Unit 4 Flashcards
What is Asymmetric Cryptography?
When encryption deals with a private key to decrypt a message (only to one other person) and a public key that is distributed to everyone
What is a cipher?
The generic term for a technique (or algorithm) that performs encryption
What is Caesar’s cipher?
A technique used for encryption that shifts the alphabet by some number of characters
What is the random substitution cipher?
An encoding technique that maps each letter of the alphabet randomly to different letters or characters
What is cracking encryption?
When you attempt to decode a secret message without knowing all the specifics of the cipher you are trying to crack
What is the Vingénère cipher?
A method of encrypting text by applying a series of Caesar ciphers based on the letters of a keyword
What does it mean if something is “computationally hard”?
A “hard problem for a computer is one in which it cannot arrive at a solution in a reasonable amount of time
What is Modulo?
Mod, or the name of the mathematical operation. Modulo gives the remainder from diving two numbers
What is a public key?
A value that can be used to encrypt a message. However, only when combined with a mathematically related key can the message be decrypted
What is a private key?
The complementary key to a public key that is used to decrypt a message
What is symmetric encryption?
When the same key is used to encrypt and decrypt messages
What is SSL?
Secure Sockets Layer, used to protect data and make sure no one could get the data
What is TLS?
Transport Layer Security, similar to SSL but newer and more secure
What is Spear Phishing?
Targeted phishing attacks towards a specific individual
What is whaling?
Targeted phishing attacks on a CEO, president of a company, etc.
