What Is AES? AES stands for Advanced Encryption Standard. It is a symmetric block cipher that is used by the U.S. government to protect classified information. AES is used worldwide to protect classified data around the world. AES is essential in cybersecurity, electronic data protection, and computer security. Variations of AES AES is used in three block cipher versions namely AES 128, AES 192, AES 256. AES 128 uses 128-bit key length to encrypt and decrypt block messages. This is a symmetric secret key which means it uses same secret key for encrypting and decrypting message blocks. AES Encryption of Excel File Today we will AES 128 to encrypt an Excel File. The excel file looks like the following image. To encrypt this excel file, we will use C#. First, we need to create a console project. Let's name the project ExcelEncryption. First, we try to understand what we need to achieve. We need a KEY and Initialization Vector (IV) pair for AES 128 encryption. Let’s say, th...
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