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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. Integrity Check Value-makes the hash with the hash algorithm
collision
Symmetric Algorithms
ICV
RSA
2. Scrambled version of the alphabet
3DES
running key
Key zeroization
polyalphabetic
3. Placementof a secret copy in a secure location
key mgmt tasks
hybrid encrypt features
crypto services
key storage
4. Encryption - decryption - signing - verifying
kerckhoffs principle
Output Feedback Mode
El Gamal
Asymmetric uses
5. Formula is public; used to creat checksums; message digests; or integrity check values
signature
Diffe Helman
data transmission
hashing algorithm strengths
6. Set symbol size usually 64 bits
algorithm
Block Cipher
substitution cipher
ECC
7. 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
symetric
Diffie-Hellman Algorithm
key mgmt mechanisms
initialization vector/salt
8. Malled online encryption or traffic flow security- implemented in hardware' encrypts all traffic in a single path
hashing algorithm
cryptography
scytale
link encryption
9. Hardware - software - and policies (security association) -
algorithm
Digital Signature Standard
Public Key Infrastructure
rounds
10. Both parties have same key(kept secret) exchage keys before comms begins; faster than asymmetric crypto; best suited for bulk encryption; N(N-1)/2 is the number of keys needed; File Encryption Key (FEK)
key mgmt tasks
Signature
Exclusive Or(XOR)
symmetric Crypto
11. First public key exchange system - users exchange keys over insecure medium.
symmetric Crypto
vigenere cipher
IDEA
Diffie-Hellman Algorithm
12. 32 to 448 bit key - Schneier
signature
Blowfish
steganography
initialization vector/salt
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
asymmetric algorithms
ECC
hashing algorithm
HMAC
14. Secret; single; conventional; session; shared; private
ECC
hashing algorithm
symetric synonyms
running key
15. Looks for patterns in ciphertext to discover the key.
RSA
frequency analysis
Asymmetric uses
Hybrid Encryption
16. Science of breakin the code
data transmission
cryptanalysis
message hashing
key clustering
17. Cert Revocation List- identifies Certs that are no longer recognized; maintained and updated periodically; Browsers use OCSP for updates.
caesar cipher
CRL
transposition/permutation cipher
Knapsack
18. Process of properly destroying keys at end of userful loife
3DES
algorithm
Block Cipher
Key zeroization
19. Measar cipher
Stream Cipher
CA
monoalphabetic
Diffie-Hellman Algorithm
20. Relies on finding weaknesses in the hashing algorithm
brute force attack on hashing
polyalphabetic
end to end enccryption
FIPS 186
21. Monsidered unbreakable- each pad made up of truly random values; used once; securely distributed- protected at sender and reciever sites
plaintext
one time pad
steganography
DES CTR
22. Secret sequence of bits and instructions used to encrypt/decrypt
Electronic Code Book
symetric synonyms
cryptovariable
3DES
23. NIST 1991 - outlines authorized algorithms
Digital Signature Standard Algorithms
substitution cipher
Digital Signature Standard
initialization vector/salt
24. RC(x) - 32 - 64 - 128 bit blocks - key max at 2048 bits
Rivest Cipher
Public Key Infrastructure
Trap Door Function
running key
25. Estimated time resources to break a cryptosystem
work factor
key space
IDEA
certificate practice statement
26. Asymmetric enc + Hash - validity of message - non repudiation
data transmission
DES
ECC
Signature
27. Modified md5 - v means "variable"
3DES
symmetric algorithms types
Symmetric Algorithms
HAVAL
28. 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"
HMAC
PKI
Lucifer
data transmission
29. Carlisle Adams and Stafford Tavares; CAST 128 64 bit block cipher-uses keys between 48 and 128 bit lengths 12 to 16 rounds of operations CAST 256 uses 48 rounds; of 128; 192; 160; 224; 256
hashing algorithm strengths
caesar cipher
4 O's
CAST
30. Block based - adds padding - same key - same clear = same ciphertext
3DES
Electronic Code Book
CA
ICV
31. Data Encryption Standard - 64 bit blocks - 56 bit key - 16 rounds - 4 modes
3DES
diffusion
DES
ECC
32. Spartans - wrapped around rod.
steganography
scytale
digital signatures
signature
33. MD5 - SHA1
DES CTR
Common Hash Algorithms
Block Cipher
historical highlights
34. Rearranges bits or bytes
collision
steganography
transposition/permutation cipher
transposition cipher
35. Data Encryption Standard (DES) 5 Block Modes; Trple DES runs through it three times; Blowfish; IDEA; RC4; RC5
DES
symmetric algorithms types
vigenere cipher
frequency analysis
36. 48 rounds - 2 or 3 keys - enc enc enc (EEE) - or enc dec enc (EDE)
3DES
Cipher Block Chaining
polyalphabetic
steganography
37. Stream cipher; stream algorithm works one bit at a time usually done in Hardware; no memory required; very fast; block cipher; works on blocks of bits; transforms into fixed length blocks; encrypted block by block 64; 128; 256 uses substitution and t
blowfish
RSA
el gamal
symmetric algorithms types
38. SHA - RSA - Eliptical Curve (ECDSA)
MD5
Digital Signature Standard Algorithms
running key
Cipher Feedback Mode
39. Hides data in images - usually by LSB (least significant bit)
concealment cipher
steganography
running key
IDEA
40. Message Authentication Code - Symmetric enc + Hash
HAVAL
HMAC
recovery agent
steganography
41. Credentials that allow verification; contains serial no; ident info; dig signature;lifetime dates;public key of the cert holder
transposition/permutation cipher
cert contents
AES
Blowfish
42. Output feedback; emulates stream cipher; similar to CFB except qty XORed; with each plaintext block; IV used as a seed; then keystream used as IV in continuing process
IDEA
Output Feedback Mode
key mgmt tasks
DES OFB
43. Cipher Feedback Emulates stream cipher data encrypted in smaller units than block size; plaintext pattersn concealed in XOR; previous ciphertext block is encrypted and output produced is conbined with plaintext block using XOR-to produce next ciphert
modular mathematics
DES CFB
birthday paradox
hybrid encrypt features
44. 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
historical highlights
DES CTR
algorithm
ECC
45. DES - 3des - aes - idea - two fish - rc4 - blow fish
cryptovariable
steganography
Symmetric Algorithms
IDEA
46. Prove knowledge of a fact to a third party without revealing the fact itself
zero knowledge proof
digital signatures
DES CTR
DES CFB
47. Encrypted data-black side
LUC
ciphertext
Hash Function Uses
message hashing
48. Each pair of entities must receive in secure fashion; requires more overhead than worth; key distro challenging- sender recievermust be on the same sheet
ONE time pad problems
PKI
Signature
Exclusive Or(XOR)
49. Attmpts to conceal data by hiding it; Used by placing information in objectssuch as graphics; sound files or document headers
steganography
Signature
cert contents
ciphertext
50. Set of mathmatical rules used in encryption
asymmetric algorithms
Cipher Block Chaining
algorithm
Knapsack