Data Encryption. #DataIntegration, #DatabaseManagement, #SQL, #PowerBI, #Tableau, #datareporting

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What is Data Encryption?

Encryption is the process of converting readable data (plaintext) into an unreadable format (ciphertext) using an algorithm and a key. Only someone with the correct key can decrypt the ciphertext back into plaintext.

Purpose:

Confidentiality: Only authorized parties can access the data.

Integrity: Helps detect if data has been tampered with.

Authentication: Certain encryption methods can also verify the sender's identity.

2. Types of Encryption
a. Symmetric Encryption

Uses one key for both encryption and decryption.

Fast and efficient for large data.

Drawback: Secure key exchange is difficult.

Examples:

AES (Advanced Encryption Standard)

DES (Data Encryption Standard)

ChaCha20

b. Asymmetric Encryption

Uses a pair of keys: public key (encrypt) and private key (decrypt).

Solves the key exchange problem but slower than symmetric.

Examples:

RSA

ECC (Elliptic Curve Cryptography)

ElGamal

c. Hybrid Encryption

Combines symmetric and asymmetric encryption.

Asymmetric encryption is used to securely exchange a symmetric key.

Widely used in secure communication protocols like HTTPS.

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