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vanitygen64.exe -k -o direcciones.txt 1

vanitygen64.exe -e -k -o direcciones.txt 1
> Enter new password:

openssl aes-256-cbc -in privada.txt -out privencriptada.txt

#!/bin/bash
echo Cuantas clavs hay que generar
read clav
conta=0
while [  $conta -lt $clav ]; do
         od -An -N32 -xw /dev/random |tr -d ' '
         let conta=conta+1
done

use warnings;
use strict;
use Fcntl;

my $num_keys = 50e3;

sub gen_privkey {
    my ($fd) = @_;

    my $read = sysread $fd, my $buf, 256/8 or die "sysread: $!";
    die 'EOF' unless $read;
    return unpack 'H*', $buf;
}

sysopen my $fd, '/dev/urandom', O_RDONLY;
printf "%s\n", gen_privkey $fd for 1 .. $num_keys;
close $fd;

use warnings;
use strict;
use Fcntl;
use Time::HiRes qw/time/;
use Parallel::ForkManager;

my $runtime = 5;  ## desired runtime, in seconds
my $nprocs = 0;

sub gen_pks {
    my ($npks) = @_;
    my @pks;
    
    sysopen my $fd, '/dev/urandom', O_RDONLY;
    for (1..$npks) {
        my $read = sysread $fd, my $buf, 256/8 or die "sysread: $!";
        die 'EOF' unless $read;
        warn 'short read' if 256/8 != length $buf;
        push @pks, $buf
    }
    close $fd;

    return \@pks;
}

sub ncpus {
    open my $fd, '<', '/proc/cpuinfo' or die "open: $!";
    my $ncpus = grep { /^processor/ } <$fd>;
    close $fd;
    return $ncpus;
}

my $t0 = time;
my $pm = Parallel::ForkManager->new ($nprocs or ncpus);
$pm->set_waitpid_blocking_sleep (0);
$pm->run_on_finish (sub {
    my $data = pop;
    printf "%s\n", unpack 'H*', $_ for @$data;
});

while (1) {
    last if time-$t0 > $runtime;
    $pm->start and next;
    $pm->finish (0, gen_pks 1e3);
}
$pm->wait_all_children;

perl programa.pl >claves.txt

    sysopen my $fd, '/dev/urandom', O_RDONLY or die "sysopen: $!";

Q: Can I search by private key?
A: Yes. @see API documentation.