There are several free macOS tools you can use for file encryption on a Mac: To protect your Mac and ensure the safety of your files we recommend to use data encryption. Therefore, the risk of your computer being hacked may cause you a lot of anxiety. Nowadays, a laptop is one’s private world and a place to store personal information. Create a new instance of the default Aes implementation class.ĮncryptedSymmetricKey = rsa.Encrypt(aes.Key, RSAEncryptionPadding.Pkcs1) ĮncryptedSymmetricIV = rsa.Encrypt(aes.IV, RSAEncryptionPadding.Long gone are the days when a computer was thought of as a device solely for work. Set rsaKeyInfo to the public key values. RSAParameters rsaKeyInfo = new RSAParameters() Create a new instance of the RSAParameters structure. Create a new instance of the RSA class. Create values to store encrypted symmetric keys. 'Create a new instance of the default Aes implementation class.ĮncryptedSymmetricKey = rsa.Encrypt(aes.Key, RSAEncryptionPadding.Pkcs1)ĮncryptedSymmetricIV = rsa.Encrypt(aes.IV, RSAEncryptionPadding.Pkcs1) 'Set rsaKeyInfo to the public key values. 'Create a new instance of the RSAParameters structure. 'Create a new instance of the default RSA implementation class. 'Create values to store encrypted symmetric keys. Using (StreamWriter encryptWriter = new(cryptoStream))Ĭonsole.WriteLine("The file was encrypted.") Ĭonsole.WriteLine($"The encryption failed. For example, new StreamWriter(cryptoStream, Encoding.Unicode). To change the text encoding, pass the desired encoding as the second parameter. By default, the StreamWriter uses UTF-8 encoding. This way the encrypted data is always different, even when plain text is the same. While the same key can be used multiple times to encrypt and decrypt data, it is recommended to generate a new random IV each time. Then a message is written to the encrypted stream with the StreamWriter class. Generated IV is written to the beginning of FileStream, so it can be read and used for decryption. This example creates a file stream that is encrypted using the CryptoStream class and the Aes class. The following example shows the entire process of creating a stream, encrypting the stream, writing to the stream, and closing the stream. Dim aes As Aes = Aes.Create()įileStream, aes.CreateEncryptor(key, iv), CryptoStreamMode.Write)ĬryptoStream cryptStream = new CryptoStream(įileStream, aes.CreateEncryptor(key, iv), CryptoStreamMode.Write) Īfter this code is executed, any data written to the CryptoStream object is encrypted using the AES algorithm. In this case, the default key and IV generated from aes are used. The CreateEncryptor method from the Aes class is passed the key and IV that are used for encryption. In this example, the CryptoStream is initialized with a stream object called fileStream that can be any type of managed stream. The instance is used to perform encryption on a CryptoStream class. The following example illustrates how to create a new instance of the default implementation class for the Aes algorithm. Using these classes, you can perform symmetric encryption on a variety of stream objects. The CryptoStream class can be initialized using any class that derives from the Stream class, including FileStream, MemoryStream, and NetworkStream. The CryptoStream class is initialized with a managed stream class, a class that implements the ICryptoTransform interface (created from a class that implements a cryptographic algorithm), and a CryptoStreamMode enumeration that describes the type of access permitted to the CryptoStream. The managed symmetric cryptography classes are used with a special stream class called a CryptoStream that encrypts data read into the stream. Asymmetric encryption is performed on a small number of bytes and is therefore useful only for small amounts of data. Symmetric encryption is performed on streams and is therefore useful to encrypt large amounts of data. Symmetric encryption and asymmetric encryption are performed using different processes.
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