This article is from the alt.security.keydist FAQ, by Michael Bauser email@example.com with numerous contributions by others.
If you mean "Should I post my key to other alt.security.* or
comp.security.* newsgroups?", the answer is a definite "No". Those groups
are discussion and/or announcement groups, and public keys don't count,
unless they're very important keys (such as keys belonging to a timestamp
server or certficate authority).
There are, however, at least 9 other key-distribution newsgroups located in
smaller news hierarchies. You might want to crosspost your public keys to
one of these newsgroups, or monitor them for new keys:
The newsgroup demon.security.keys is part of the internal hierarchy for
Demon Internet (an internet service provider in the United Kingdom), but
has much wider distribution. Recommended for PKE-users in the UK.
The newsgroup fidonet.pkey_drop is a (defunct?) gated version of the
Fidonet backbone echo PKEY_DROP. You cannot post to it from the netnews
The newsgroups t-netz.pgp.schluessel, z-netz.alt.pgp.schluessel,
domino.pgp.schluessel, and waros.pgp.schluessel are for distributing PGP
keys only, and are part of German-language news hierarchies ("schluessel"
I have no information about the newsgroups city-net.diverses.pgp-keys,
hothouse.lokal.pgp-keys, and real-net.computer.pgp.public_key, beyond
what's revealed in the newsgroup names. They are probably all ISP-local