diff --git a/README.md b/README.md
index 413755cf..bf546370 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,9 @@
# 
-
-
-
-
-[](https://coveralls.io/github/google/OpenSK?branch=stable)
-
-*News:*
-
-- 2023-08-24: [PQC paper reference](#Research)
+This branch is unmaintained. It implements the FIDO 2.0 version of OpenSK.
+Please check out the latest versioned branch for maintained code.
+If you are a developer, go to the
+[develop branch](https://github.com/google/OpenSK/tree/develop).
## OpenSK
@@ -24,16 +19,11 @@ You can see OpenSK in action in this
### FIDO2
-The stable branch implements the
+This branch implements the
[CTAP2.0 specification](https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html)
and is FIDO certified. OpenSK supports U2F, and non-discoverable credentials
created with either protocol are compatible with the other.
-If you want to use features of the newer FIDO 2.1, you can try our
-[develop branch](https://github.com/google/OpenSK/tree/develop). This version is
-NOT certified and less thoroughly tested though. If you plan to add features to
-OpenSK, you should switch to develop.
-
### :warning: Disclaimer
This project is **proof-of-concept and a research platform**. It is **NOT**
@@ -76,28 +66,6 @@ Please check our [Troubleshooting and Debugging](docs/debugging.md) section if y
have problems with the installation process or during development. To find out what
else you can do with your OpenSK, see [Customization](docs/customization.md).
-## Research
-
-We implemented post-quantum cryptography on OpenSK. The code is released under
-the [hybrid-pqc tag](https://github.com/google/OpenSK/releases/tag/hybrid-pqc).
-Our [paper](https://eprint.iacr.org/2022/1225) was published in the ACNS
-Secure Cryptographic Implementation workshop 2023 and won the best paper award.
-
-
-Bibtex reference
-
-```
-@InProceedings{Ghinea2023hybrid,
- author= {Diana Ghinea and Fabian Kaczmarczyck and Jennifer Pullman and Julien Cretin and Rafael Misoczki and Stefan Kölbl and Luca Invernizzi and Elie Bursztein and Jean-Michel Picod},
- title= {{Hybrid Post-Quantum Signatures in Hardware Security Keys}},
- booktitle= {{4th ACNS Workshop on Secure Cryptographic Implementation, Kyoto, Japan}},
- month= {June},
- year= {2023},
-}
-```
-
-
-
## Contributing
See [Contributing.md](docs/contributing.md).