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secp192r1

ECDHE | Security: 96 bits (DEPRECATED) | Code: 19

Group Details

Group Name
secp192r1
Group Code (Decimal)
19
Group Code (Hex)
0x0013
Type
ECDHE
Security Level
96 bits (DEPRECATED)

What is secp192r1?

secp192r1 (also known as P-192 or prime192v1) is a legacy NIST curve providing 96-bit security. It was standardized in FIPS 186 and ANSI X9.62 but is now considered weak for modern applications. The 96-bit security level is vulnerable to well-funded adversaries and advancing computational power. Most browsers and TLS libraries have deprecated secp192r1 in favor of stronger curves like secp256r1 or X25519. secp192r1 should not be used for new deployments and exists primarily for backward compatibility with very old systems. Security experts recommend migrating away from this curve immediately.

Role in JA3 Fingerprinting

The secp192r1 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