"No comment," say both RSA and NetWitness about any such deal, but several sources say the buzz about a potential acquisition is getting attention in several quarters.

"It makes sense from a product point of view," says Robert Breza, managing director at RBC Capital Markets, who predicts there's likely to be a public announcement about RSA acquiring NetWitness by the next quarter.

MERGER RECAP:

MORE ON RSA:

Industry watchers note that RSA could strengthen its security information and event management (SIEM) product by acquiring NetWitness, which was founded in 2006.