John Althouse

Founder and CTO at FoxIO

Inventor of JA4+: https://github.com/FoxIO-LLC/ja4
Co-inventor of JA3: https://github.com/salesforce/ja3
Inventor of JA3S: https://engineering.salesforce.com/tls-fingerprinting-with-ja3-and-ja3s-247362855967
Co-inventor of HASSH: https://github.com/salesforce/hassh
Co-inventor of CYU: https://engineering.salesforce.com/gquic-protocol-analysis-and-fingerprinting-in-zeek-a4178855d75f
Co-inventor of JARM: https://engineering.salesforce.com/easily-identify-malicious-servers-on-the-internet-with-jarm-e095edac525a

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John Althouse

Run by threat analysts for threat analysts

Run by threat analysts
for threat analysts