Cryptography
Cryptography is the technical science that studies how to encrypt and decrypt information. Simply put, it's about figuring out how to hide information so others can't understand it, and how to restore the hidden information.
Cryptography is the technical science that studies how to encrypt and decrypt information. Simply put, it's about figuring out how to hide information so others can't understand it, and how to restore the hidden information.
Everything is a system, and every system contains systerms.