What encryption algorithms are used to protect data when using the HTTPS protocol?
sobes.tech AI
Answer from AI
To protect data, HTTPS protocol uses combinations of various encryption algorithms that ensure confidentiality, integrity, and authentication. The main types of algorithms:
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Symmetric encryption — used for encrypting transmitted data after establishing a secure connection. Commonly used are AES (Advanced Encryption Standard) with different key lengths (128, 192, 256 bits).
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Asymmetric encryption — used for key exchange and server (and client) authentication. Typically, RSA or elliptic curve algorithms (ECDSA, ECDH) are used.
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Hash functions and MAC (Message Authentication Code) — used to verify data integrity and protect against tampering. For example, SHA-256 combined with HMAC.
In the TLS (Transport Layer Security) process, which underpins HTTPS, key exchange occurs first using asymmetric algorithms, then a common symmetric key is established for session encryption using AES or similar algorithms.
Example set of algorithms in TLS:
- RSA or ECDHE for key exchange
- AES-GCM for symmetric encryption
- SHA-256 for hashing
Thus, HTTPS employs a hybrid approach, combining the strengths of different algorithms to ensure security.