I am in the process of created a signing certificate and i have an option of RSA-4096 or RSA-3072. Is there much difference in security between the two? I know people say RSA-3072 should be good until 2030. But people may also prefer the high security. But if it makes a big difference on speed, they may not. So do you think it is worth using RSA-4096 for the next 10 years?