PKCS Invoked during IKE MM5 and MM6 | CCIE Security Exam 400-251
Question
Which PKCS is invoked during IKE MM5 and MM6 when digital certificates are used as the authentication method?
Answers
Explanations
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A. B. C. D. E.A.
During IKE (Internet Key Exchange) Phase 1, MM5 and MM6, digital certificates are used as the authentication method. When using digital certificates, the peers involved in the IKE exchange must validate each other's certificates to ensure they are valid and from a trusted source.
PKCS (Public Key Cryptography Standards) is a set of standards developed by RSA Security for public key cryptography. PKCS#7, PKCS#10, PKCS#11, PKCS#13, and PKCS#3 are all different standards within the PKCS suite, each with a specific purpose.
The answer to this question is A. PKCS#7. PKCS#7 is the standard used for digital signature syntax and is invoked during IKE MM5 and MM6 to verify the digital certificates. PKCS#7 is also used for signed messages and digital envelopes, and it supports multiple signers and signatures.
PKCS#10 is the standard used for certificate requests, PKCS#11 is the standard used for cryptographic tokens, PKCS#13 is the standard used for Elliptic Curve Cryptography (ECC) Cryptographic Message Syntax (CMS) and PKCS#3 is the standard used for Diffie-Hellman Key Agreement. None of these standards are directly involved in the validation of digital certificates during IKE Phase 1.
In summary, PKCS#7 is the standard used during IKE MM5 and MM6 to validate digital certificates, while PKCS#10, PKCS#11, PKCS#13, and PKCS#3 are not involved in this process.
