes aesAlg = Aes.Create()) { aesAlg.Key = keyBytes; aesAlg.Mode = CipherMode.ECB; aesAlg.Padding = PaddingMode.PKCS7; ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key aesAlg.IV); byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes 0 encryptedBytes.Length); return Encoding.UTF8.GetString(decryptedBytes); } } public static void Main(string[] args) { string key = your_32_byte_long_secret_key_here; // Must be 32 bytes for AES-256 string original = Hello World!; // Encrypt the string string encrypted = Encrypt(original key); Console.WriteLine($Encrypted: {encrypted}); // Decrypt the string string decrypted = Decrypt(encrypted key); Console.WriteLine($Decrypted: {decrypted}); } } Notes: Key Size : Ensure that your secret key ( key ) is exactly 32 bytes long. Mode : This example uses ECB mode as requested. Padding : The padding mode used here is PKCS7 which is common and should match most tools. Base64 : The output is encoded in Base64 format. How to Test: Copy the code into a C# console application. Replace your_32_byte_long_secret_key_here with your actual 32-byte key. Replace Hello World! with your actual plaintext data. Run the program and compare the output with the results from the online tool.

Sanjeev Kumar · Answer

Hi Sir a am apply this code but encryption value is different this code is apply encryption value: DaFIzm+1j3DLhZ4J9pFUzQ==