Ceh Encryption 2

Front 1

Public encrypts; private decrypts in what encryption type?

Back 1

Asymmetric encryption

Front 2

Function which creates a signature of a file. Helps in proving integrity.

Back 2

Hash function

Front 3

Study of protecting information, whether in transit or at rest.

Back 3

Cryptography

Front 4

Data to be encrypted.

Back 4

Plaintext

Front 5

In cryptography, the term for encrypted data

Back 5

Ciphertext

Front 6

Rendering sender unable to deny they sent something.

Back 6

Nonrepudiation

Front 7

Cipher method in which bits are encyrpted one bit at a time.

Back 7

Stream Cipher

Front 8

Encrypted in sets of data, usually 64 bits at a time

Back 8

Block cipher

Front 9

Substitution and transposition are algorithms used in which encryption method.

Back 9

Block Cipher

Front 10

Primary algorithm used in stream cipher.

Back 10

XOR operation

Front 11

Speed is a benefit of which encryption method.

Back 11

Symmetric

Front 12

XOR Operation weakness

Back 12

If the key is smaller than the data, successful cryptanalysis is possible via frequency attack

Front 13

De Facto encryption standard

Back 13

RSA

Front 14

multiplies two prime numbers.

Back 14

RSA

Front 15

Key size up to 4096

Back 15

RSA

Front 16

Used for encryption and digital signatures

Back 16

RSA

Front 17

Key Escrow

Back 17

Repository for government encryption access when there are legal issues, such as subpoenas

Front 18

Asymmetric encryption disadvantage

Back 18

Requires large encryption keys.

Front 19

IDEA

Back 19

used mainly in Europe

Front 20

RC

Back 20

Rivest Cipher

Front 21

RC4 cypher type

Back 21

Stream

Front 22

RC5 cipher type

Back 22

block

Front 23

RC6 cipher type

Back 23

Block

Front 24

Symmetric Encryption AKA (4)

Back 24

Single / secret / shared / private

Front 25

Symmetric Encryption drawbacks (2)

Back 25

Key sharing is complicated / Scalability

Front 26

Typical data block size of symmetric key encryption

Back 26

64 bits

Front 27

Encryption method which replaces character with another character, or bit with another bit.

Back 27

Substitution

Front 28

Transposition (def)

Back 28

Scramble the characters

Front 29

Diffie-Hellman encryption type

Back 29

asymmetric

Front 30

Diffie-Hellman used in which two protocols

Back 30

Encryption used in IPSEC and SSL protocols

Front 31

Diffie-Hellman vulnerable to...

Back 31

Vulnerable to man-in-the-middle attacks (MITM) when digital signature use is waived

Front 32

ECC

Back 32

Elliptic Curve Cryptosystem

Front 33

Elliptic Curve Cryptosystem (ECC)used on what devices?

Back 33

Encryption method used by mobile devices

Front 34

Elliptic Curve Cryptosystem (ECC) benefit

Back 34

Uses less computational power

Front 35

El Gamal (difference from RSA)

Back 35

Encryption method not based on prime number factoring

Front 36

El Gamal algorithm

Back 36

Uses discrete logarithm problems for encryption and digital signatures

Front 37

First government accepted digital signature scheme

Back 37

DSA

Front 38

First government accepted digital signature scheme; it meets Digital Signature Standard (DSS), one of the Federal Information Processing Standards (FIPS)

Back 38

DSA

Front 39

Hash function(definition)

Back 39

Any algorithm that maps data of variable length to data of a fixed length

Front 40

Results of hashing function (5 synonyms)

Back 40

hashes, hash values, hash codes, hash sums, checksums

Front 41

Used to crack a hash algorithm

Back 41

Collision attack

Front 42

Collision (hash, definition)

Back 42

When 2 or more files create the same output from a hash function

Front 43

PKI

Back 43

Public Key Infrastructure

Front 44

CA

Back 44

Certificate authority

Front 45

RA

Back 45

Registration Authority

Front 46

Trust Models (3)

Back 46

Web of Trust / Single authority System / Hierarchical Trust System

Front 47

Web of Trust

Back 47

User trust certificates they have exchanged with another person, and further they trust everyone who the other person trusts and so on

Front 48

Single authority System

Back 48

There is one entity which holds all certificates-the Certificate Authority

Front 49

Hierarchical Trust System

Back 49

There is a certificate authority at the top and then all the entities below it which are trusted by the certificate authority to do their job on their behalf

Front 50

Fields in a digital certificate (8)

Back 50

Public key, Serial Number, Subject/Algorithm, Issuer, Valid From date, Valid To date, Key Usage (purpose of use), optional fields

Front 51

Current PKI world standard version number

Back 51

X.509

Front 52

key size is deemed by the US government as uncrackable

Back 52

256

Front 53

Avenues of encrypted communications

Back 53

(SSIP) Secure shell (SSH) / Secure Socket Layer (SSL) / Internet Protocol Security (IPSec) / Point-to-point tunneling Protocol (PPTP)

Front 54

Two things to ensure your encryption is effectively uncrackable

Back 54

Use a large key, Change the key on a regular basis

Front 55

Encryption algorithms turn what into what?

Back 55

Plaintext into ciphertext

Front 56

When both parties cannot deny the message was sent /received

Back 56

Non-repudiation

Front 57

Encryption method which cannot be broken if the message is truly random, used only once and has no repeating patterns

Back 57

One-time pad

Front 58

Name three problems which symmetric encryption algorithms have that asymmetric encryption algorithms do not

Back 58

Scalability issue / key exchange issue / lack of non-repudiation