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Cybersecurity training - Cryptography 2

Total questions: 13

Worksheet time: 10mins

Name

Class

Date

Please choose the algorithm that requires the least resources to encrypt/decrypt

AES

RSA

ECC

DSS

Reorder the following steps of Deffie-Hellman Key Exchange process

Agree on prime and generator

Generate a private key

calculate public key

Exchange public keys

calculate shared secret key

the blowfish encryption requires public key exchange

True

False

you want to choose an algorithm to encrypt your data (at rest) with security and performance in mind

AES-ECB

AES-CBC

AES-CTR

RSA

DSS

Match the following

RSA

asymmetric encryption algorithm

blowfish

symmetric encryption algorithm

HMAC

message authentication

chacha20

a stream cipher

PKI

used to validate identity

Bob is sending Alice a message, what key does he need to sign the message

Bob's public

Bob's private

Alice's public

Alice's private

Alice is sending Bob a message, what key does she need to encrypt the message

Bob's public

Bob's private

Alice's public

Alice's private

using PKI, you can check if the certificate is revoked using

CLI

CRL

OCSP

OSCP

encryption and authentication of HTTPS servers relies on

Server certificate

PKI

DES

HTML

10.

The certificate life cycle includes

Enrollment

Distribution

Validation

Revocation

Disposal

11.

The decryption equation for RSA is

$C=M^emod\ n$

$M=C^dmod\ n$

$K\ =\ g^{ab}\ mod\ p$

$A\ =\ g^a\ mod\ p$

12.

Bob is receiving Alice a signed message, what keys does he need

Bob's public

Bob's private

Alice's public

Alice's private

13.

AES-EBC default block size is

8bits

64bits

128bits

256bits

100 %

Cybersecurity training - Cryptography 2

Total questions: 13

Worksheet time: 10mins

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