Complex sentence: One month later, in March 2014, OneName was released-a decentralized identity system built on top of the Namecoin protocol that stores usernames and personal profile data in the Namecoin block chain.
Split into simpler sentences: One month later, in March 2014, OneName was released. It has a decentralized identity system built on top of the Namecoin protocol that stores usernames and personal profile data in the Namecoin block chain.