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Exam CISSP Topic 4 Question 640 Discussion

Actual exam question for ISC's CISSP exam
Question #: 640
Topic #: 4
Internet protocol security (IPSec), point-to-point tunneling protocol (PPTP), and secure sockets Layer (SSL) all use Which of the following to prevent replay attacks?

Suggested Answer: D Vote an answer

IPSec, PPTP, and SSL all use randomly generated nonces to prevent replay attacks. A nonce is a number that is used only once in a cryptographic communication. It is usually sent along with the encrypted message to ensure freshness and uniqueness. A replay attack is when an attacker intercepts and retransmits a valid message to gain unauthorized access or cause a denial of service. By using nonces, the protocols can detect and reject any repeated messages that have the same nonce value. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 6: Cryptography and Symmetric Key Algorithms, page 287. CISSP Practice Exam - FREE 20 Questions and Answers, Question 13.

by rami_mma at Aug 28, 2024, 10:33 PM

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rami_mma
2024-08-28 22:33:14
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