  The security of any cryptographic scheme relies on access to random number
generators. Device-independently certified random number generators provide
maximum security as one can discard the presence of an intruder by considering
only the statistics generated by these devices. Any of the known
device-independent schemes to certify randomness require an initial feed of
randomness into the devices, which can be called seed randomness. In this work,
we propose a one-sided device-independent scheme to certify two bits of
randomness without the initial seed randomness. For our purpose, we utilise the
framework of quantum networks with no inputs and two independent sources shared
among two parties with one of them being trusted. Along with it, we also
certify the maximally entangled state and the Bell basis measurement with the
untrusted party which is then used to certify the randomness generated from the
untrusted device.
