If a distributed system is built as middleware on an existing network operating

Question

If a distributed system is built as middleware on an existing network operating system, then its security may depend on the security of the underlying local operating systems.
    a. true
    b. false

A security policy describes precisely which actions the entities in a system are allowed to take and which ones are prohibited.
    a. true
    b. false

A secure channel necessarily protects senders and receivers against interception, modification, fabrication, and interruption.
    a. true
    b. false

The Data Encryption Standard (DES) is used for asymmetric cryptosystems.
    a. true
    b. false

DES uses 64-bit data blocks.
    a. true
    b. false

Explanation / Answer

A security policy describes precisely which actions the entities in a system are allowed to take and which ones are prohibited
True
Reason:
Security policy is a definition of what it means to be secure for a system, organization or other entity.

A secure channel necessarily protects senders and receivers against interception, modification, fabrication, and interruption.
True
Reason:
In cryptography, a secure channel is a way of transferring data that is resistant to overhearing and tampering

The Data Encryption Standard (DES) is used for asymmetric cryptosystems.
False.

Reason:
The Data Encryption Standard (DES) is a symmetric-key block cipher

DES uses 64-bit data blocks.

True
Reason: In the case of DES, the block size is 64 bits.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.