Show Me The Bitcoin! - use plain images as Bitcoin keys, send BTC via email

[drazvan]

And the third one is gone, it was on MtGox (their logo on top left - the only image left on their website ).

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[Bit_Happy]

Small amounts don't need to worry about security.
This project is fun and helps make BTC easier for the masses. 

[KaChingCoinDev]

I was looking on Bitcoin.org lol

[wachtwoord]

Cool idea but isn't the safety from using this app negative correlated with the success of the app? I mean if this get's widespread usage won't every thief try to install the app?

[Sophokles]

And the third one is gone, it was on MtGox (their logo on top left - the only image left on their website ).

Cool idea, just like a belated easter egg hunt ! 

[KaChingCoinDev]

How about we do more!!! Im willing to pitch in to put a random amount of BTC in different photos !!!

[drazvan]

How about we do more!!! Im willing to pitch in to put a random amount of BTC in different photos !!!

Go right ahead, I'm off to bed for now (it's 1 AM here) but I may post more tomorrow. Just download the image you want to add funds to, open it in the app, add the funds, then post some sort of hint here. Make it as easy or as hard as you want .

[davidgdg]

Attacker?? You expect people to send their private keys off to someone expecting money. Instead the recipient of their email is just going to clean them out.

No, you are not sending them your private key! You are creating a private key for the purpose of that transaction, deriving a Bitcoin address from it, then sending only the funds you want to transfer to that newly created address. This is similar to the current payment process, where the recipient of the funds creates a new address to receive the funds - but it's the trusted sender that creates it, not the recipient. The recipient can not clean you out, they only have access to the funds you have attached to the image, nothing else.

Better now?

Ok this is just a whole lot of horse crap. I can only conclude that the OP is a scammer and he's got a lot of shill accounts supporting him in this. I am done with this thread.

You are a bit confused. Let me explain. Take a JPG of Auntie Ethel. Hash it using SHA256. Insert the hash in brainwallet.org. Transfer btc to the resulting private key. Now send the JPG by open email to the intended recipient with message "Here is the photo of Auntie Ethel as discussed". Separately tell the recipient to hash the JPG and use the private key to transfer the btc to an address (s)he controls.

What the OP has done is nicely automate the first part of the process. Basically it is just a version of transferring BTC by giving somebody your brainwallet passcode. No scam involved. I think you should apologise. 

[dexX7]

Hey OP, I like the idea, but maybe you could include a transaction which spends some coins instead of a private key, depending on your ultimate goal.

[Chrithu]

I like it. Basically it is the same as giving away a filled paper wallet as a gift. Sure it isn't the intended way to transfer bitcoin by handing over the private key of an address that was filled with the money that is meant to be transfered, but it still is nice enough. Sadly I am stuck with an old smartphone and CM 7.2 (which is android 2.3 if I am not mistaken) so I can't test it.

[gagalady]

Is this only for bitcoins or supports other popular alt coins too, like dogecoin, litecoin ect..?

[e4xit]

Could you make it more computationally expensive to derive the key from the image, so that would-be-attackers can't just hash every image they can get their hands on. Similar to how brute-forcing BIP38 keys is impractical (currently)...>?

I think the correct terminology is to introduce more rounds of hashing, but must admit in this area I start to fall down a little...

Either way, nice app!

[drazvan]

I like it. Basically it is the same as giving away a filled paper wallet as a gift. Sure it isn't the intended way to transfer bitcoin by handing over the private key of an address that was filled with the money that is meant to be transfered, but it still is nice enough. Sadly I am stuck with an old smartphone and CM 7.2 (which is android 2.3 if I am not mistaken) so I can't test it.

Thank you! I've just published a new version that is supposed to work down to Android 2.3 GingerBread. I no longer have a device with Gingerbread here, so I would appreciate it if you could give it a try. If it shows your phone as incompatible, try in a few hours, Google takes its time to update the Play Store listings.

[drazvan]

Could you make it more computationally expensive to derive the key from the image, so that would-be-attackers can't just hash every image they can get their hands on. Similar to how brute-forcing BIP38 keys is impractical (currently)...>?

I think the correct terminology is to introduce more rounds of hashing, but must admit in this area I start to fall down a little...

Either way, nice app!

Yup, I'll add that, although it won't be the default - I want to keep the default very simple, "the image is the key". For the more advanced users, there will also be a password that gets thrown into the mix when the private key is derived from the image content.

[drazvan]

Is this only for bitcoins or supports other popular alt coins too, like dogecoin, litecoin ect..?

I do plan to make it at least for Dogecoin and possibly others - it shouldn't be very hard, just need to find the time for it.

[KaChingCoinDev]

Some BTC hidden in an image related to CryptoCurrency!

[genjix]

well done OP. we appreciate your work. good on you for actually making something cool. app is a nice idea. thanks & soldier on

[CrystalClear]

Interesting idea indeed, you can have fun with it like a scavenger hunt, cheers!

[coinnewbit]

IMO, this will make for a great net bounty hunt!

[drazvan]

Well, feel free to use it then . You can post the clues on this thread if you want. If you have a blog or a website you'd like people to visit looking for clues, you can do that too.