Update README.md

Author: Lotte Felius

README.md

@@ -7,6 +7,7 @@ This repository is based on https://github.com/duckdb/extension-template, check
 VCrypt, short for _Vectorized Cryptography_, allows to efficiently encrypt and decrypt values within DuckDB. It is leveraging DuckDB compression methods to compress away metadata such as nonces, which are used to randomize the encryption. Because of its design, VCrypt often uses _vectorized processing_ to encrypt and decrypt values in batch.
 
 NB: this extension is highly experimental and might not work correctly yet.
+For more information about the internals, you can read the corresponding [paper](https://openproceedings.org/2025/conf/edbt/paper-347.pdf). 
 
 ## Usage