PDF signing fails with 'Key does not exist' (Error 2148073485)

Symptoms

When signing a PDF with your CAC, Adobe Reader DC throws: 'The Windows Cryptographic Service Provider reported an error: Key does not exist. Error Code: 2148073485'.

Likely cause

Bug in some builds of Adobe Reader DC that breaks compatibility with CAC private keys held by the Microsoft Smart Card CSP.

Fix

1. Open any PDF, click Help > Check for Updates and install the latest Reader DC update. 2. If still failing, fully uninstall Adobe Reader DC. 3. Restart the computer. 4. Download Adobe Reader XI (11.x) from get.adobe.com/reader/otherversions/ and install it. 5. Re-attempt the signature.

Sourced from militarycac.com. Rewritten for clarity.

Didn't work, or need it tailored to your setup?

Ask the AI assistant