CHAPTER SUMMARY

This chapter discussed symmetric and asymmetric encryption algorithms and how they are used with a public key infrastructure. You read about the risks associated with maintaining key management and certificate authorities in-house and outsourcing them. You reviewed the security services that are provided through the various PKI functions and how each of them functions individually. Understanding these concepts will assist you in understanding why this technology is needed and how its use has expanded over time.

KEY CONCEPTS AND TERMS

Asymmetric cryptography

Asymmetric encryption

Authentication

Certificate authority (CA)

Certificate practice statement (CPS)

Certificate revocation list (CRL)

Cloud services

Confidentiality

Cryptosystem

Diffie-Hellman key exchange

Domain Validated (DV)

Elliptic curve cryptosystem (ECC)

Encryption

Extended Validation (EV)

Integrity

Key archival

Key distribution

Key generation

Key recovery

Keyspace

Key storage

Key termination

Key usage

Nonrepudiation

Online Certificate Status Protocol (OCSP)

Organization Validated (OV)

Public key infrastructure (PKI)

Registration authority (RA)

RSA asymmetric encryption algorithm

Self-signed certificate

Symmetric encryption

CHAPTER 11 ASSESSMENT

  1. PKI is also known as symmetric encryption.
    1. True
    2. False
  2. An encryption algorithm using 2,048-bit keys is always more secure than an algorithm using 128-bit keys.
    1. True
    2. False
  3. Which of the following are examples of symmetric algorithms? (Select two.)
    1. RSA
    2. 3DES
    3. AES
    4. Diffie-Hellman
  4. Which of the following is an example of an asymmetric algorithm?
    1. RSA
    2. 3DES
    3. AES
    4. Diffie-Hellman
  5. Asymmetric encryption is faster than symmetric encryption.
    1. True
    2. False
  6. A symmetric encryption algorithm provides which security services? (Select three.)
    1. Confidentiality
    2. Identity
    3. Authentication
    4. Authorization
    5. Nonrepudiation
  7. Certificate authorities document their business practices surrounding the issuance, revocation, and renewal of certificates in a _______________.
  8. Which of the following is the standard for certificates?
    1. X.510
    2. Certificate authority
    3. X.509
    4. Certificate validation
  9. Which of the following terms is the range of values that construct a cryptosystem key?
    1. Key length
    2. Key values
    3. Keyspace
    4. Key construction
  10. Digital signatures provide which of the following? (Select two.)
    1. Confidentiality
    2. Integrity
    3. Authentication
    4. Authorization
    5. Nonrepudiation
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