03-07-2016
Open Flow Random Host Mutation in SDN
Hi Guys,
I have to demonstrate Moving target defense by employing Random host mutation in SDN. I can program in such a way to assign a new Virtual IP to the host every few seconds. However, my teacher is expecting to come up with some new solution based on something other than time.
Could you suggest what other factors could prompt a network administrator to assign a new Virtual IP to its hosts.
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LEARN ABOUT SUSE
crypt::openssl::random
Random(3) User Contributed Perl Documentation Random(3)
NAME
Crypt::OpenSSL::RSA - RSA encoding and decoding, using the openSSL libraries
Crypt::OpenSSL::Random - Routines for accessing the OpenSSL pseudo-random number generator
SYNOPSIS
use Crypt::OpenSSL::Random;
Crypt::OpenSSL::Random::random_seed($good_random_data);
Crypt::OpenSSL::Random::random_egd("/tmp/entropy");
Crypt::OpenSSL::Random::random_status() or
die "Unable to sufficiently seed the random number generator".
my $ten_good_random_bytes = Crypt::OpenSSL::Random::random_bytes(10);
my $ten_ok_random_bytes = Crypt::OpenSSL::Random::random_pseudo_bytes(10);
DESCRIPTION
Crypt::OpenSSL::Random provides the ability to seed and query the OpenSSL library's pseudo-random number generator
EXPORT
None by default.
Static Methods
random_bytes
This function, returns a specified number of cryptographically strong pseudo-random bytes from the PRNG. If the PRNG has not been
seeded with enough randomness to ensure an unpredictable byte sequence, then a false value is returned.
random_pseudo_bytes
This function, is similar to c<random_bytes>, but the resulting sequence of bytes are not necessarily unpredictable. They can be used
for non-cryptographic purposes and for certain purposes in cryptographic protocols, but usually not for key generation etc.
random_seed
This function seeds the PRNG with a supplied string of bytes. It returns true if the PRNG has sufficient seeding. Note: calling this
function with non-random bytes is of limited value at best!
random_egd
This function seeds the PRNG with data from the specified entropy gathering daemon. Returns the number of bytes read from the daemon
on succes, or -1 if not enough bytes were read, or if the connection to the daemon failed.
random_status
This function returns true if the PRNG has sufficient seeding.
BUGS
Because of the internal workings of OpenSSL's random library, the pseudo-random number generator (PRNG) accessed by Crypt::OpenSSL::Random
will be different than the one accessed by any other perl module. Hence, to use a module such as Crypt::OpenSSL::Random, you will need to
seed the PRNG used there from one used here. This class is still advantageous, however, as it centralizes other methods, such as
random_egd, in one place.
AUTHOR
Ian Robertson, iroberts@cpan.com
SEE ALSO
perl(1), rand(3), RAND_add(3), RAND_egd(3), RAND_bytes(3).
POD ERRORS
Hey! The above document had some coding errors, which are explained below:
Around line 62:
'=item' outside of any '=over'
Around line 93:
You forgot a '=back' before '=head1'
perl v5.12.1 2007-05-20 Random(3)