Kriya Yoga is a scientific and ancient technique that was lost from the worldliness for centuries.
In 1861 Yogiraj Lahiri Mahasaya re-introduced Kriya Yoga to the seekers of truth from his immortal gurudeva Mahabatara Babaji Maharaj from the Himalayas.
Lahiri Mahasaya taught Kriya Yoga to Swami Sri Sri Yukteswar Giri and his other diciples.
Paramhamsa Yogananda and Paramhamsa Hariharananda were disciples of Swami Sri Sri Yukteswar Giri. Both Paramhamsa Yogananda and Paramhamsa Hariharananda attained the highest stage of yoga.
On the eve of journey to America Paramhamsa Yogananda handed over all the responsibilities of Karar Ashram, Puri later Paramhamsa Yogananda also authorised Paramhamsa Hariharananda to initiate people into Kriya Yoga.