What is the best attack to break a scheme with n-bits of security? A) n steps B) 2n + 1 steps C) 2n steps D) 1n steps
Understand the Problem
The question is asking which option describes the best attack strategy to compromise a cryptographic scheme that is secure with n-bits of security, suggesting a focus on understanding security levels in cryptography.
Answer
2^n steps
The best attack to break a cryptographic scheme with n-bits of security is typically in 2^n steps.
Answer for screen readers
The best attack to break a cryptographic scheme with n-bits of security is typically in 2^n steps.
More Information
In cryptographic terms, an n-bit security level means that an adversary is expected to need approximately 2^n operations to successfully break the scheme by brute force.
Tips
A common mistake is to confuse the amount of effort needed (2^n) with the size of the security (n). Always remember that the effort is exponential due to the design of cryptographic schemes.
Sources
- SHA-1 gets SHAttered — Blog - Evervault - evervault.com
- Collision attack - Wikipedia - en.wikipedia.org
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