Article PS070215160 ASN1 bad tag value met error Problem Description On Windows 2003/IIS 6, the last line of the code snippet Set Blob = CM.CreateBlob Blob.Binary = Request.ClientCertificate("Certificate") Set Cert = CM.ImportCertFromBlob(Blob) generates the following error: Persits.CryptoManager.1 error '800a0025' ASN1 bad tag value met. Solution Starting with IIS 6.0 on Windows 2003, Microsoft changed the format of data returned by Request.ClientCertificate("Certificate") which caused a problem with AspEncrypt's CryptoBlob object originally designed for Windows NT and Windows 2000. To fix the aforementioned error, simply replace the line ... Blob.Binary = Request.ClientCertificate("Certificate") ... with ... Temp = Request.ClientCertificate("Certificate") Blob.Binary = Temp ... Created: 2/15/2007 2:45:54 PM Last Modified: 2/15/2007 4:17:11 PM Copyright © Persits Software, Inc. 1998 - 2019 For technical support, write to support@persits.com.