CISSP Crypto Domain

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. 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
cryptanalysis
CAST
Asymmetric uses
Symmetric Algorithms


2. 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
DES CFB
Trap Door Function
REED D asym algorithms
HMAC


3. Authenticity - integrity - digital signatures - storing passwords.
Signature
Diffie-Hellman Algorithm
rounds
Hash Function Uses


4. Scrambled version of the alphabet
polyalphabetic
key mgmt mechanisms
steganography
cryptovariable


5. key storage;escrow;archival;recovery agend;multiple key pairs
asymmetric key encryption
algorithm
transposition cipher
key mgmt tasks


6. Electronic Code Book Each block encrypted independently; 64 bits at a time; using same key; given message; always same ciphertext; susceptible to plaintext attack
blowfish
running key
vigenere cipher
DES ECB


7. Prove knowledge of a fact to a third party without revealing the fact itself
zero knowledge proof
historical highlights
steganography
steganography


8. 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
steganography
non-repudiation
Digital Signature Standard Algorithms
vernam cipher


9. 128 bit encryption; on 16 rounds of encryption; key size of 64 bits 8 parity; 56 bits long
symmetric algorithms types
Lucifer
IDEA
Diffe Helman


10. 128 bit digest
work factor
MD5
prime factorization
diffusion


11. Rearrances the bits characters or character blocks
transposition/permutation cipher
AES
collision
link encryption


12. Stream based - errors do not propagate across blocks
Cipher Feedback Mode
Elliptical Curve Cryptosystem
Output Feedback Mode
hashing algorithm


13. Data in readable format- red side
Electronic Code Book
FIPS 186
Asymmetric Enc provides
plaintext


14. Digital signature standard; performs integrity by SHA; uses DSA; RSA;Elyp CurveDSA
Key zeroization
DES OFB
kerckhoffs principle
FIPS 186


15. Formula is public; used to creat checksums; message digests; or integrity check values
substitution cipher
diffusion
transposition cipher
hashing algorithm strengths


16. Keyword: integrity
message hashing
Electronic Code Book
Elliptical Curve Cryptosystem
Hash


17. Provided by mixing key values during repeated rounds of encryption
trust model types
El Gamal
key clustering
confusion


18. One time pad - random key - one use - unbreakable
key mgmt tasks
SHA2
diffusion
vernam cipher


19. 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
initialization vector/salt
collision
DES CFB
scytale


20. 256 or 512-bit digest
Common Hash Algorithms
symmetric Crypto
SHA2
RSA


21. Estimated time resources to break a cryptosystem
DES ECB
work factor
wassenaar arrangement
REED D asym algorithms


22. Process of properly destroying keys at end of userful loife
Key zeroization
frequency analysis
Cipher Block Chaining
Knapsack


23. 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)
Diffie-Hellman Algorithm
transposition/permutation cipher
symmetric Crypto
Exclusive Or(XOR)


24. Binary operation that adds bits together; plaintext is XORed with a random keystream to generate cyphertext
monoalphabetic
Hash
Exclusive Or(XOR)
key mgmt mechanisms


25. RC(x) - 32 - 64 - 128 bit blocks - key max at 2048 bits
DES ECB
Output Feedback Mode
key mgmgt defined
Rivest Cipher


26. Message hidden within larger context.
work factor
El Gamal
concealment cipher
Signature


27. Encryption - decryption - signing - verifying
Asymmetric uses
symetric
ONE time pad problems
Key zeroization


28. 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
cryptanalysis
DES CTR
concealment cipher


29. Block based - Previous block seeds next blocks key
Cipher Block Chaining
monoalphabetic
REED D asym algorithms
symetric synonyms


30. Symmetric for Bulk Encrypt; assym for key encapsulation- used in SSL; Email; key exchange
Diffe Helman
hybrid encrypt features
symmetric Crypto
Public Key Infrastructure


31. Large set of possible values used to construct keys
concealment cipher
Key zeroization
key space
vigenere cipher


32. variable block and key sizes 128; 192; 256; uses a variable number of rounds; has low memory requirements; easy to defend against timing attacks; implemented in software; hardware is costly.
concealment cipher
AES
non-repudiation
modular mathematics


33. Based on Dif Hel; provides encrypt; dig sig; and key exchange; discrete logarithms-easy to reverse engineer; main drawback is performance- slower than other algorithms
frequency analysis
non-repudiation
wassenaar arrangement
el gamal


34. Uses asymmetric to figure out a key - symmetric used for large data encryption.
wassenaar arrangement
Hybrid Encryption
symmetric Crypto
HMAC


35. Cannot deny ownership / origination.
steganography
non-repudiation
CRL
Exclusive Or(XOR)


36. No plaintext exposure; encrypted at source; VPN; SSL ;SSH
end to end enccryption
symetric synonyms
cryptography
plaintext


37. Spartans - wrapped around rod.
scytale
El Gamal
Digital Signature Standard Algorithms
plaintext


38. Set symbol size usually 64 bits
Block Cipher
diffusion
transposition cipher
DES CBC


39. Message Authentication Code - Symmetric enc + Hash
CAST
AES
HMAC
one time pad


40. Setting policies; protecting keys; key recovery; responding to key compromise; keys long enough to prevent attack; cryptoperiod: key lifetimes
CRL
cryptography
Cipher Block Chaining
key mgmgt defined


41. Integrity
Hash
SHA2
message hashing
link encryption


42. Storage of keys and certs for extended period of time-normally performed by CA a trusted third party; or key holder
key archival
Digital Signature Standard
IDEA
confusion


43. Rearranges bits or bytes
El Gamal
DES CTR
Asymmetric Enc provides
transposition cipher


44. Science of protecting information by encoding it
historical highlights
cryptanalysis
cryptography
plaintext


45. Public algorithm - private key.
CA
CAST
kerckhoffs principle
asymmetric algorithms


46. Provided by mixing up the location of plaintext throughout the cipher
algorithm
key mgmgt defined
diffusion
Block Cipher


47. Instance when two keys keys generate the same ciphertext from same plaintext
Common Hash Algorithms
LUC
DES OFB
key clustering


48. Science of breakin the code
Key zeroization
key space
cryptanalysis
substitution cipher


49. Replaces bits characters and block s with differecnt values
RiJndael(AES)
substitution cipher
Stream Cipher
RSA


50. NIST and NSA - 160 bit digest
substitution cipher
symmetric algorithms types
Block Cipher
SHA1