When writing a Windows Communication Foundation (WCF) application that uses an X.509 certificate for authentication, it is often necessary to specify claims found in the certificate. For example, you must supply a thumbprint claim when using the FindByThumbprint enumeration in the SetCertificate method. Finding the claim value requires two steps. First, open the Microsoft Management Console (MMC) snap-in for certificates. (See How to: View Certificates with the MMC Snap-in.) Second, as described here, find an appropriate certificate and copy its thumbprint (or other claim values).
If you are using a certificate for service authentication, it is important to note the value of the Issued To column (the first column in the console). When using Secure Sockets Layer (SSL) as a transport security, one of the first checks done is to compare the base address Uniform Resource Identifier (URI) of a service to the Issued To value. The values must match or the authentication process is halted.
You can also use the PowerShell New-SelfSignedCertificate cmdlet to create temporary certificates for use only during development. By default, however, such a certificate is not issued by a certification authority and is unusable for production purposes. For more information, see How to: Create Temporary Certificates for Use During Development.
In the Console Root window's left pane, click Certificates (Local Computer).
Click the Personal folder to expand it.
Click the Certificates folder to expand it.
In the list of certificates, note the Intended Purposes heading. Find a certificate that lists Client Authentication as an intended purpose.
Double-click the certificate.
In the Certificate dialog box, click the Details tab.
Scroll through the list of fields and click Thumbprint.
Copy the hexadecimal characters from the box. If this thumbprint is used in code for the X509FindType, remove the spaces between the hexadecimal numbers. For example, the thumbprint "a9 09 50 2d d8 2a e4 14 33 e6 f8 38 86 b0 0d 42 77 a3 2a 7b" should be specified as "a909502dd82ae41433e6f83886b00d4277a32a7b" in code.
In the Certificate dialog box, click the Details tab. Scroll through the list of fields and click Thumbprint. Copy the hexadecimal characters from the box. If this thumbprint is used in code for the X509FindType , remove the spaces between the hexadecimal numbers.
Right-click on the certificate file and choose Find Certificates dialog. Use the dialog to locate the certificate file from your provider. When the Certificate dialog is displayed, Click the "Details" tab. Locate and select the Thumbprint field to display the thumbprint from your certificate.
At the left side of the browser's address bar, click on the lock symbol. In the pop-up dialog box, click Certificate. On the Certificate dialog box, click the Details tab. In the list box on the details page, scroll down until the word Thumbprint is visible in the list and then click Thumbprint.
Visit www.samltool.com/fingerprint.php and paste in your X.509 cert.Choose SHA1 and calculate, match the calcuated fingerpring with the AD thumbprint.Then recalculate in SHA256, this is your SHA256 thumbprint.
Find a certificate that lists Client Authentication as an intended purpose. Double-click the certificate.In the Certificate dialog box, click the Details tab.Scroll through the list of fields and click Thumbprint.
At a crime scene, forensic investigators find fingerprints by dusting surfaces with a dark powder that sticks to the prints. If they find any, they can lift the prints away using clear adhesive tape.
A certificate's fingerprint is the unique identifier of the certificate.Microsoft Internet Explorer calls it Thumbprint. Although not part of the certificate but rather computed from it, browsers tend to display it as if it were.
Every certificate has a thumbprint, it's the result of a mathematical algorithm – known as a hashing algorithm – that is run against the certificate's data. Because different certificates can share the same field data, the thumbprint is useful for uniquely identifying a certificate.
While the thumbprint itself contains no secret information itself, using the same thumbprint on multiple places reveals that you are using the same certificate on all these places.
All you have to do is wrap the command in parentheses, and then use dot-notation to access the Thumbprint property. Try this out: $Thumbprint = (Get-ChildItem -Path Cert:\LocalMachine\My | Where-Object {$_. Subject -match "XXXXXXX"}).
Certificate thumbprint is calculated over entire certificate, not just public key. When you renew the certificate, it is changed. At least, validity period will be different as the result, thumbprint on renewed certificate will be different as well.
At a crime scene, forensic investigators find fingerprints by dusting surfaces with a dark powder that sticks to the prints. If they find any, they can lift the prints away using clear adhesive tape.
No form of biometric authentication is entirely secure. If a hacker wants to steal your fingerprints, they have methods of getting them. As long as a hacker has direct access to your fingerprints (either in person or from a data breach) and the right tools, they can duplicate your prints.
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