What is a summary of encryption??
A way of making sure data cannot be understood if you don’t possess the means to decrypt it.
What is a Ceasar cipher??
A method of encryption where you shift the letters along by a consistent amount.
What is a brute-force attack??
Where you attempt every possible key to decrypt ciphertext until one works.
What is another name for a one-time pad??
A Vernam cipher
What is another name for a Vernam cipher??
A one-time pad
What is a Vernam cipher??
Where a random one-time pad greater or equal in length to the plaintext is exchanged and used to encrypt a message.
What is the advantage to a Vernam cipher??
It is completely unbreakable.
Why can’t you use a one-time pad multiple times??
Because eventually the message will be able to be decrypted with frequency analysis.
What’s an example decoding scheme for a Vernam cipher??
Do an XOR with all the bits of the message and the key.
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date: 2020-10-16 12:31
tags:
- '@?computing'
- '@?school'
- '@?public'
- '@?safe-to-post-online'
title: Computing - Encryption