This test is run by .
Note that your final mark will not be saved in the system.
Note that your final mark will not be saved in the system.
5. Compression, Encryption and Hashing MatchUp
Target Level
C
Running Total
0
0%
Attempt
1 of 3
Click on a top box, then click on its match below. Or, drag a top box and drop it onto the correct match. Match all pairs before clicking ‘Check’.
Lossy
Public key
Asymmetric
Record key
JPEG
Symmetric
Private key
Hashing
BMP
Dictionary coding
PNG
Lossless
MP3
WAV
An audio file which has been compressed in such a way that some frequency ranges are no longer stored in full.
A form of encryption in which there is a single key, which is used in both encryption and decryption.
A likely input to a hashing algorithm where that hashing algorithm manages storage of a file in a random-access system.
A generic term referring to any form of compression in which the original data can be precisely restored using the compressed data.
A form of encryption wherein the data item used to encrypt is different from, yet related to, the corresponding data item needed to decrypt the data.
A form of lossless compression which uses an index to reference each distinct data item that exists within a file. The compressed file contains these references, rather than the original data items.
A piece of data used to encrypt data in such a way that it can be decrypted only by the intended recipient.
An audio file which is uncompressed.
An image format that uses lossy compression.
A generic term for any means of compression that does not result in all data being retrievable from the compressed format.
An image file format that uses lossless compression.
A piece of data that is used to decrypt data that has previously been encrypted.
A one-way process that uses a mathematical function to scramble data into a fixed-length value.
An uncompressed image file format in which each pixel is stored individually and independently from all other pixels.