十大免费时间戳服务器地址
http://sha256timestamp.ws.symantec.com/sha256/
http://timestamp.comodoca.com/rfc3161
http://tsa.wosign.com/timestamp
http://tsa.starfieldtech.com
http://timestamp.globalsign.com/scripts/timstamp.dll
http://rfc3161timestamp.globalsign.com/advanced
http://timestamp.digicert.com
http://time.certum.pl
http://timestamp.verisign.com/scripts/timestamp.dll
http://timestamp.entrust.net/TSS/AuthenticodeTS
