"I am confident, in retrospect, that he did not give the South Africans information on how to get me out."
Pietersen, quickly 'reintegrated' into the England set-up during the subsequent tour of India under new captain Alastair Cook, is in line to play his 100th Test in November's Ashes opener against Australia in Brisbane.
Earlier this month Strauss, asked about the possibility of succeeding Morris as the ECB's managing director of cricket, said: "I'm looking into it but they're decisions that need to made over the next couple of weeks and I'll think quite long and hard about whether it's the right time and the right job for me."