There are _____ modes of operation defined by NIST that are intended to cover virtually all the possible applications of encryption for which a block cipher could be used.

A(n) __________ center is where several corporations lease space and equipment to hold and protect their data.

Fill in the blank(s) with the appropriate word(s).

Which type of file does the SharedPreferences object save data to?

A. SRC B. RES C. XML D. DAT