Anonymize a pdf

Dear list,

Some conferences want anonymous paper.

Using LaTeX hyperref package it is easy to remove some metadata, like:
Title, Subject, Author... but in the .pdf stays an annoying metadata
called "PTEX.Fullbanner." Besides the fonts names are still visible.

So my question is, using gs it is possible to print a .pdf into
another .pdf so that:
- all not strictly necessary metadata is removed
- the fonts names are replaces with gibberish

About the last point, all the fonts are embedded subfonts, so the name
is not important.


Your faithfully,
Paolo