Question

What would make cracking Defender more difficult?

a.

Using longer keys

b.

Using shorter keys

c.

Using a secret algorithm for computing the key

d.

Using user input for computing the key

Posted under Reverse Engineering

Answer: (a).Using longer keys Explanation:If longer 64-bit or 128-bit keys were used, cracking Defender wouldn't have been possible without a valid serial number.

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. What would make cracking Defender more difficult?

Add Comment

Similar Questions

Discover Related MCQs

Q. Why was the Chained Block Cipher in Defender crackable?

View solution

Q. What is the purpose of dongle protection?

View solution

Q. How does Defender generate decryption keys?

View solution

Q. What is a cryptographic hash algorithm?

View solution

Q. How does Defender use interdependent keys?

View solution

Q. What are interdependent keys?

View solution

Q. What is the advantage of generating decryption keys in runtime?

View solution

Q. What should be done with the verification thread in a commercial product environment?

View solution

Q. Why should the actual checksum verifications be inlined?

View solution

Q. What is the purpose of adding periodical checksum calculations from the main thread?

View solution

Q. What priority should the verification thread be set to in a commercial product environment?

View solution

Q. What changes should be made to the counter constant in a commercial product environment?

View solution

Q. Is the current implementation of the verification thread safe for commercial use?

View solution

Q. What modifications can be made to a time-stamp verification thread to make it more difficult to remove?

View solution

Q. What would happen if the encryption on each key function was not implemented in the Processor Time-Stamp Verification Thread?

View solution

Q. Why is it important to directly access the hardware time-stamp counter using a low-level instruction in the Processor Time-Stamp Verification Thread?

View solution

Q. What is the purpose of the Processor Time-Stamp Verification Thread in Defender?

View solution

Q. What is the impact of obfuscating the interface with the operating system?

View solution

Q. What was the purpose of adding the call to IsDebuggerPresent API in Defender?

View solution

Q. What is the weakness in Defender's technique of obfuscating API calls?

View solution

View All MCQs on Reverse Engineering

Suggested Topics

Are you eager to expand your knowledge beyond Reverse Engineering? We've curated a selection of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!

Object Oriented Programming

Enhance your coding skills with our Object Oriented Programming MCQs. Understand...

Reverse Engineering

Strengthen your understanding of Reverse Engineering with our curated set of MCQs....

IT Fundamentals

Navigate the basics of information technology with our IT Fundamentals MCQs. Get a...

Internet of Things (IoT)

Discover how devices communicate with each other in the smart world with our IoT...

Data Warehousing and OLAP

Strengthen your knowledge of Data Warehousing and OLAP with our specialized MCQs....

Hadoop

Dive into the world of big data with our Hadoop MCQs. Cover key concepts including...

Software Architecture and Design

Get a strong hold on the blueprint of software systems with our Software Architecture...

C# programming

Hone your skills in the C# language with our MCQs. Understand data types, operators,...

SQL Server

Master Microsoft's database server with our SQL Server MCQs. Topics cover database...