It is totally new term, I don't think technology insurance is known to even tech guys who deal it on day to day basis.
To answer the question "What is technology insurance?" you need to be expert of several subjects including technology and insurance which need very comprehensive knowledge.
What are the elements of insuring the technology is first step to establish the coomonly acceptable answer. Aadhaar technology is emerging field although it has taken large shape using available and new resources but I don't think it to be a mature field.
Technology is broad term covering various sub categories and considering all those you have to look on insurance in complete perspective to evolve the technology insurance theory.
What is the field scenario in technology insurance working in real ground?