Two Approaches That Use a Block Cipher to Build a PNRG

question 28

Multiple Choice

two approaches that use a block cipher to build a PNRG and have gained widespread acceptance are:

• A)CtR mode and CFB mode
• B)CtR mode and OFB mode
• C)CBC mode and CFB mode
• D)OFB mode and ECB mode

---

Definitions:

World Trade Organization

An intergovernmental organization that regulates international trade with the aim of ensuring that trade flows as smoothly, predictably, and freely as possible.

Trade Barriers

Measures such as tariffs, quotas, and regulations that governments use to control the amount and type of goods and services imported or exported.

Comparative Advantage

The ability of an individual, firm, or country to produce a good or service at a lower opportunity cost than competitors, underpinning international trade theories.

Absolute Advantage

The ability of an entity to produce a good or service at a lower cost per unit than other competitors using the same amount of resources.