# Encryption

#### Understanding Encryption

**Encryption**is a process used to ensure confidentiality and integrity of data by transforming plaintext information into unreadable ciphertext.- It uses predefined algorithms or ciphers and keys to convert data and make it secure from unauthorised access.

#### Types of Encryption

- Two main types of encryption exist:
**Symmetric Encryption**and**Asymmetric Encryption**. **Symmetric Encryption**uses the same key for both the encryption and decryption process.**Asymmetric Encryption**, also known as Public Key Encryption, uses two different keys - a public key for encryption and a private key for decryption.

#### Encryption Algorithms and Ciphers

- There are many encryption algorithms and ciphers, including DES, AES, RSA, and Blowfish.
**DES (Data Encryption Standard)**is an older symmetric encryption method which is considered to be less secure than newer methods.**AES (Advanced Encryption Standard)**is a symmetric encryption that is widely used due to its high level of security.**RSA (Rivest-Shamir-Adleman)**is an example of an asymmetric encryption algorithm.

#### Importance of Key Length

- The
**length of the encryption key**determines the possible combinations required to crack the encryption. The longer the key, the more secure the encryption. - However, longer keys also require more processing power to encrypt and decrypt the data.

#### Encryption in Network Security

**SSL/TLS**encryption is used to secure website traffic and protect sensitive transactions online.**VPN (Virtual Private Network)**uses encryption to create a secure connection over a less secure network, like the internet.

#### Impacts of Encryption on Performance and Storage

- Encryption typically adds overhead to the data, leading to an increase in storage requirements.
- Additionally, the encryption and decryption process can reduce system performance due to increased processing requirements.

#### Significance of Encryption in Computing

- Understanding and correctly implementing encryption is vital for maintaining data privacy and security in many areas of computing, such as
**cybersecurity**,**database management**, and**web development**. - Working with encryption requires a firm grasp of
**mathematics**and**computer science concepts**, as it underpins topics like algorithm design and network security.