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SSH Tectia

Different Protocol Versions

There are two versions of the Secure Shell protocol. The current version, Secure Shell version 2 (SecSh v2, SSH2) provides several security improvements as compared to the original Secure Shell version 1 (SecSh v1, SSH1). SSH Tectia is based on SecSh v2, as SSH Communications Security considers SecSh v1 deprecated and does not recommend nor support its use anymore.

SSH G3, based on and compatible with the standard SSH2, considerably improves Secure Shell encryption and management performance, securing throughput-intensive file transfers and applications without causing processing bottlenecks. The SSH G3 architecture is incorporated in the SSH Tectia client/server solution version 5.0 and later.

More information on the protocol can be found in the Secure Shell RFCs (4250-4256) (


Highlights from the SSH.COM blog:

  • Cryptomining with the SSH protocol: what big enterprises need to know about it

    Cryptomining malware is primarily thought of as targeting desktops and laptops and is used to hijack system resources to mine cryptocurrency.
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  • SLAM the door shut on traditional privileged access management

    Did you know that something as trivial-sounding as granting access for your developers or third parties to a product development environment can throw a gorilla-sized monkey wrench into your operations and productivity?
    Read more
  • We broke the IT security perimeter

    Everyone understands the concept of a security perimeter. You only gain access if you are identified and authorized to do so.
    Read more