grep '^processor' /proc/cpuinfo \
| (
    while read DUMMY; do
      od -t x1 -A n -N 32 /dev/random  \
      | tr -d '[[:space:]]' \
      | gpg -c -z0 --passphrase-fd=0 --disable-mdc \
          --cipher-algo=TWOFISH -o - /dev/zero &
    done
    wait
  ) \
| pv >/dev/null