312-50V10 · Question #383
Which of the following levels of algorithms does Public Key Infrastructure (PKI) use?
The correct answer is A. RSA 1024 bit strength. PKI relies on RSA asymmetric encryption, with 1024-bit being the commonly referenced minimum key strength in foundational PKI exam contexts.
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
How the community answered
(21 responses)- A90% (19)
- B5% (1)
- C5% (1)
Why each option
PKI relies on RSA asymmetric encryption, with 1024-bit being the commonly referenced minimum key strength in foundational PKI exam contexts.
RSA (Rivest-Shamir-Adleman) is the asymmetric algorithm foundational to PKI for key pair generation, digital signatures, and certificate signing. RSA 1024-bit is the historically accepted minimum key length referenced in foundational PKI standards, providing the asymmetric encryption strength required for secure key exchange and identity verification within a PKI framework.
AES (Advanced Encryption Standard) is a symmetric cipher and does not support the asymmetric key operations that PKI requires, making it architecturally incompatible with PKI key pairs.
RSA 512-bit is considered cryptographically broken and deprecated due to feasible integer factorization attacks, making it unsuitable for any PKI deployment.
AES is a symmetric algorithm unrelated to PKI's asymmetric infrastructure, and 512 is not a valid AES key size - AES supports only 128, 192, or 256-bit keys.
Concept tested: PKI asymmetric RSA algorithm and key strength
Source: https://learn.microsoft.com/en-us/windows-server/identity/ad-cs/pki-design-guide
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