Starts asynchronous "prepare for encryption" operation

Declaration

Parameters

• MultiUse - specifies if the prepared key should be reused for consequent encryption operations. If MultiUse is False, the key should be prepared explicitly before each encryption operation. If MultiUse is True, the prepared key can be reused for several consequent operations.
  Note, that use of the same key for a large number of cryptooperations is not recommended due to possible security leak.

Description

    Use this method to start asynchronous pre-computation operation. This method performs time-consuming parts of encryption operation asynchronously.