The Justice Minister said he was continuing to work with the Prison Service and other appropriate authorities to consider any further implications for the security of prison officers, on 5 November 2012.
David Ford was responding to an urgent question asked by Justice Committee chairman Paul Givan.
The safety of Northern Ireland prison officers is under scrutiny following the murder of their colleague David Black.
The 52-year-old father of two was shot dead on the M1 in County Armagh on 1 November as he drove to work at Maghaberry Prison.
Mr Givan said that even before the death of Mr Black, he was aware that prison officers felt their security was not being treated seriously.
He said he wanted assurance that home protection schemes were maintained on a regular basis.