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Koen225142565mmt
Participant
January 5, 2022
Answered

Niet)ondersteund algoritme - Unsupported algoritme

  • January 5, 2022
  • 3 replies
  • 3739 views

I have a new (Belgian) eID. But the certificates were not longer recognised. So I re-Installed Adobe Acrobat Reader DC. The certificate for signature is now accepted and tested (5 green check marks). But at the end of the process to sign a .pdf document the error appears: (dutch:) “Fout aangetroffen tijdens ondertekenen: Niet-ondersteund algoritme” (free translated:)”Error encountered while signing: Unsupported algorithm”. What can I do? Please answer.

    Correct answer Koen225142565mmt

    The problem is solved. Solution : configure Acrobat Reader without pkcs#11 module.
    If this module has already been linked, the already linked module must therefore be uncoupled again.
    After unlinking, restart Acrobat Reader and try signing again.
    BELGIUM uses software called eID middleware that communicates with the card for Windows. In the past Acrobat Reader could not use this middleware and Acrobat Reader needed the pkcs11 module to do the communication with the card. Recently, ADOBE has made the necessary changes so that READER can work with the middleware.
    The pkcs11 module has now basically become optional within Acrobat Reader.

    3 replies

    K
    Koen225142565mmtAuthorCorrect answer
    Participant
    February 1, 2022

    The problem is solved. Solution : configure Acrobat Reader without pkcs#11 module.
    If this module has already been linked, the already linked module must therefore be uncoupled again.
    After unlinking, restart Acrobat Reader and try signing again.
    BELGIUM uses software called eID middleware that communicates with the card for Windows. In the past Acrobat Reader could not use this middleware and Acrobat Reader needed the pkcs11 module to do the communication with the card. Recently, ADOBE has made the necessary changes so that READER can work with the middleware.
    The pkcs11 module has now basically become optional within Acrobat Reader.

      C
      chantala61760780
      Participant
      June 26, 2025

      Thanks, this helped me also, on Belgium eid-website it's mention to couple the pkcs module

      try67
      Community Expert
      try67Community Expert
      Community Expert
      January 24, 2022

      Contact the authority that issued this signature profile and ask for exact instructions on how to use it.

      It's also recommended to go to the application's Preferences (via the Edit menu on Windows or the Reader app menu on a Mac), then to Trust Manager and click both Update Now buttons there.

      S
      Senne22794518b6zp
      Participant
      January 23, 2022

      I'm having the same issue, Did you find a solution yet?

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