a)invalid
b)erased
c)encoded
d)ifected with a virus
2007-08-25 08:26:06 · 3 answers · asked by muffintops 2 in Business & Finance ➔ Careers & Employment ➔ Other - Careers & Employment
c) encoded
2007-08-25 08:36:59 · answer #1 · answered by gene177 2 · 1⤊ 0⤋
c)encoded
Encryption Systems
Computer encryption is based on the science of cryptography, which has been used throughout history. Before the digital age, the biggest users of cryptography were governments, particularly for military purposes.
The existence of coded messages has been verified as far back as the Roman Empire. But most forms of cryptography in use these days rely on computers, simply because a human-based code is too easy for a computer to crack.
2007-08-25 15:35:03 · answer #2 · answered by Helpfulhannah 7 · 1⤊ 0⤋
Obviously, you are not qualified if you can't answer these questions yourself.
2007-08-25 15:36:19 · answer #3 · answered by machupi1 3 · 0⤊ 1⤋