RFCs have two authors

sigproc.bib

@@ -260,29 +260,28 @@ machine learning algorithms},
 }
 
 @misc{rfc4254,
-    author = {Ylonen, T.},
+    author = {Ylonen, T. and Lonvick, C.},
     month = jan,
     title = {The Secure Shell ({SSH}) Connection Protocol. {RFC} 4254, IETF, Network Working Group},
     year = {2006}
 }
 
 @misc{rfc4252,
-    author = {Ylonen, T.},
+    author = {Ylonen, T. and Lonvick, C.},
     month = jan,
     title = {The Secure Shell ({SSH}) Authentication Protocol. {RFC} 4252, IETF, Network Working Group},
     year = {2006}
 }
 
 @misc{rfc4253,
-    author = {Ylonen, T.},
+    author = {Ylonen, T. and Lonvick, C.},
     month = jan,
     title = {The Secure Shell ({SSH}) Transport Layer Protocol. {RFC} 4253, IETF, Network Working Group},
     year = {2006}
 }
 
 @misc{rfc4251,
-    author = {Ylonen, T.},
-    editor = {Lonvick, C.},
+    author = {Ylonen, T. and Lonvick, C.},
     month = jan,
     title = {The Secure Shell ({SSH}) Protocol Architecture. {RFC} 4251, IETF, Network Working Group},
     year = {2006}