EC-Council
312-50V9 · Question #159
312-50V9 Question #159: Real Exam Question with Answer & Explanation
The correct answer is A: RSA 1024 bit strength. PKI relies on RSA asymmetric encryption, and RSA 1024-bit was historically the standard minimum key strength used in PKI implementations.
Question
Which of the following levels of algorithms does Public Key Infrastructure (PKI) use?
Options
- ARSA 1024 bit strength
- BAES 1024 bit strength
- CRSA 512 bit strength
- DAES 512 bit strength
Explanation
PKI relies on RSA asymmetric encryption, and RSA 1024-bit was historically the standard minimum key strength used in PKI implementations.
Common mistakes.
- B. AES is a symmetric encryption algorithm, not an asymmetric algorithm, so it is not used in PKI for public/private key pair generation.
- C. RSA 512-bit is considered cryptographically weak and deprecated - it can be factored with modern computing resources and is not a valid PKI key strength.
- D. AES is a symmetric block cipher and does not support the public/private key pair model that PKI requires.
Concept tested. PKI asymmetric encryption algorithm and key strength
Reference. https://learn.microsoft.com/en-us/windows/win32/seccertenroll/about-public-key-infrastructure
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