PhD Candidate Yonatan Sompolinsky and Dr. Aviv Zohar, Both of the Hebrew University of Jerusalem , published an article this week on a new scalable BlockDAG The 2013 paper by Sompolinsky and Zohar on the GHOST protocol introduced the BlockDAG structure – which essentially transforms the Bitcoin Blockchain structure into a tree – as a way to improve security and speed up transaction times.

In a conference at Blockchain in Berkeley in November 2017, Sompolinsky explained that the BlockDAG structure served everyone simultaneously. This is in contrast to the Blockchain structure, in which new blocks are added one at a time once they have been checked.

<img alt=" DAG mining "src =" https://cointelegraph.com/storage/uploads/view/0188d5b9eff1ee6275792ad006f78f54.png "title =" DAG mining "/>

PHANTOM article relies on SPECTER protocol of researchers, which confirms transactions with a recursive vote of previous blocks.PHANTOM will use a "greedy algorithm" on a BlockDAG protocol to create a more linear block structure by "distinguishing [ing] between blocks extracted correctly by honest knots and those extracted by non-cooperative knots that deviated from the DAG exploration protocol. "

The linear structure of PHANTOM means sacrificing more confirmation times that came with SPECTER, although the document evokes the possibility of combining the two protocols in order to "enjoy the best of both worlds."

Alt Although most crypto-currencies operate on a Blockchain protocol, many work on BlockDAG. Byteball is a DAG-based currency in which transactions are linked together and contain hashes of previous transactions. IOTA is also based on DAG – creating a new transaction must validate at least two previous transactions.