You can position a billboard by using the ____ button. 

Answer the following statements true (T) or false (F)

1. Given the potential vulnerability of DES to a brute-force attack, an alternative has been found. 2. A number of Internet based applications have adopted two-key 3DES, including PGP and S/MIME. 3. The sender is the only one who needs to know an initialization vector. 4. A typical application of Output Feedback mode is stream oriented transmission over noisy channel, such as satellite communication. 5. Cipher Feedback (CFB) is used for the secure transmission of single values.

The _____ attribute of the output element defines the output format.

A. ?encoding B. ?version C. ?doctype-system D. ?method