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TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384

TLS 1.2 | 256-bit + Forward Secrecy Recommended

Cipher Suite Details

Cipher Suite Name
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
Hex Value
0xC02C
Decimal Code
49196
TLS Version
TLS 1.2
Security Level
256-bit + Forward Secrecy
Recommended
Yes

What is TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384?

TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 is the high-security variant combining ECDSA certificates, ECDHE key exchange, and AES-256-GCM encryption. This provides 256-bit security throughout: ECDSA uses P-256 or P-384 curves, ECDHE uses matching curves, and AES-256-GCM encrypts data. SHA-384 is used for key derivation. This cipher suite is suitable for highly sensitive applications requiring long-term secrecy. The combination of ECDSA certificates and AES-256 is recommended for government and military use (NSA Suite B at the 256-bit security level).

Role in JA3 Fingerprinting

The TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 cipher suite is part of the TLS Client Hello that JA3 analyzes. Cipher suite order and selection are key indicators of browser type and version.

JA3 Format: TLS_VERSION,CIPHERS,EXTENSIONS,CURVES,POINT_FORMATS

Different browsers prioritize different cipher suites (Chrome prefers ChaCha20 on mobile, Firefox prioritizes AES-GCM, etc.), making cipher suite ordering a reliable fingerprint.

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See which cipher suites your browser advertises, including TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384.

Technical References