B A = BA

[One Jsim]

I have been creating key-pars for me and helping other people. Since I
am not a cryptographer I use always GPG defaults options and
suggestions (line command)

Alfter all this new stuff  (creating sha-1 collisions, md-5 ? or so)
should I change the procedures I used to use?

Should I revoke (and help others to revoke) their keys - some keys
have yet 5 years or so "to live"?

For a new key, continue to use default options?

Thanks

José Simões