http://msmvps.com/blogs/montaque/archive/2004/04/03/4590.aspxAim: I wanna guarantee that only signed assembly have the access to my class library. SO I make use of the .net StrongNameIdentityPermissionAttribute to protect my assembly. When testing ,I encounter the different public keys of a same public/privateenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/montaque/archive/2004/04/03/4590.aspx#42766Sat, 16 Apr 2005 07:38:00 GMTd67277c4-116b-43f1-b688-e9ef184ea916:42766TrackBack^_~<div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=42766" width="1" height="1">http://msmvps.com/blogs/montaque/archive/2004/04/03/4590.aspx#4592Sat, 03 Apr 2004 11:17:00 GMTd67277c4-116b-43f1-b688-e9ef184ea916:4592Montaquereawaylee is right,thanks u :)<div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=4592" width="1" height="1">http://msmvps.com/blogs/montaque/archive/2004/04/03/4590.aspx#4591Sat, 03 Apr 2004 11:09:00 GMTd67277c4-116b-43f1-b688-e9ef184ea916:4591MontaqueIt is the wrong way to extract public key from the key file. <br> <br>You should first extract public key from the key pair file to the public key file: <br>sn -p montaque.snk montaquepublic.snk <br> <br>then use the following command to see the public key: <br>sn -tp montaquepublic.snk <br> <br>And you will see the correct public key.<div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=4591" width="1" height="1">