To ensure that a Word 2013 document can be opened in an earlier version of Word, you would click ________

A __________ cipher is one in which a block of plaintext is treated as a whole and used to produce a ciphertext block of equal length.

A) ?bit ? B) ?product ? C) ?stream D) ?block

A __________ cipher is one that encrypts a digital data stream one bit or one byte at a time.

A) ?product ? B) ?block ? C) ?key ? D) ?stream