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How to securely store signature file

Çağlar Arlı      -    14 Views

How to securely store signature file

I am using TPM to to encrypt and sign my data. But since I am not security expert, I need to come to you guys :D

I am developing this app to verify file content. I already has this part sorted out with TPM. But now comes the tricky part. I have multiple people using this pc but only I have root access. How to store signature in file that only my app/me can access it? The file has to be on same pc as my app, this is pure offline.

So is there any better/cleaner solution than just altering rights to folder/file with chmod command? I don't know the best practices with storing signature files.