So you want to deploy FN-DSA
FN-DSA is a proposed post-quantum signature standard that has generated mixed reactions among engineers. While cryptography engineers express significant concerns about its implementation, protocol engineers see potential benefits, particularly in reducing packet fragmentation. The standard is still in draft form, with its finalization expected to take at least a year, and there are ongoing debates about the necessity of prehashing in its application.
- ▪FN-DSA is currently a proposed standard and not yet finalized.
- ▪The initial public draft has been stuck in the publishing pipeline since August 2025.
- ▪There are differing opinions in the cryptographic community regarding the importance of prehashing.
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| Original publisher | Key Material |
| Canonical URL | https://keymaterial.net/2026/05/13/so-you-want-to-deploy-fn-dsa/ |
| Publication time | Sun, 17 May 2026 22:18:06 +0000 |
| Retrieval time | 2026-05-17T22:33:21.086Z |
| Last seen | 2026-05-17T22:33:21.086Z |
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Opening excerpt (first ~120 words) tap to expand
Categories Cryptography So you want to deploy FN-DSA Post author By Sophie Schmieg Post date May 13, 2026 No Comments on So you want to deploy FN-DSA FN-DSA (née Falcon) is a proposed post-quantum signature standard that keeps polarizing engineers. Cryptography engineers on the one hand, tasked with potentially implementing this monstrosity, hate it with a passion. Protocol engineers on the other hand, especially when working with UDP, see a glimmer of hope that they might not have to deal with packet fragmentation and really would like to use it. For the most part, I agree with my fellow cryptography engineers that the best approach to using FN-DSA is to not.
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