Judaism's position on the question of freezing/suspending life

There are companies that offer a freezing process after a person is declared legally dead in the hope that future technologies will be able to revive and cure them. There is also research underway into the possibility of suspending life for a period similar to the hibernation of other mammals in order to facilitate travel to other stars and give hope to incurable patients. The question is, from the perspective of Jewish law and perspective, does this issue constitute a problem and a loss of life in doubt?