(TECT-541) Due to vulnerabilities discovered in the SHA-1 hashing algorithm, SHA1 algorithms for signatures and key exchange have been removed from client defaults. Please see the Tectia Client example file ssh-broker-config-example.xml Note when upgrading from 6.5.1 with changed configurations or from 6.4.x, the Post- Quantum Cryptography (PQC) algorithms require a Tectia Quantum-Safe Edition license and are not enabled unless explicitly configured. Note that the server-side, Tectia Server version 6.6 and above, Tectia SSH Server for z/OS version 6.6.12 or above, or OpenSSH version 9.0 or above, needs to also support and allow at least one of the PQC hybrid KEX algorithms or connections will use classical KEX algorithms by default. The hybrid approach mitigates the risk of future attacks on recorded secure shell sessions if weaknesses are discovered in either algorithm. Both the PQC and ECDH algorithms contribute to the key material resulting in a session key that is at least as hard to break as the strongest composite. (TECT-193) Tectia Quantum-Safe Edition license file enables Post Quantum Cryptography (PQC) algorithms SABER, CHRYSTALS/Kyber, FrodoKEM, and Streamlined NTRU Prime that are used in a Hybrid Key Exchange together with a classical ECDH algorithm. We recommend uninstalling any SSH Secure Shell and SSH Tectia 4.x products, and on Windows also SSH Tectia 6.0.x or older, before installing SSH Tectia 6.6 products.įor the installation instructions, refer to the Tectia Client User Manual.

Tectia Quantum-Safe Edition with multiple PQC hybrid key exchange algorithms.The 6.6.0 release is available for Linux, AIX, and Windows on x86-64 platforms. Items addressed in this release are listed under the '6.6.0' section. This release is based on Tectia Server 6.5.2. The latest support end dates for Tectia Client/Server are available at: The 6.6 release of Tectia Client is declared a Feature Release, and it is supported for 3 years from the release date of 6.6.0.

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