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Exam SSCP topic 5 question 76 discussion

Actual exam question from ISC's SSCP
Question #: 76
Topic #: 5
[All SSCP Questions]

Which of the following protects Kerberos against replay attacks?

  • A. Tokens
  • B. Passwords
  • C. Cryptography
  • D. Time stamps D
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Suggested Answer: Explanation 🗳️
A replay attack refers to the recording and retransmission of packets on the network. Kerberos uses time stamps, which protect against this type of attack.
Source: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002, chapter 8: Cryptography (page 581).

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Stevovo123
6 months ago
Selected Answer: D
D. Time stamps Time stamps are used to protect Kerberos against replay attacks. In the Kerberos authentication protocol, time stamps are included in the tickets to ensure that a ticket is only valid for a specific period of time. This prevents an attacker from intercepting a Kerberos ticket and replaying it at a later time because the time stamp will have expired, rendering the ticket invalid. Time-based validity checks are a crucial part of the security mechanisms in Kerberos authentication.
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