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Security+ Guide to Network Security Fundamentals

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Discuss the two encryption modes supported by IPsec: transport mode and tunnel mode. Quick Quiz 2 1. ____ is a framework for all of the entities involved in digital certificates—including hardware, software, people, policies and procedures—to create, store, distribute, and revoke digital certificates. Answer: Public key infrastructure (PKI) Public key infrastructure PKI 2. ____ is a numbered set of PKI standards that have been defined by the RSA Corporation. Answer: Public-key cryptography standards (PKCS) Public-key cryptography standards PKCS 3. A(n) ____ refers to the type of trusting relationship that can exist between individuals or entities. Answer: trust model 4. A(n) ____ is a published set of rules that govern the operation of a PKI.
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Security+ Guide to Network Security Fundamentals, Fourth Edition 12-9 Answer: certificate policy (CP) certificate policy CP Class Discussion Topics 1. What kind of trust model does PGP use? 2. When is a PKI required? Additional Projects 1. Ask your students to read the following article about the risks of key recovery, key escrow, and trusted third party encryption at and write a report summarizing its most important points. 2. Ask your students to read more about SSL and TLS and write a report explaining how they work. Use the following link as a starting point: . Additional Resources 1. S/MIME 2. Public-Key Cryptography Standards (PKCS) 3. RFC2516 - A Method for Transmitting PPP Over Ethernet (PPPoE) 4. Public key certificate 5. IP Encapsulating Security Payload (ESP) Key Terms bridge trust model A trust model with one CA that acts as a facilitator to interconnect all other CAs. Certificate Authority (CA) A trusted third-party agency that is responsible for issuing the digital certificates.
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Security+ Guide to Network Security Fundamentals, Fourth Edition 12-10 Certificate Repository (CR) A publicly accessible centralized directory that contains digital certificates that can be used to view the status of a digital certificate. Certificate Revocation List (CRL) A repository that lists revoked digital certificates. digital certificate A technology used to associate a user’s identity to a public key, in which the user’s public key is “digitally signed” by a trusted third party. direct trust A type of trust model in which a relationship exists between two individuals because one person knows the other person. distributed trust model A trust model that has multiple CAs that sign digital certificates. hierarchical trust model A trust model that has a single hierarchy with one master CA.
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  • Cryptography, Public key infrastructure, Public-key cryptography, Certificate authority, digital certificates, Network Security Fundamentals

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