How can I open text files which seem to be PKCS #7 Certificates. These were archived onto floppy discs in the late 90s and have now been burned onto a CD. I am using windows 7 on my computer
                
                A: 
                
                
              
            OpenSSL and its pkcs7 command may help you to decode your documents. Adapt the parameters to your own needs.
openssl pkcs7 -in myfile.pem -print_certs -text
                  Jcs
                   2010-09-26 10:33:35