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2) First, we should have had stricter controls on which accounts could push signal updates. This is our fault, and earlier tonight we significantly increased the old security around it, moving it closer to in line with the security we have around trading functionality.

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3) There were about 30 minutes of off and on availability issues while we completely purged all of the offensive content from the system; beyond that, @blockfolio remained online today.

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4) We have spent the last four hours investigating every angle and tracking down leads; we're relieved to say that we've figured out what happened.

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5) This offensive content was produced and published by a competitor exchange of ours who maliciously gained access to someone else's Blockfolio News/Signal capabilities.

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If I can ask, how did you figure out with certainty that it was a competing exchange vs. someone just spoofing their IP from some competing exchange. Would be fascinating to know a little more details here and not about who did it