18 Questions
What is a key benefit of using tunnel mode over transport mode?
Tunnel mode hides information about communicating parties
What type of protection does AH provide on the header?
Integrity protection only
What is a key difference between ESP and AH?
AH protects the IP header, ESP does not
Why is AH still useful despite ESP providing encryption and authentication?
AH protects the IP header, which ESP does not
What is the purpose of an Intrusion Detection System (IDS)?
To detect intrusion
What is the concept of using both firewalls and IDS?
Defense in depth
What is the primary function of IKE in IPsec?
To provide mutual authentication and establish a shared key
What information does an IPsec header contain?
The security association to use
What is the purpose of a security association (SA) in IPsec?
To define a network-layer unidirectional logical connection
What are the two phases of IKE in IPsec?
Session key derivation and SA creation
What is contained in a security association (SA) in IPsec?
The cryptographic keys and algorithms used
Why is it not recommended to use the same key for each flow in IPsec?
Because it increases the risk of key compromise
What is the main purpose of the initiator's message in the aggressive mode of IKE phase 1?
To negotiate the cryptographic algorithms
What is the outcome of the main mode of IKE phase 1?
Establishment of a security association
What is the primary function of the authentication method in IPsec?
To authenticate the sender's identity
What is the benefit of allowing parties to negotiate cryptographic algorithms and parameters in IPsec?
It allows users to migrate to stronger crypto
What is the primary difference between the aggressive mode and the main mode of IKE phase 1?
The number of messages exchanged between the parties
What is the purpose of the 'proofs of identity' in IKE phase 1?
To authenticate the responder's identity
Understand the step-by-step process of the SSL/TLS handshake protocol, including the roles of Alice and Bob in establishing a secure connection. Learn about the exchange of cryptographic algorithms and proofs of identity.
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