EXCLUSIVE — The Social Security Administration (SSA) on Tuesday told lawmakers its systems are secure and pushed back on allegations from a former senior official who claimed the agency mishandled sensitive personal data.

In a letter to Senate Finance Committee Chairman Mike Crapo (R-ID), SSA Commissioner Frank Bisignano said the agency found no evidence that its Numident database, which contains personally identifiable information on nearly every American, had been “accessed, leaked, hacked, or shared in any unauthorized fashion.”