> they cannot be that stupid Oh yes they can. Also, assume you have the key - what you do with it? You don't know how the files were encrypted, in which way t

> they cannot be that stupid Oh yes they can. Also, assume you have the key - what you do with it? You don't know how the files were encrypted, in which way they were stored afterwards, etc. There are many ways one can encrypt and write data, even with the same key - you obviously need the algorithm, but also there are often parameters (e.g. block sizes), storage formats etc. The easiest way to deliver all that is to provide a program. Otherwise, what a random "press any key" IT person would do with an encryption key? They probably don't even have any tools that can do encryption on any of the systems. Do they have to write those themselves? Use OSS tools - which ones? With which parameters? What if it doesn't work?