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JA3

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Free
2,992
01 May 2025
10 September 2025
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JA3 is a method for creating SSL/TLS client fingerprints that can be easily shared for threat intelligence. It was invented at Salesforce in 2017 but is now maintained by John Althouse at FoxIO-LLC. The project includes JA3 and JA3S scripts for Zeek and Python, with support added to various cybersecurity tools and platforms.

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