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Bitcoin Core developer Peter Todd has launched a series of disparaging tweets about the R3 blockchain consortium’s platform Corda. In late November the cryptography consultant explored the insides of the Corda system and was left unimpressed.

“I haven’t seen anything in the Corda docs that defines what problem it actually solves,” wrote Todd. “What bad things does [it] prevent?” Without a threat model, he adds, there is no discernible benefit of using Corda over a traditional database. “Of course, I could list a dozen reasons,” Todd states. “But it’s weird that R3 is so short on security talent that they haven’t written that down yet.”

He goes on to wonder if the reason R3 has started to lose the backing of major banks – including Santander and Wells Fargo – is because the firm failed to explain properly what it could do. “A savvy bank IT guy may very well look at Corda and decide to spend the money on traditional security measures for their databases instead.”

He calls Corda “alpha quality” because it “can’t even handle malicious inputs”. Though there are a number of retweets and replies on Todd’s observations, there is no sign of a comment from the R3 consortium itself.

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