Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Intro To Cybersecurity > Module 7 > Flashcards

Module 7 Flashcards

1
Q

What are the two keys used with asymmetric cryptography? What are the uses of assymetric cryptography?

A
  • 2 keys: Public key (can be distributed and shared), private key (must be kept confidential)
  • 2 uses:
    1. Encrypts or decrypts a set of data
    2. used as proof to verify a “signature” of the sender
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a digital signature? What is it’s weakness?

A
  • Electronic verification of the sender
  • Weakness: Only proves the owner of the private and key and does not confirm the true identity of the sender
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a digital certificate?

A

A technology used to associate a user’s identity to a public key and that has been “digitally signed” by a trusted third party”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a certification authority (CA)?

A

Entity that is responsible for digital certificates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are some of the ways a digital certificate may be authenticated?

A
  • Email
  • Documents
  • In person
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a certificate repository (CR)?

A
  • A certificate repository (CR) is a publicly accessible centralized directory of digital certificates that can be used to view the status of a digital certificate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is certificate revocation? What are two ways you check if a certificate is revoked?

A

Expiration of a digital certificate to ensure security is not compromised

Methods to see if a certificate is revoked:

  1. certificate revocation list (CRL) is a list of certificate serial numbers that have been revoked
  2. Online Certificate Status Protocol (OCSP)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a root digital certificate?

A
  • A certificate that is created and verified by a CA.
  • Root certificate trusts the intermediate certificates which is the next level down
  • Self signed and does not depend on higher authority for authentication
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a domain digital certificate?

A
  • Certificates that ensure the authenticity of the web server to the client and the authenticity of the cryptographic connection to the web server
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the different types of domain validation digital certificates? (hint 4)

A
  1. Domain Validation: Certification that verifies the identity of the entity that has control over the domain name
  2. Extended Validation (EV): Certificate that requires more extensive verification of the legitimacy of the business than does a domain validation digital certificate.
  3. Wildcard: Certificate used to validate a main domain along with all subdomains.
  4. Also known as a Unified Communications Certificate (UCC), certificate primarily used for Microsoft Exchange servers or unified communications.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name 3 Hardware and Software Digital Certificates:

A
  1. Machine/Computer digital Certificate: Certificate used to verify the identity of a device in a network transaction.
  2. Code signing digital certificate: Used by software developers to digitally sign a program to prove that the software comes from the entity that signed it
  3. Email Digital certificate: certificate that allows a user to digitally sign and encrypt mail messages.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the standard format for digital certificates? What certificate attributes make up this format?

A
  • X.509
  • Attributes that must be included are the certificate validity period, end-host identity information, encryption keys that will be used for secure communications, the signature of the issuing CA, and the common name (CN).
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is public key infrastructure? (PKI)

A

underlying infrastructure for the management of public keys used in digital certificates.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a trust model?

A

The type of trust relationship that can exist between individuals or entities.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the Hierarchical trust model?

A
  • Public Key infrstructure (PKI) trust model
  • assigns a single hierarchy with one master CA called the root. The root signs all digital certificate authorities with a single key
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a Distributed trust model?

A
  • Public Key infrstructure (PKI) trust model
  • has multiple CAs that sign digital certificates.
17
Q

What is a Bridge trust model?

A
  • Public Key infrstructure (PKI) trust model
  • one CA acts as a facilitator to interconnect all other CAs. The facilitator CA does not issue digital certificates; instead, it acts as the hub between hierarchical trust models and distributed trust models, linking the models together
18
Q

What is a certificate policy?

A
  • published set of rules that govern the operation of a PKI. The CP provides recommended baseline security requirements for the use and operation of CA, intermediate CA, and other PKI components.
19
Q

What is a certificate practice statement (CPS)?

A

describes in detail how the CA uses and manages certificates.

20
Q

What are the 4 parts of a certificate life cycle?

A
  1. Creation
  2. Suspension
  3. Revocation
  4. Expiration
21
Q

Proper key management includes ______________, _____________, and _________________ procedures.

A
  1. Key storage
  2. Key usage
  3. Key handling
22
Q

Name 7 of the key handling procedures:

A
  1. Escrow: A process in which keys are managed by a third party, such as a trusted CA.
  2. Expiration: Date at which keys no longer function
  3. Renewal: renewing a key
  4. Revocation: getting rid of key before its expiration permanently
  5. Recovery: Key recovery agent recovers lost or damaged digital certificates
  6. Suspension: Temporarily getting rid of a key
  7. Destruction: Removes all private and public keys along with the user’s identification information in the CA
23
Q

What is Secure sockets layer (SSL)?

A
  • An early and widespread cryptographic transport algorithm that is now considered obsolete.
24
Q

What is SSL stripping?

A

An attack that manipulates SSL functions by intercepting an HTTP connection.

25
Q

What is Transport layer security (TLS)?

A
  • A widespread cryptographic transport algorithm that replaces SSL.
    • More secure and fixes vulnerabilities
26
Q

What is a cipher suite?

A

A named combination of the encryption, authentication, and message authentication code (MAC) algorithms that are used with TLS and SSL.

27
Q

What is Secure shell (SSH)?

A
  • An encrypted alternative to the Telnet protocol that is used to access remote computers.
28
Q

What is Hypertext Transport Protocol Secure (HTTPS)?

A
  • HTTP sent over TLS (Transport Layer Security) or SSL (Secure Sockets Layer).
29
Q

What is Secure/Multipurpose Internet Mail Extensions (S/MIME)?

A

A protocol for securing email messages.

30
Q

What is Secure Real-time Transport Protocol (SRTP)?

A
  • A protocol for providing protection for Voice over IP (VoIP) communications.
31
Q

What is Internet Protocol Security (IPsec)?

A
  • A protocol suite for securing Internet Protocol (IP) communications.
    • authenticates each IP packet of a session between hosts or networks.
  • Provides authentication, confidentiality, and key management
  • Two encryption modes:
    1. Transport Mode: An IPsec mode that encrypts only the data portion (payload) of each packet yet leaves the header unencrypted.
    2. Tunnel Mode: An IPsec mode that encrypts both the header and the data portion.
32
Q

What is a cryptographic key?

A
  • a value that serves as input to an algorithm, which then transforms plaintext into ciphertext (and vice versa for decryption).
  • A key, which is essentially a random string of bits, serves as an input parameter for hash, symmetric encryption, and asymmetric cryptographic algorithms.
33
Q

What characteristics determine key strength?

A
  • Randomness (no predictable pattern)
  • cryptoperiod, or the length of time for which a key is authorized for use.
  • Length of the key (key space)
34
Q

What is a block cipher mode of operation?

A
  • How block ciphers handle blocks of ciphertext by using a symmetric key block cipher algorithm to provide an information service.
  • Could either be an:
    • authentication mode of operation** **(credentialing service)
    • Unathentification** **mode of operation** **(confidentiality service)
35
Q

Provide 4 examples of block cipher mode of operation:

A
  1. Electronic Code Book (ECB).
  2. Cipher Block Chaining (CBC)
  3. Counter (CTR)
  4. Galois/Counter (GCM)
36
Q

What does a crypto service provider do?

A
  • allows an application to implement an encryption algorithm for execution.
  • providers implement cryptographic algorithms, generate keys, provide key storage, and authenticate users by calling various crypto modules to perform the specific tasks.

Intro To Cybersecurity (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions