VCE Cyber Security Definitions Worksheet: Software malware updates to RSA (Modules 41–50)
Name:
Date:
Class:
✎
Key terms
Write what each term means, in your own words.
1
Malware definition update
2
Staff procedure
3
Encryption
4
Caesar cipher
5
Polyalphabetic cipher
6
Vigenere cipher
7
Symmetric encryption
8
AES
9
Asymmetric encryption
10
RSA
Answer Key
VCE Cyber Security · Modules 41–50 · Student wording will vary for definitions
1Malware definition update — Refreshing the database used by security software so it can recognise and detect newly discovered threats.
2Staff procedure — A documented rule employees must follow, such as reporting incidents or locking devices, to reduce cyber security risk.
3Encryption — Turning a readable message into a scrambled, unreadable message using a key, so it can only be read again with decryption.
4Caesar cipher — A cipher that encrypts a message by shifting each letter forward by a fixed number, and decrypts it by shifting each letter back by the same number.
5Polyalphabetic cipher — A cipher that uses a repeating list of shift numbers, so different letters in a message are shifted by different amounts.
6Vigenere cipher — A cipher that uses a keyword, where each keyword letter sets a different shift for the matching letter of the message.
7Symmetric encryption — Using the exact same secret key to both lock and unlock a message.
8AES — A widely used method of symmetric encryption that uses one shared key, which can be 128, 192, or 256 bits long, to lock and unlock data.
9Asymmetric encryption — Encryption that uses a linked pair of keys: a public key to encrypt data and a private key to decrypt it, with no shared secret key needed.
10RSA — A way of locking and unlocking messages using two matching keys: a public key anyone can have, and a private key kept secret by its owner.