EncryptUpdate Method
Encrypts the next block of data.
Syntax
public byte[] encryptUpdate(byte[] buffer);
Remarks
Use this method to encrypt the next block of data contained in Buffer.
Call this method after calling EncryptInit for as many times as needed, until the wholevolume of data is processed. Having done that, call EncryptFinal to complete the encryptionand get the terminating encrypted trailer.