Authenticated Encryption (AEAD)

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A visual representation of the AES-GCM Algorithm

Authenticated Encryption (AEAD) Intermediate

AES-GCM: Authenticated Encryption

AES-GCM does two jobs at once: it hides your data AND proves nobody tampered with it. Learn how Galois/Counter Mode combines AES with GHASH authentication to become the default choice for TLS, IPsec, and disk encryption.

August 4, 2026

A visual representation of the ChaCha20-Poly1305 Algorithm

Authenticated Encryption (AEAD) Intermediate

ChaCha20-Poly1305: The Mobile-Friendly AEAD

TLS 1.3's second mandatory cipher suite pairs ChaCha20 encryption with the Poly1305 message authenticator, delivering AES-GCM-equivalent security without needing any special hardware. Here's how the pairing works.

August 4, 2026