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Test your basic knowledge |
CISSP Crypto Domain
Start Test
Study First
Subjects
:
certifications
,
it-skills
,
cissp
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 32 to 448 bit key - Schneier
Blowfish
algorithm
running key
asymmetric key encryption
2. Integrity Check Value-makes the hash with the hash algorithm
transposition cipher
PKI
Hybrid Encryption
ICV
3. Single authority trust; heirarchal trust; web of trust; hybrid cross certificationusesd in businesses to trust each others CA's; and DISA Model Root; intermediate; leaf at the local levels
Rivest Cipher
trust model types
digital signatures
initialization vector/salt
4. Public Key Infrastructure- Developed to provide standards for key generation; authentication; x.509 non used with Pretty Good Privacy; good private good "web of trust"
substitution cipher
PKI
vernam cipher
OCSP
5. Operates on bits - higher speed - usually implemented in hardware.
symmetric algorithms types
DES CTR
cryptography
Stream Cipher
6. Credentials that allow verification; contains serial no; ident info; dig signature;lifetime dates;public key of the cert holder
cryptography
blowfish
cert contents
symmetric Crypto
7. Message hidden within larger context.
4 O's
digital signatures
concealment cipher
key clustering
8. Authentication and integrity - needed when... At rest and in transit.
digital signatures
signature
Asymmetric uses
Digital Signature Standard
9. RSA
prime factorization
key escrow
one time pad
running key
10. Asymmetric enc + Hash - validity of message - non repudiation
Digital Signature Standard
DES CBC
Signature
MD5
11. Certificate Authority; registration authority offloads work; validates identity; distributes key; certificate server maintains repository that stores certificates
kerckhoffs principle
algorithm
CA
symetric
12. Online Certificate Status Protocol- used to query the CA; useful in large; complex environments; responds to a query with status of valid; suspended; or revoked
cryptanalysis
Digital Signature Standard
OCSP
symmetric algorithms types
13. Hash Mess Auth Code (512bit MD5; SHA-1); calculated using a hash function with secret key- shared key appended to data shared faster than DES CBC- used in IPSEC SSL/TLS and SSH
OCSP
collision
HMAC
steganography
14. Polyalphabetic - substitution - 2d grid of alphabet
prime factorization
vigenere cipher
blowfish
key mgmgt defined
15. Advanced Encryption Standard - replaced DES - Rijndael based - 128 - 192 - and 256 bit keys/blocks with 10 - 12 - 14 rounds resp.
work factor
DES CFB
one time pad
AES
16. Numeric seeding value used to with a symmetric key to provide randomness
initialization vector/salt
Lucifer
end to end enccryption
Diffie-Hellman Algorithm
17. Rivest-Shamir-Adleman - factorization - used for encryption - key exchange and digital signature.
Block Cipher
collision
ECC
RSA
18. Secret sequence of bits and instructions used to encrypt/decrypt
AES
cryptovariable
running key
Digital Signature Standard Algorithms
19. Cipher Block Chaining- most common mode of DES loaded sequenctially- XORed using 64 bit initialization vector- first ciphertext XORed with next text block- since IV different;ciphertext different
Blowfish
rounds
DES CBC
Output Feedback Mode
20. 64 bit blocks of data; variable key lengths
blowfish
scytale
CA
link encryption
21. Estimated time resources to break a cryptosystem
work factor
symmetric Crypto
brute force attack on hashing
frequency analysis
22. Centralized key mgt key issuer; keeps copy of keys or decentralized key mgt; end user generates keys and submits to CA;does not provide for key escrow; no recovery possible
key mgmt mechanisms
Public Key Infrastructure
kerckhoffs principle
Lucifer
23. Replaces bits characters and block s with differecnt values
ECC
DES CBC
work factor
substitution cipher
24. Scrambled version of the alphabet
polyalphabetic
DES OFB
crypto services
vernam cipher
25. Different keys for encryption and decryption; two keys private and public Encrypt with private- unencrypt with privateor encrypt with public- decrypt with private. Use of private ensures non repudiation; without confidentiality-becomes the digital si
asymmetric algorithms
Rivest Cipher
ciphertext
steganography
26. Set symbol size usually 64 bits
diffusion
asymmetric algorithms
Block Cipher
DES CBC
27. Setting policies; protecting keys; key recovery; responding to key compromise; keys long enough to prevent attack; cryptoperiod: key lifetimes
key mgmgt defined
Block Cipher
cryptology
work factor
28. 128 bit encryption; on 16 rounds of encryption; key size of 64 bits 8 parity; 56 bits long
blowfish
confusion
Lucifer
Digital Signature Standard
29. Large set of possible values used to construct keys
Rivest Cipher
Diffe Helman
blowfish
key space
30. 48 rounds - 2 or 3 keys - enc enc enc (EEE) - or enc dec enc (EDE)
Block Cipher
symetric synonyms
Signature
3DES
31. SHA - RSA - Eliptical Curve (ECDSA)
hashing algorithm strengths
Digital Signature Standard Algorithms
HMAC
Hybrid Encryption
32. Block based - adds padding - same key - same clear = same ciphertext
Rivest Cipher
key clustering
ONE time pad problems
Electronic Code Book
33. Similar to RSA - very efficient for low end hardware/limited processing power.
symmetric algorithms types
ECC
Elliptical Curve Cryptosystem
symmetric algorithms types
34. OCSP; OSPF- routing protocol; Online Vulnerability Assessment Language; Orthogonal Frequency Division Multiplexing
35. key storage;escrow;archival;recovery agend;multiple key pairs
digital signatures
Electronic Code Book
key mgmt tasks
message hashing
36. Based on probability with 23 people 50% chance 2 will have same birthday
CRL
crypto services
birthday paradox
Exclusive Or(XOR)
37. MD5 - SHA1
REED D asym algorithms
Common Hash Algorithms
substitution cipher
Symmetric Algorithms
38. Keys needed to decrypt cyphertext so an authorized third party can gain access
ECC
ICV
digital signatures
key escrow
39. Mipher added to plaintext to encrypt
cert contents
key mgmgt defined
running key
Symmetric Algorithms
40. No plaintext exposure; encrypted at source; VPN; SSL ;SSH
scytale
HAVAL
end to end enccryption
DES ECB
41. Eliptical Curve Cryptography; encryption; dig signatures and key exchange;highest strength per bit of key length; most efficient;160 bit el gamal= 1024 RSA-used in wireless devices use
initialization vector/salt
CRL
ECC
key storage
42. Prove knowledge of a fact to a third party without revealing the fact itself
Lucifer
El Gamal
zero knowledge proof
RiJndael(AES)
43. Malled online encryption or traffic flow security- implemented in hardware' encrypts all traffic in a single path
algorithm
collision
link encryption
LUC
44. 1996 - crypto is protected in agreement.
Cipher Feedback Mode
SHA2
wassenaar arrangement
HMAC
45. Caesar cipher - scytale - Blaise de vigenere - vernam cipher
CRL
diffusion
historical highlights
running key
46. Relies on finding weaknesses in the hashing algorithm
blowfish
DES CBC
Public Key Infrastructure
brute force attack on hashing
47. Block based - Previous block seeds next blocks key
initialization vector/salt
RSA
ECC
Cipher Block Chaining
48. Published document describing: howa CA is structured;which standards are used and how certs are managed
certificate practice statement
FIPS 186
ONE time pad problems
historical highlights
49. Pro's: key management cons: speed/file size
asymmetric key encryption
cryptovariable
Elliptical Curve Cryptosystem
scytale
50. DES - 3des - aes - idea - two fish - rc4 - blow fish
Symmetric Algorithms
ECC
AES
SHA2