Cybersecurity training - Cryptography 2

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

• calculate shared secret key

• Generate a private key

• Exchange public keys

• calculate public key

• Agree on prime and generator

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

• symmetric encryption algorithm

• HMAC

• a stream cipher

• chacha20

• used to validate identity

• RSA

• asymmetric encryption algorithm

• PKI

• message authentication

• blowfish

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

The certificate life cycle includes

• Enrollment

• Distribution

• Validation

• Revocation

• Disposal