migrate-nomatch-alglen: switched to RSASHA256 instead of RSASHA1 and the key size now changes from 2048 bits to 3072 bits instead of 1024 bits to 2048 bits. migrate-nomatch-algnum: switched to RSASHA256 instead of RSASHA1 as initial algorithm and adjusted mininum key size to 2048 bits. rsasha256: adjusted minimum key size to 2048 bits.