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ffdhe6144

FFDHE | Security: ~176 bits | Code: 259

Group Details

Group Name
ffdhe6144
Group Code (Decimal)
259
Group Code (Hex)
0x0103
Type
FFDHE
Security Level
~176 bits

What is ffdhe6144?

FFDHE6144 is a 6144-bit finite field DH group providing approximately 176-bit security. This group offers exceptional security margins suitable for ultra-long-term secret protection (100+ years). FFDHE6144 is defined in RFC 7919 but is rarely implemented due to extreme performance costs. The computational overhead is prohibitive for most applications (100-200x slower than X25519). FFDHE6144 is supported by some TLS libraries but not commonly by browsers. Its use is limited to specialized government/military scenarios where performance is irrelevant and maximum security is paramount.

Role in JA3 Fingerprinting

The ffdhe6144 group is used for ECDHE key exchange in TLS, providing perfect forward secrecy. Different browsers and HTTP clients advertise different supported groups, making this a key component of JA3 fingerprints.

Fingerprinting Impact: The order and selection of supported groups reveals browser type, version, and security preferences.

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Technical References