The chairman of the Bloody Sunday Inquiry, Lord Saville, said he does not believe any genuine claims for anonymity in the inquiry have been prejudiced.
He also defended close questioning of witnesses who are rumoured to have been in the IRA.
Earlier, counsel to the Bloody Sunday Inquiry, Christopher Clarke QC, was accused of effectively blowing the cover of Official IRA men seeking anonymity to testify at the hearings.
The claim was made by barrister Richard Harvey, who also alleged events at the inquiry may have a bad effect on efforts to draw out other potential IRA witnesses.