It is all a bit murky anyway!
I put on gloves and a mask,just in case.
It seems to be putting in a complicated security system in front when the back door is open and there is no garden fence.
Correct me if from the slightly unjoined up statements on the link I have been misled, but this doesn`t do a mission impossible " this message will self destruct in...".
It relies for its security on trust relationships, If a recipient saves a decrypted copy ( you have to be able to display it to read it, so at crudest, what is to stop a screen grab, and feeding the file into an OCR?) then that will persist for however long they decide, which brings into question what the point of it is?
A whole set of considerations are not really answered very well.
Isn`t a P2P network likely to scrutinised by various authorities to regulate illegal use? Won`t they be able to decrypt and save content? ( within 8 hours)
It appears to use properties of the third party P2P network software, so it is dependent on their infrastructure and reliability.
There is a serious problem as the description appears to say the system does not use the basis of all security encoding, a shared secret ONLY between sender and recipient. ( I don`t trust a P2P setup and I can`t think of any organisation that would condone the use at work of any external network for security and legal reasons).
Don`t send anything outside your PC that you aren`t prepared to weather the storm over. It is like party photos, If you did dance with a lampshade on your head you have to deal with the fall out IMHO (from having done things that seemed a good idea at the time)
Fire guards from Bournville?