Encryption
Encryption is the act of turning information that you and I can read, into code. The idea is that only the person with the key to decipher (decrypt) the code will be able to read the code. Encryption is used to protect confidential information. Encryption can also be used nefariously, for example, by cyber criminals to block access for files or computer systems in ransomware attacks.
Read an article: What is Ransomware?