One idea: it might be worth asking for email addresses. You already had 27 people interested. Build a quick unbounce page and get the emails so you can recontact.
Thank you. I appreciate the screenshot. Interesting; I get the feeling the tag algorithm is crucial to make it work. Not sure it's such a clear no-brainer as I first imagined it...
They answer this point on the website:
"Q: Why do you use SHA-1 in the place of a MAC?
[...] since this means still requiring at least 2^128 operations (instead of 2^256 with, say, SHA-2) to even begin trying to break this scheme, the trade-off seems fair."
Why not break the crypto (and take the money) if it's so amateurish?
The easiest to understand response to this question that I've seen so far is from this comment [0]:
The contest limitations rule out most of the likely attack vectors for breaking the protocol in the real world. It's like saying "Our bank vans are 100% secure. Just try stealing money from them without puncturing our tires or bribing one of our employees."
In particular none of the attacks described in TFA (Known Plaintext, Chosen Plaintext and Chosen Ciphertext) are possible within the frame of their contest (since Telegram controls all inputs).
More to the point, KPA,CPA, etc are very important, and systems should be definitely tested against them, but in real attacks, they may not be available
""It's legalized front-running. I think it is basically evil and I don't think it should have ever been allowed to reach the size that it did," he said. "Why should all of us pay a little group of people to engage in legalized front-running of our orders?""
What's the difference between HFT and traditional Human Market Makers?
May I suggest that Electronic trading and HFT have made it possible for a few people to do the work of thousands. This has brought down the cost of trading.
SGD is fast but not necessarily more accurate. If you've got lots and lots of data, then a simple yet fast approach is likely to be a good choice to start with.
see the movie "Her"
http://www.imdb.com/title/tt1798709/
how many people will fall in love with Watson?