unrecognised fingerprint
t13d0311a3_55b375c5d22e_14aed462abe7
One JA3 across every connection — a deterministic stack, the shape of a library or command-line client, with no catalogue name yet.
- JA4
- JA4_r
- JA3
- JA3_raw
Read
Spread measures reach, not intent: it can’t tell one scraper visiting 500 domains from 500 people visiting one each. Stability is a claim about software — whether the stack is deterministic — nothing about who runs it.
Footprint
ClientHello anatomy
The underscore groups of JA4_r are the raw cipher suites · extensions · signature algorithms behind the hash.
The post-quantum key share is a structural fact about the hello, not a verdict — GREASE values are flagged the same neutral way.
- 00x1301TLS_AES_128_GCM_SHA256
- 10x1302TLS_AES_256_GCM_SHA384
- 20x1303TLS_CHACHA20_POLY1305_SHA256
- 00x0000server_name (SNI)
- 10x0005status_request (OCSP)
- 20x000asupported_groups
- 30x000dsignature_algorithms
- 40x0010application_layer_protocol_negotiation (ALPN)
- 50x0012signed_certificate_timestamp
- 60x0015padding
- 70x001bcompress_certificate
- 80x002bsupported_versions
- 90x002dpsk_key_exchange_modes
- 100x0033key_share
Stored sorted — under one JA4 the wire order varies by construction, so no single order is “the” order.
- 00x001dx25519
- 10x0017secp256r1 (P-256)
- 20x0018secp384r1 (P-384)
- 30x0019secp521r1 (P-521)
- 00x0403ecdsa_secp256r1_sha256
- 10x0804rsa_pss_rsae_sha256
- 20x0401rsa_pkcs1_sha256
- 30x0503ecdsa_secp384r1_sha384
- 40x0203ecdsa_sha1
- 50x0805rsa_pss_rsae_sha384
- 60x0805rsa_pss_rsae_sha384
- 70x0501rsa_pkcs1_sha384
- 80x0806rsa_pss_rsae_sha512
- 90x0601rsa_pkcs1_sha512
- 100x0201rsa_pkcs1_sha1
Reach — domains contacted
- 94%
- 5.9%
Top 2 of 2. Share is the fraction of this fingerprint’s observations reaching each name.