Why do I get an error when I try to sign an assembly?

Question

C++ / C#

Hello, I wrote a program in c # in visual studio 2013.
Having received a certificate, I specify it in the project properties, the studio prompts me to enter a password, after entering the password, it gives me an error:

How can I solve this problem?
Thank you very much in advance!

Answer 1

When creating a PKCS#12 container (aka PFX), specify the setting that the key can only be used to create an electronic signature. For example. for openssl pkcs12 this is the -keysig option. What utility did you use to create the key? sn ?