// Search a DES3 secret key CryptokiCollection template = new CryptokiCollection(); template.Add(new ObjectAttribute(ObjectAttribute.CKA_CLASS, CryptokiObject.CKO_SECRET_KEY)); template.Add(new ObjectAttribute(ObjectAttribute.CKA_KEY_TYPE, Key.CKK_DES3)); // Launchs the search specifying the template just created CryptokiCollection objects = session.Objects.Find(template, 1); SecretKey secretKey = (SecretKey)objects[0]; // encrypt session. EncryptInit(Mechanism.DES3_ECB, secretKey); byte[] ciphertext = session.Encrypt(plaintext); // decrypt session.DecryptInit(Mechanism.DES3_ECB, secretKey); byte[] plaintext1 = session.Decrypt(ciphertext);