FIX over TLS (FIXS)

FIX-over-TLS (FIXS) is the standard to secure FIX sessions using the Transport Layer Security (TLS) protocol. The use of FIXS is considered a requirement as it introduces a basic level of security and standard options for interoperability.

Version 1.1 Release Candidate 1

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FIXS - Technical Specification v1.1 RC1 455.82 KB 717 downloads

FIXS Version 1.1 Release Candidate 1 – Technical Specification published February...
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FIXS - Technical Proposal - v1.1 RC1 392.92 KB 722 downloads

Technical Proposal FIXS Version 1.1 Release Candidate 1– published February 22nd,...

    Version 1.0 Standard

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    FIXS Technical Specification – Technical Standard 668.95 KB 830 downloads

    2/19/2021 - FINAL Standard FIX-over-TLS (FIXS) v1.0 ...

      Version 1.0 Draft Standard

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      FIXS Technical Specification - v1.0 Draft Standard 200.84 KB 2520 downloads

      1/5/2018 -  Draft Standard v1.0 ...

        Version 1.0 Release Candidate 1

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        FIXS Technical Standard - v1.0 RC1 252.09 KB 1438 downloads

        FIX-over-TLS (FIXS) Technical Standard - FIXS is the standard to secure the Transport...

          FIXS Stunnel User Guide for FIX Applications

          Please click here to view the technical guidelines for FIXS Stunnel.  The Stunnel guide is intended to allow anyone to get started with FIXS, whilst the FIXS specification is applicable to all TLS implementations.