Automatic update and no longer can sign documents

Report · May 20, 2016

I had an automatic update on my windows system which included the Acrobat DC. Previous to the update, I was able to use the digital signature program through Acrobat DC and had no issues. Now when I try to digitally sign a document using Adobe DC, I receive the following error:

“Key does not exists” and “Error Code 2148073485”.

I need assistance. I have uninstalled and reinstalled the certificates……..still does not work. Do I need to uninstall Acrobat DC and reinstall? I am at my wits end.

Report · May 22, 2016

We published a KB article related to this issue just a while back.

Windows cryptographic service provider error | Key does not exist, error code 2148073485

While we investigate it further, the workaround provided in the article should help.

"Check with your signature device or driver manufacturer for an updated driver that may resolve this error.

If the requested hashing algorithm is not supported by the signature device, then the solution is to set registry key aSignHash to SHA1 as described on this page -http://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Windows/Security.html#Signing:Ha shAlgorit.... However, this is not a recommended approach as this would set SHA1 as the default hashing algorithm for all signatures, which is considered deprecated industry wide. Therefore, Adobe strongly recommends checking with your signature device or driver manufacturer to get a newer device or driver that supports SHA256 or higher hashes."