Hashing

Question 1

When 2 hashes of different data provide the same hash

Answer 1

collision

Question 2

_____ length plaintext input is hashed into a _____ length output value

Answer 2

variable; fixed

Question 3

128 bit fixed length hash
Has collisions
Still widely used

Answer 3

MD5 (message digest 5)

Question 4

Supposed to replace MD5, but SHA2/3 was better
Withdrawn due to flaws

Answer 4

MD6 (message digest 6)

Question 5

Hashing protects what part of CIA

Answer 5

Integrity

Question 6

160 bit hash value
Found to have weak collision avoidance
Still commonly used

Answer 6

SHA1

Question 7

Considered collision resistant
Somewhat used now but still relatively new

Answer 7

SHA2

Question 8

Finalized in 2015

Answer 8

SHA3

Question 9

The MD5 length is (128, 169, 192, 224, 256 bits)
Not widely used

Answer 9

HAVAL (hash of variable length)

Question 10

Developed outside of government defense to prevent government backdoors

Not widely used
No longer secure

Answer 10

RIPEMD

Question 11

Redesigned, fixing flaws of RIPEMD
160 bit hashes
Not widely used
Considered secure

Answer 11

RIPEMD160

Question 12

Defends against dictionary attacks or rainbow tables by adding additional random data at the end of a hash

Answer 12

Salting

Question 13

An arbitrary number only used once. Random numbers used in authentication protocols to protect against replay attacks

Answer 13

Nonce