"Massive breach" refers to a significant and serious violation or intrusion that involves accessing, stealing or exposing a large amount of sensitive or confidential information. Full definition
He also said that users understandably can't help feeling like there's been a «massive breach of trust». (pcworld.com)
Some of the biggest risks right now besides the volatility within the space have a lot to do with the exchanges and massive breaches in security. (coinstocks.com)
It is also the second massive breach linked to Experian. (reuters.com)