Back to marketplace

1.3.1 Compression, Encryption And Hashing

No description yet. This curated deck is ready for daily study.

Total cards: 7•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (7)

#1
Front (Question)

Lossy compression

Back (Answer)

Removes non essential information. E.g reducing pixels in a image

#2
Front (Question)

Lossless compression

Back (Answer)

Reduces file size but retains all data by recording patterns in data

#3
Front (Question)

Length encoding

Back (Answer)

Looks for blocks of repeated data

#4
Front (Question)

Dictionary coding

Back (Answer)

Using short code words to represent longer pieces of data

#5
Front (Question)

Symmetric encryption

Back (Answer)

Uses a secret key to encrypt and decrypt data

#6
Front (Question)

Asymmetric encryption

Back (Answer)

Uses two separate but related keys. A public and private key. The public key is used to encrypt data sent to you and the private key, that only you know, is used to decrypt the data

#7
Front (Question)

Hashing

Back (Answer)

A technique that allows you to ‘map’ data of variable length into a fixed length data value (a large number)