Test your basic knowledge |

CISSP Crypto Domain

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. First public key exchange system - users exchange keys over insecure medium.
key mgmt tasks
4 O's
Public Key Infrastructure
Diffie-Hellman Algorithm

2. Block based - Previous block seeds next blocks key
Asymmetric Enc provides
Cipher Block Chaining
historical highlights
Hybrid Encryption

3. Secret sequence of bits and instructions used to encrypt/decrypt
cryptovariable
PKI
certificate practice statement
Diffie-Hellman Algorithm

4. Set of mathmatical rules used in encryption
key escrow
algorithm
symmetric algorithms types
Block Cipher

5. When a hash fuunction generates same output for same input
HMAC
collision
non-repudiation
Elliptical Curve Cryptosystem

6. Hardware - software - and policies (security association) -
SHA2
PKI
HMAC
Public Key Infrastructure

7. 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
historical highlights
El Gamal
trust model types
ciphertext

8. 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
3DES
LUC
recovery agent
OCSP

9. Broken
key escrow
cryptography
Knapsack
hybrid encrypt features

10. One time pad - random key - one use - unbreakable
caesar cipher
vernam cipher
CAST
symetric synonyms

11. Polyalphabetic - substitution - 2d grid of alphabet
Diffie-Hellman Algorithm
vigenere cipher
confusion
Digital Signature Standard Algorithms

12. 128 bit digest
key mgmt mechanisms
concealment cipher
MD5
initialization vector/salt

13. Link Encryption and end to end encryption
data transmission
IDEA
caesar cipher
Digital Signature Standard

14. CIA plus non repudiation
crypto services
4 O's
Trap Door Function
Blowfish

15. Simple substitution - ROT-n - mono-alphabetical.
DES CTR
el gamal
caesar cipher
Cipher Block Chaining

16. Estimated time resources to break a cryptosystem
message hashing
work factor
Diffe Helman
Hybrid Encryption

17. RSA
frequency analysis
key storage
recovery agent
prime factorization

18. Similar to RSA - very efficient for low end hardware/limited processing power.
MD5
Elliptical Curve Cryptosystem
RSA
caesar cipher

19. Monsidered unbreakable- each pad made up of truly random values; used once; securely distributed- protected at sender and reciever sites
cryptovariable
one time pad
end to end enccryption
CA

20. One-way - difficult to solve - uses factorization - private key can compute the public key
prime factorization
crypto services
Trap Door Function
Hybrid Encryption

21. Binary operation that adds bits together; plaintext is XORed with a random keystream to generate cyphertext
OCSP
blowfish
rounds
Exclusive Or(XOR)

22. First public key algorithm; not used for message encrypt or digital signatures; uses large prime numbers; requires both sender and reciever to have key pairs; vulnerable to man in the middle attacks
AES
Diffe Helman
Trap Door Function
DES CBC

23. Relies on finding weaknesses in the hashing algorithm
non-repudiation
historical highlights
Asymmetric uses
brute force attack on hashing

24. Replaces bits characters and block s with differecnt values
steganography
OCSP
substitution cipher
key escrow

25. Digital signature standard; performs integrity by SHA; uses DSA; RSA;Elyp CurveDSA
FIPS 186
vernam cipher
prime factorization
Stream Cipher

26. 256 or 512-bit digest
Cipher Feedback Mode
SHA2
key mgmgt defined
confusion

27. Mipher added to plaintext to encrypt
FIPS 186
running key
RSA
transposition cipher

28. Buries a message by taking the least significant bit of evvery byte to carry the message; hide a message in another message. Graphics; sound files; alternated used in corporate espionage
cryptanalysis
hashing algorithm
zero knowledge proof
steganography

29. Each pair of entities must receive in secure fashion; requires more overhead than worth; key distro challenging- sender recievermust be on the same sheet
Hash
ONE time pad problems
algorithm
polyalphabetic

30. 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
Common Hash Algorithms
confusion
key clustering

31. RC(x) - 32 - 64 - 128 bit blocks - key max at 2048 bits
CRL
Rivest Cipher
CA
LUC

32. Keyword: integrity
birthday paradox
DES CTR
El Gamal
Hash

33. Data in readable format- red side
CBC MAC
Hash
Trap Door Function
plaintext

34. Rearranges bits or bytes
Exclusive Or(XOR)
steganography
MD5
transposition cipher

35. Cert Revocation List- identifies Certs that are no longer recognized; maintained and updated periodically; Browsers use OCSP for updates.
Rivest Cipher
Trap Door Function
CRL
rounds

36. 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"
plaintext
end to end enccryption
PKI
Output Feedback Mode

37. Measar cipher
monoalphabetic
LUC
Elliptical Curve Cryptosystem
symetric

38. Function that takes a variable length string; and compresses and transforms it into a fixed length- output called a hash or message digest
hashing algorithm
DES
Elliptical Curve Cryptosystem
DES CFB

39. 128 bit encryption; on 16 rounds of encryption; key size of 64 bits 8 parity; 56 bits long
Lucifer
hybrid encrypt features
Blowfish
DES

40. Provided by mixing up the location of plaintext throughout the cipher
diffusion
OCSP
Diffe Helman
rounds

41. Prove knowledge of a fact to a third party without revealing the fact itself
Digital Signature Standard Algorithms
cryptovariable
zero knowledge proof
ECC

42. Rearrances the bits characters or character blocks
substitution cipher
symetric synonyms
transposition/permutation cipher
running key

43. 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
Hash Function Uses
HMAC
DES CFB
IDEA

44. Science of protecting information by encoding it
cryptography
hybrid encrypt features
key mgmt tasks
Rivest Cipher

45. MD5 - SHA1
Common Hash Algorithms
RiJndael(AES)
MD5
Exclusive Or(XOR)

46. Uses asymmetric to figure out a key - symmetric used for large data encryption.
cryptography
IDEA
Asymmetric Enc provides
Hybrid Encryption

47. Setting policies; protecting keys; key recovery; responding to key compromise; keys long enough to prevent attack; cryptoperiod: key lifetimes
key mgmgt defined
ECC
Rivest Cipher
AES

48. Study of both cryptography and cryptanalysis
cryptology
Rivest Cipher
kerckhoffs principle
Block Cipher

49. Published document describing: howa CA is structured;which standards are used and how certs are managed
running key
Hash
LUC
certificate practice statement

50. Instance when two keys keys generate the same ciphertext from same plaintext
IDEA
key clustering
transposition cipher
zero knowledge proof