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Acrobat for Windows and Mac: Security & Digital signatures

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Support of generating digital using pkcs11 CKK_EC key type

2 votes

Anonymous shared this idea · Apr 27, 2020 · Report… · Admin →

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Patrik Sadaic commented · March 27, 2026 6:24 AM · Report

I can confirm the same issue. After extended PKCS#11 library debugging we’ve come to a conclusion that as soon as key has type CKK_EC (or deprecated CKK_ECDSA) Adobe fails with “Unsupported Algorithm”.

So from my understanding it is not even an algorithm issue but Adobe does not support CKK_EC key type at all while using PKCS#11 libraries.

There is no way to resolve this, it is an unsupported key type which Adobe should implement.

This is a critical issue for PKCS#11 users. It is unbelievable noone cares about this.

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