Using your digital signature in Mozilla Thunderbird for Windows

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Before you proceed you must do

  • IMPORTANT : In the information message "Please enter the master password for InfoNotary", enter your PIN code.
  • IMPORTANT : Firefox and Thunderbird use direct access to the smart card. When you have successfully installed your certificates, you SHOULD NOT delete them from there, as this will also delete the certificate, along with the private and public keys on the smart card. After that, the certificate cannot be restored and a new one must be issued.
  • IMPORTANT : In order to use your certificate with Firefox and Thunderbird, the reader must be on your computer before opening the program.

Install Infonotary certificate chain

Before you can start using the certificate, you must install the Infonotary certificate chain.

Certificate chain for certificates, issued before 08.01.2018 - INotaryCertChain.p12.

Certificate chain for certificates, issued after 08.01.2018 - InfoNotary_Qualified_eIDAS.p12


Start Mozilla Thunderbird. From the menu, select Options.

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From Privacy & Security select Manage Certificates.

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Choose the tab Your certificates and click on Import.

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From the window that appears, select the pre-downloaded certification chain.

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Leave the field blank and click OK.

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Newly installed certificates can be found in section Authorities.

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In Mozilla for every certificate of a Certification Authority (CA) the user must choose a level of trust. This is done by selecting the certificate and clicking on Edit Trust. The easiest way to do this setting for the certificate "InfoNotary CSP Root" and/or "InfoNotary TSP Root" select two possible options. This will make all the InfoNotary trusted certificates for all operations.

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Install software security module

Start Mozilla Thunderbird. From the menu, select Options.

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From Privacy & Security, choose Security Devices.

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To add a new device, choose Load.

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Change the name of the module (Module Name), as desired.

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Select PKCS # 11 library corresponding to your smart card.

  • Siemens - C:\WINDOWS\system32\siecap11.dll
  • Charismathics - C:\WINDOWS\system32\cmP11.dll
  • Bit4id - C:\WINDOWS\system32\bit4ipki.dll

In case you use 64 bits version of Firefox or Thunderbird and Charismathics smart card, path to library is C:\WINDOWS\system32\cmP1164.dll.

After you click OK, your smart card will appear in the list of available devices.

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Configuring use profile in Thunderbird

In order for you to sign your outgoing mails, you have to associate your account with your digital signature on your smart card. To do this follow the steps below:

From the menu, select Account Settings.

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Press the Select button on "Personal certificate for digital signing" and "Personal certificate for encryption"

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A window will appear where you can specify your certificate.

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Choose the appropriate certificate from the smart card and confirm by clicking OK.


Thunderbird will offer you to choose the same certificate for decrypting messages send to you.

Взето от „http://wiki.infonotary.com/index.php?title=Using_your_digital_signature_in_Mozilla_Thunderbird_for_Windows&oldid=2059“.