Cryptography - An Overview

What is Cryptography?

• The practice of protecting systems, networks, and programs from digital attacks.

• The practice of protecting computer systems from unauthorized access.

• A method of protecting information and communications through the use of code, so that only those for whom the information is intended can read and process it.

Those that practice cryptography are called what?

Which of these is not one the 4 main standards of cryptography?

• Authentication

• Non-repudiation

• Confidentiality

• Availability

Answer explanation

Correct - the missing standard was Integrity

Select any of the following that algorithms are used for in Cryptography Techniques.

• Digital Signing

• Cryptographic Key Generation

• Encryption/Decryption

• Web Browsing

What is an unencrypted message or clear message.

What is Ciphertext?

• The art of cracking encryption

• An unencrypted message

• The algorithm used to encrypt and/or decrypt

• An encrypted message

Which answer describes a Single-Key Encryption Algorithm?

• Create a fixed length of bits called block cipher with a secret key that the creator/sender uses to encrypt data and the receiver uses to decipher it.

• Use a pair of keys.  One is a public key associated with the creator/sender for encrypting messages. 

  One is a private key that only the originator knows (unless exposed or shared) for decryption.

What is another name for Single-Key Encryption Algorithms?

What is another name for Public-Key Encryption Algorithms?

What type of encryption does WhatsApp use?

• Single-Key

• Public-Key

• Both

• Neither