An iterated block cipher encrypts by breaking the plaintext block into
two halves and, with a subkey, applying a round transformation to
one of the halves. Then, the output of this transformation is XORed with
the remaining half. The round is completed by swapping the two
halves. This type of cipher is known as:

Which one of the following statements BEST describes the operation of
the Digital Signature Algorithm (DSA) (National Institute of Standards
and Technology, NIST FIPS PUB 186, Digital Signature Standard,

The Wireless Transport Layer Security Protocol (WTLS) in the Wireless
Application Protocol (WAP) stack provides for security:

The NIST Advanced Encryption Standard uses the:

DESX is a variant of DES in which:

The Take-Grant model:

The system component that enforces access controls on an object is the:

In order to recognize the practical aspects of multilevel security in
which, for example, an unclassified paragraph in a Secret document has
to be moved to an Unclassified document, the Bell-LaPadula model
introduces the concept of a:

What are the hardware, firmware, and software elements of a Trusted
Computing Base (TCB) that implement the reference monitor concept
called?

Which of the following would be the BEST description of clipping levels?