10 Questions
What was the purpose of the Clipper chip designed by the U.S. government in 1993?
To enable the government to decrypt any encrypted traffic
In the context of smartcards, what is stored in the EEPROM?
Key material
What problem do EEPROM-based devices face when erasing information?
High voltage requirement for erasure
How did attackers manipulate early smartcards in pay-TV systems?
By tampering with the programming voltage connection on the card
Which operation does Capstone include along with public key encryption and digital signatures?
Cipher instruction search attack prevention
What key information does Clipper return along with the ciphertext when encrypting data?
User-supplied key encrypted under a known government key
What role does the Law Enforcement Access Field (LEAF) play in Clipper's encryption process?
It contains the encrypted user-supplied key
Why is it a concern if an attacker can remove the charge stored in EEPROM memory cells?
The information stored becomes vulnerable
How did attackers prevent certain channels from being deactivated in pay-TV systems?
By tampering with broadcast signals
What was a common way that subscribers manipulated their smartcards in pay-TV systems to prevent deactivation of channels they didn't pay for?
Clamping the card inside the decoder using a diode
Learn about noninvasive attacks on smartcards and microcontrollers by looking for glitches that can manipulate program behavior. Discover how finding the right glitch requires operating the card in a repeatable way with precise timing. Explore techniques to exploit single points of failure.
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