Fravia is a pseudonym/handle for a European
cracker (his real name, according to his autobiography, is Fjalar Ravia) who is probably best known for his
web archive of
reverse engineering techniques and papers. Mirrors of the old web site (fravia.org) still exist (see, e.g.,
Internet Archive), though Fravia has publicly requested their removal in favor of his new web-searching-centric sites.
See more at Wikipedia.org...