Is there a way to hide all data on a computer?

Question

Information Security

Hello!
Interested in this question. Let's imagine a situation that there is some kind of conditional person who interferes with politicians, or corporations, or special services, or Jewish Masons. To anyone. Is there such an encryption scheme (I read about such things a long time ago) that encrypts data on a computer in such a way that someone who gets his work computer or laptop cannot find, see, open, view anything without a password, etc. .

Answer 1

type in Yandex "Encryption of the operating system in TrueCrypt"