My encrypted hard drive, a Western Digital WD5000BPVT running Ubuntu 14.04, crashed and the person doing the data recovery on it is asking where the encryption key is stored on the hard drive so that he can focus his repairs in that area. He is also asking what kind of encryption it is and other info but I think I can find that in other questions.
He also told me I should try to find the original device because it might be encrypted with that laptop's serial number. It's very important to me that this guy does not find out what is on this hard drive because it's a cryptocurrency wallet and he could steal it without a trace.
Is it unreasonable for me to ask him just to make an image of the disk? Should I find a new recovery guy?