An initialization vector is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining encryption, without requiring decryption of previous blocks within the stream. An aggregated data set may be used to store network component identity elements, one or more pointers to a deployed policy tree, and one or more pointers to a network configuration tree. The display unit displays a predetermined message if the writing unit finishes writing the wireless setup information to the predetermined USB memory. Here, rotating the crank extends an extension shaft away from a control shaft, whereas rotating in an opposite direction inserts the extension shaft into the control shaft.