Hiii all i am learning windows device driver development and i have developed windows device driver for windows 10 64 bit and windows 7 64 bit version and the driver is working properly for windows 10 and it is not working for windows 7 64 bit. for windows 7 driver is installed successfully and it is showing “Driver is working Properly” but when i opened driver details it is showing “Digital signer: Not Digitally signed” how to solve this problem but i changed what are the configure required for windows 7 64 bit in visual studio 2109 and i am attaching the image please check it and tell me the solution or tell me how to reconfigure the driver for different windows OS in visual studio 2019
To be clear, a certificate that had a private key only 256 bits in length would be a joke from a security point of view. 4096 or 8192 bit keys should generally be used and longer ones are possible too. What he means is a certificate that uses SHA 256 versus SHA1 as a hash algorithm. The RTM version of windows 7 did not include support for such certificates (remember it was release in ~2009) but later windows updates provided support. The usual solution is to cross sign. That’s a process whereby you sign the same binary more than once with different certificates. An older less secure one for compatibility, and a newer more secure one to support newer OSes. IIRC there was extensive documentation on how to do this at the time, and MSFT even upgraded signtool expressly to allow this
