Computer Science for IGCSE & O level - Data Transmission (Section 9 - No. 46)
What is a key used for in data encryption?
To make the data smaller.
To transform data into an unreadable format.
To verify the sender's identity.
To detect errors during transmission.
ব্যাখ্যা
A key is used to scramble and unscramble data, making it secure.