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

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

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

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

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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?

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

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

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

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

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

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

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Q. Why should the actual checksum verifications be inlined?

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

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

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Q. What are interdependent keys?

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Q. How does Defender use interdependent keys?

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Q. What is a cryptographic hash algorithm?

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Q. How does Defender generate decryption keys?

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Q. What is the purpose of dongle protection?

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

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