You’re A Professor of Crip — ology?

I was interviewed on LBC last week about NHSX App, and realised that some people in media struggle a bit “Cryptography”. When the editor called me she said

“How do you want to introduce yourself — you are a professor of crip-mm-graphy?”

“No, it’s cryptography”. And then the radio presenter:

“And so we have Professor Bill Buchanan, and who is a…