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A lot of questions I want to ask. The first being, is it open source?

Also there is no central server, but currently message are given by the company... Which means all mining or currency creation is handled centrally. Ergo central server.

Metadata collection is still possible because identifier hashes have to be unique. So its really not secret who is talking to who (much like PGP).

Still no mention of the algorithm. Is it a public/private scheme? Because that bad, as computing power advances those will become easier to crack meaning permanently stored, public messages will become readable ~5-10 years after sending.

Hi, glad you like it :)

We are looking into open sourcing this, it is built on a really cool messaging feature in NXT that has recently received it's own standardized encryption at the protocol level, which makes things a lot easier; https://bitbucket.org/JeanLucPicard/nxt/commits/all

We actually don't do currency creation; we just give you 50 NXT (testnet NXT for the beta) and then you send those with their attached message which is encrypted. If you want more messages you just need more NXT which we allow the easy purchase of via BTC or at some point soon fiat.

We don't collect any user data; all the data is in the NXT blockchain, this is a secure web-layer to interact with that blockchain for it's encrypted messaging functionality. Coin validation is its own large problem regardless of the web-layer that entered the message.

Yes, NXT messages do not expire at the moment, though this feature is being considered; this is indeed a problem with blockchain based messaging that is difficult to solve well at the protocol level. Once you start making certain transaction types expire then where does that slippery slope stop?

This product has now been rolled into http://www.secureae.com/'s https://trade.secureae.com/ messaging feature to securely message any Smart Contract owners account directly using NXT's new standardized message encryption. More secure messaging is great but Smart Contracts are clearly the future!!!

If you'd like to know more about how to apply the NXT messaging feature feel free to reach out to us: info [at] secureae [dot] com

thank you because transparency is very key especially when you are talking about encryption.