
_______encryption uses the same key to encrypt and decrypt.
Symmetric

________encryption solves the key distribution problem.
Asymmetric

Which type of encryption is slower than the other?
Asymmetric is 100 times slower than Symmetric

_______ encrypt one character of data at a time.
Stream Ciphers

What are the two types of Ciphers?
Block and Stream

AES
what is the block size and key size
 Advanced Encryption Standard
 block size 128 key size 128, 192, and 256

____ is the concept that a sender cannot deny sending a message.
Nonrepudiation

____ provides integrity to a message being sent.
Hashing

_____ and ____ are the most common hashing algorithms.
MD5 and SHA1

____ Provides Authenticity to Hashed messages.
HMACHashed based Message Authentication Code

Explain the following:
MD5
SHA1
SHA2
HMACMD5
HMACSHA1
 MD5creates 128bit hashes
 SHA1creates 160bit hashes
 SHA2 creates 224,256,384, or 512bit hashes
 HMACMD5 creates 128bit hashes while authenticating
 HMACSHA1 creates 160bit hashes while authenticating

____ is a symmetric block cipher that was widely used for many years, dating back to 1970's. It encrypts data in 64bit blocks.
DES (Data Encryption Standard)

_____is a strong symmetric block cipher that encrypts data in 128bit blocks.
AES (Advanced Encryption Standard)

What are some uncommonly used Hashing Algorithms
RIPEMD, LANMAN, NTLM

Cryptography provides 4 essential services which are ______?
 Confidentiality
 Integrity
 Authentication
 Nonrepudiation

_____ is considered the fastest of the symmetric algorithms.
Blowfish

IDEA
 International Data Encryption Algorithm
 64bit block cipher
 128bit key length

