diff --git a/References/references.bib b/References/references.bib
index 6f83642..0e1da38 100644
--- a/References/references.bib
+++ b/References/references.bib
@@ -179,3 +179,14 @@ Section: Proceedings on Privacy Enhancing Technologies},
 	year = {1997},
 	file = {Snapshot:/home/jake/Zotero/storage/KUTP7P8A/rfc2104.html:text/html},
 }
+
+@misc{tsou_ipsec_2012,
+	title = {{IPsec} {Anti}-{Replay} {Algorithm} without {Bit} {Shifting}},
+	url = {https://tools.ietf.org/html/rfc6479},
+	language = {en},
+	urldate = {2021-01-01},
+	author = {Tsou, Tina and Zhang, Xiangyang},
+	month = jan,
+	year = {2012},
+	file = {Snapshot:/home/jake/Zotero/storage/WCGNATZP/rfc6479.html:text/html},
+}