This often prevents further growth of Tangle network. As the number of invalid leftover transaction increases the vulnerability to hackers would multiplies as well.īefore this improvement the random walker who creates the path of Tangle halts with invalid transaction and prone to make blowballs which are chunks of transactions pointing to a single specific transaction. Imagine a hacker exploits this invalid transaction with his or her own side tangle. The unconfirmed leftover invalid transaction might have caused the side tangle we have here now. But I guess avoiding something could can cause some issue later. Other more critical improvement on tip selection of Tangle is that they make random walker which takes the path of tangle randomly avoid invalid transaction instead of rolling back to previously known safe valid transaction in their past path. The original IOTA white paper said so but IOTA development team applied at first simplified weight algorithm instead of cumulative weight algorithm, but why? It is actually answered at the Tangle white paper.4) The white paper says that with cumulative weight transaction calculation there were high possibility that Tangle might have had hacked at the beginning of Tangle network and that’s why they applied simplified weight calculation for transaction and employed coordinator. Why IOTA development team designed and implemented a coordinator as a mitigator to the ‘tip selection’ situation? Doesn’t this mean IOTA face more than expected Tip Selection situation they have anticipated when they design Tangle? This could be why the coordinator were designed and implemented at first.Īfter reading the recent tip selection algorithm change notice IOTA development team announced 3) just before this side tangle issues happen I became more confused than before because it says that the development team changed the Tip Selection algorithm from simplified weight algorithm to cumulative weight one for their transaction calculation.
Iota tangle bug verification#
The question is that does two previous transaction verification is enough to prevent any adversary? Tangle only verifies two previous transactions at any given time and this makes Tangle really fast in transaction confirmation. The most critical issue of tangle is however not the name it is they way IOTA developers applied the DAG into tangle.
“I tangled my foodstep and fallen into a ditch” What kind of name is the tangle for critical consensus mechanism? Tangle is the verb when you say, The name tangle itself does not give us that much positive impression. SegWit of bitcoin has done this and many other cryptocurrencies work on same thing such as Plasma, Lightning Network and others. When you try to apply totally new technology you must have had thorough testing and verification process before it goes to live. “Currently the confirmed transaction ratio in iota is practically 0 because someone is stitching the side tangle to the main tangle and this apparently breaks regular nodes ability to select tips…”Ī researcher of Open Privacy - A Canadian non-profit society dedicated to researching & building privacy enhancing tools that empower people & marginalized communities said in the article. Due to side tangle increasing and trying to become main tangle all transaction of IOTA has been stopped.2) on July 6th. This time the situation is even more grave than having side tangle. Some cryptocurrency exchanges made another ban on the deposit and withdrawal of IOTA wallets. This is actually genius except that it has never been applied before. The more IOTA has its users the faster the transaction confirmation speed increases. The approval of these previous two transactions dramatically reduces the workload of IOTA’s proof of work compared to that of Bitcoin.Ĭompared to the linearity of Bitcoin blockchain IOTA’s tangle is exponential and means bitcoin’s blockchain addition IOTA’s Tangle multiplication. Tangle is basically the proof of work consensus algorithm for previous two transactions for the current transaction. IOTA is based on Tangle which is based on DAG but modified to support faster and reliable consensus for their transaction confirmation. However IOTA is not exactly solely based on DAG. Tangle is based on DAG(Directed Acyclic Graph) that is also used for Hashgraph, Raiblocks, DagCoin and Byteball. Three days after my previous post 1) on IOTA's side tangle (parasite tangle according to Tangle white papper) cryptocurrency exchanges again halt deposit and withdrawal from IOTA's wallets claiming that side Tangle issues were not resolved.Īs I mentioned at my previous posting IOTA uses new consensus algorithm Tange different from other blockchain based coins.
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