Asymmetric Encryption

Question 1

In asymmetric encryption, what keys are used?

Answer 1

A paired public and private key

Question 2

RSA

Answer 2

Secure asymmetric encryption using a minimum of 1,024 bit keys. Frequently used for digital signatures in e-mail. Uses a paired public and private key. Uses a static key.

Question 3

What are static keys?

Answer 3

Semipermanent, can stay the same over a long period of time.

Question 4

What are ephemeral keys?

Answer 4

Includes a private and public ephemeral key, re-created for each session.

Question 5

What is Perfect forward secrecy?

Answer 5

PFS, indicates that random public keys are created for each session.

Question 6

Where is Elliptic curve cryptography used?

Answer 6

Small wireless devices; does not take much processing power.

Question 7

What is Diffie-Hellman?

Answer 7

Key exchange algorithm used to share a symmetric key between 2 parties. Supports static and ephemeral keys.

Question 8

What is DHE?

Answer 8

Diffie-Hellman Ephemeral, uses ephemeral keys, and generates new keys for each session.

Question 9

What is ECDHE?

Answer 9

Elliptic Curve DHE, uses ephemeral keys generated using ECC.

Question 10

What is ECDH?

Answer 10

Elliptic Curve DH, uses ECC to generate static keys