The Times today reports that the House has passed a broad measure encouraging companies to open their networks and records to Federal investigators of cyber breaches. Since the Senate Intelligence Committee has recommended a similar measure and since the Administration seems on board, we may be seeing legislation soon.
In broad outline, companies would be protected from liability for disclosure, but only provided that their data is scrubbed of personal information. Resistance historically has been expressed by Republicans worried about government burdens on business and by fears from all over the spectrum that giving more data to the government is just never a good idea; the liberal Massachusetts House delegation was pretty split in voting on the House Bill (which passed by a three-to-one margin).