Loyalist blogger Jamie Byrson has secured a temporary court order to prevent investigators examining seized computer equipment, his lawyer confirmed on Friday.
Mr Bryson issued proceedings connected to his arrest during a probe into the suspected illegal supply of door staff.
He was detained in August and later released without charge.
At the time police, working alongside the Security Industry Authority (SIA), searched addresses and premises in Bangor, Donaghadee and Newtownards, Co Down.
A number of items including documents, laptops and a iPad were reportedly seized.
Mr Bryson has launched a High Court challenge to the legality of the search warrant process.
His lawyers went before a judge on Friday seeking interim relief to stop the SIA examining the material until the case is determined.
Solicitor Darren Duncan confirmed outside court: "My client has secured a temporary order in relation to seized digital equipment, and is anxious to have the matter aired fully on the next court date."
The interim measure remains in place until a further hearing listed for two weeks time.
No decision has been made on the merits of Mr Bryson's case.