Encryption
Encryption is a method of protecting information by converting it into a secret format that cannot be read without a special key. It helps keep data safe from unauthorized access.
How it works
When data is encrypted, it is transformed using a mathematical algorithm. Only someone with the correct decryption key can turn the data back into its original, readable form.
If encrypted data is intercepted, it appears as random and meaningless symbols.
Where encryption is used
Encryption is commonly used in:
- secure websites (HTTPS)
- messaging apps
- online payments
- file and disk protection
It is a core part of modern internet security.
Types of encryption
Some common types include:
Symmetric encryption — the same key is used to encrypt and decrypt data
Asymmetric encryption — uses a public key and a private key
Both methods help protect information in different situations.
Why encryption is important
Encryption helps:
- protect personal data
- secure communication
- prevent data theft
- keep information private
Without encryption, sensitive data could be easily read by attackers.
Simple example
Encryption is like locking a message in a box that only the person with the correct key can open.
Related terms
- What is HTTPS?
- What is VPN?
- What is Ransomware?
Source
Information simplified from the Wikipedia article “Encryption”.