Hardware Security - Intellectual Property (IP) Protection

1. The goals of IP protection:

• Protect testing data associated with the IP
• Protect IP against unauthorized use
• Trace IPs

2. You want to minimize a 4-variable function F(a,b,c,d) with two don't care conditions, {a=b=c=d=1} and {a=d=1, b=c=0} (or abcd and ab'c'd). To embed your signature with the watermarking approach described on slide "Watermarking a Boolean Formula" (page 1 in "Watermarking Examples"), you decide to minimize F(a,b,c,d)+abcd instead, what is your signature?
Ans: 10

3. A good watermark will be difficult or impossible to be removed by any adversary without detailed knowledge about the watermark, this property is known as

• Resilience

4. A good watermark should not require major modification to the industrial design tools and design software, this property is known as

• Transperancey

5. In the slide of "Public Watermarking GP Problem" (page 6 in "Good Watermarks"), which of the followings should be made to the public?

• The public watermark you want to embed in the solution
• The scheme that public watermark head and body will be constructed
• The pairs of nodes selected to embed the public watermark bits
• The rules on how each public watermarking bit will be embedded

6. Bob decides to use the clique manipulation method to generate fingerprinting solutions to the graph coloring problem. He finds a clique of 4 nodes and apply the method. How many distinct solutions can Bob generate?

• 4!

7. In the slide "Fingerprinting: Don’t Cares (I)" (page 6 in "Fingerprinting"), Alice decides to create fingerprinting copies of the original circuit by adding a new connection to the OR gate, which of the followings are correct?

• connect signal X' to the OR gate

8. When we use serial number as the tag for a device, which property does this tag have?

• Reproducable
• Passive

9. IC metering methods that can also be used to lock, unlock, enable, disable, or controll the IC are known as ________ metering method.

• Active

10. IC tags that are based on fabrication variations have the property of ____________ and therefore will be a good candidate to countermeasure foundry overbuilding.

• Unclonable