# OpenSSH 10.6 enables a post-quantum signature algorithm, so experimental keys need replacing

DevFeed: [OpenSSH 10.6 enables a post-quantum signature algorithm, so experimental keys need replacing](<https://devfeed.tech/articles/openssh-10-6-enables-a-post-quantum-signature-algorithm-so-experimental-keys-need-replacing-66416.md>)

Original publisher: [Read original article](<https://www.helpnetsecurity.com/2026/10/07/openssh-10-6-released/>)

Author: Sinisa Markovic

Published: 2026-10-07T05:12:21Z

Content type: news

Language: en

Sources: [Help Net Security](<https://devfeed.tech/sources/help-net-security.md>)

Topics: [OpenSSH](<https://devfeed.tech/topics/openssh.md>), [Encryption](<https://devfeed.tech/topics/encryption.md>), [Post-quantum cryptography](<https://devfeed.tech/topics/post-quantum-cryptography.md>), [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>)

Tags: [encryption](<https://devfeed.tech/tags/encryption.md>), [models](<https://devfeed.tech/tags/models.md>), [news](<https://devfeed.tech/tags/news.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [openssh](<https://devfeed.tech/tags/openssh.md>), [post-quantum](<https://devfeed.tech/tags/post-quantum.md>), [quantum](<https://devfeed.tech/tags/quantum.md>), [security](<https://devfeed.tech/tags/security.md>), [software](<https://devfeed.tech/tags/software.md>)

## AI overview

OpenSSH 10.6 introduces the hybrid post-quantum signature algorithm ssh-mldsa44-ed25519, requiring earlier experimental keys to be regenerated or removed. The release also changes compression behavior, tightens username and path handling, and includes authentication and certificate fixes. The maintainers say releases will come more frequently for now amid numerous security reports.

## Source excerpt

The OpenSSH team released version 10.6 on Oct. 6 and said it will ship releases more often for now to get bugfixes into users' hands more quickly. The maintainers have received a large number of security reports, many found by AI models or with AI help, and in a number of cases a different researcher independently found the same bug later. Adversaries who do not report bugs to open-source projects, the maintainers wrote, "are likely ... More -> The post OpenSSH 10.6 enables a post-quantum signature algorithm, so experimental keys need replacing appeared first on Help Net Security.