Deloitte' s Email System Hacked

[Lee B]

The international accounting firm Deloitte announced today that they discovered back in March that their email system had been hacked back

in the fall of 2016. They reassured everyone that no client's confidential information had been affected.

My question is, how would they know ?

 

[rfassett]

Apparently they have reviewed all of the emails since they discovered the hack SIX MONTHS AGO.  The real question to be asked is "why did it take six months for them to disclose a hack that had taken place six months before the discovery?"

But then, I know of smaller practitioners whose emails have been hacked.  I wonder if they informed their client base of the breach.  And to your question, how would they know if client info had been affected?