Computer Science for IGCSE & O level - Data Transmission (Section 8 - No. 25)
When data is encrypted, which of the following happens to the data?
Its size is reduced.
It is transformed into an unreadable format.
It is made accessible to everyone.
Its transmission speed is increased.
Giải thích
Encryption is the process of scrambling data to make it unreadable without the correct key.