adding discop paper

references.bib

@@ -297,6 +297,15 @@ @inproceedings{Wails2024a
 	discussion_url = {https://github.com/net4people/bbs/issues/312},
 }
 
+@inproceedings{Ding2023a,
+	author = {Jinyang Ding and Kejiang Chen and Yaofei Wang and Na Zhao and Weiming Zhang and Nenghai Yu},
+	title = {{Discop}: Provably secure steganography in practice based on ``distribution copies''},
+	booktitle = {Symposium on Security \& Privacy},
+	publisher = {IEEE},
+	year = {2023},
+	url = {https://dingjinyang.github.io/uploads/Discop_sp23_paper.pdf},
+}
+
 @inproceedings{Niere2023a,
 	author = {Niklas Niere and Sven Hebrok and Juraj Somorovsky and Robert Merget},
 	title = {Poster: Circumventing the {GFW} with {TLS} Record Fragmentation},