Authenticated Encryption vs Encrypt-then-MAC

Developers should use Authenticated Encryption when handling sensitive data that requires both privacy and integrity, such as in secure communications (e meets developers should use encrypt-then-mac when building systems that require both data confidentiality and integrity, such as in secure messaging apps, financial transactions, or api communications. Here's our take.

Authenticated Encryption

Nice Pick

Developers should use Authenticated Encryption when handling sensitive data that requires both privacy and integrity, such as in secure communications (e

Pros

• g
• Related to: cryptography, symmetric-encryption

Cons

• Specific tradeoffs depend on your use case

Encrypt-then-MAC

Developers should use Encrypt-then-MAC when building systems that require both data confidentiality and integrity, such as in secure messaging apps, financial transactions, or API communications

Pros

• It prevents attacks like padding oracle exploits and ensures that any tampering with encrypted data is detected before decryption, making it safer than alternatives like MAC-then-encrypt or encrypt-and-MAC
• Related to: cryptography, message-authentication-codes

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use Authenticated Encryption if: You want g and can live with specific tradeoffs depend on your use case.

Use Encrypt-then-MAC if: You prioritize it prevents attacks like padding oracle exploits and ensures that any tampering with encrypted data is detected before decryption, making it safer than alternatives like mac-then-encrypt or encrypt-and-mac over what Authenticated Encryption offers.

The Bottom Line

Authenticated Encryption wins

Developers should use Authenticated Encryption when handling sensitive data that requires both privacy and integrity, such as in secure communications (e