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Re: [Taler] 36C3 Demo

From: Florian Dold
Subject: Re: [Taler] 36C3 Demo
Date: Tue, 7 Jan 2020 18:06:50 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1

On 1/7/20 5:38 PM, David Kleuker wrote:
> Hello,
> i think an independent free software android app
> with an open standard format would be better.

Yes, that's what I'm talking about!  I think the GNU Taler wallet would
be a good place to integrate the implementation of such a standard
(which we might have to design first!), as it already manages "receipts"
of purchases.  If I'm already using GNU Taler to buy stuff with
electronic cash, I don't see why I would want a separate app with
separate synchronization / backup to store my electronic receipts for
purchases with on-electronic cash.

If we implement such a feature *really well* in the GNU Taler wallet, of
course based on an open standard, it might be a way to get more users
and merchants to know about the rest of GNU Taler too.

> Similar to PassAndroid, maybe that could be used as a base.

I'm a happy user of PassAndroid myself, but it serves a different
purpose, as far as I know.  It doesn't have any backup & synchronization
features, something that we have to get right for Taler anyway.

Same with "graphs and analytics", it's something we want for the GNU
Taler wallet anyway (we already had a GSoC student working on it,
unfortunately they dropped out).  This can then easily be re-used for
the E-Bon / electronic purchase receipts.

Of course developing an open standard and then implementing it in our
wallet doesn't stop other apps like PassDroid from offering it too.

- Florian

> https://f-droid.org/de/packages/org.ligi.passandroid/
> Such an open standard could be used by any app and
> the FSFE could promote it as open standard.
> The free software app should provide all the fancy features
> a user would expect from a cloud app like graphs and analytics, but all 
> locally.
> That would be indeed perfect for Prototype Fund and probably other funds.
> Maybe ligi is interested to start such a project?
> kind regards
> David
>> Florian Dold <address@hidden> hat am 7. Januar 2020 um 14:19 geschrieben:
>> On 1/7/20 12:40 PM, Hartmut Goebel wrote>>> That would help with the new
>> law in germany where customers need to get
>>>>> a receipt in all stores ("Bonpflicht").
>>> We could try to make this into a selling point for Taler.
>> That's a great idea, and there's also another project idea hidden in
>> there: E-Bon management.  The GNU Taler wallet already needs to manage
>> users' purchases and sync them in a privacy-conscious way.
>> There are already some shops in Germany (like Rewe) where you can,
>> instead of getting a wasteful paper receipt, use their app to receive
>> the E-Bon.  What's terrible though is that this is just covering up
>> another customer data collection scheme, they require you to give your
>> payback card, otherwise you won't receive an E-Bon.
>> Maybe for smaller businesses this would be a use-case for Taler even if
>> no e-cash is involved.  You pay, and then scan a QR code or NFC tag at
>> the shop's counter.  If scanning fails or there is no internet, a paper
>> receipt is printed (potentially with a QR code where you can add the
>> receipt to your wallet later).  If scanning succeeds, the wallet
>> contacts the merchant backend and downloads the E-Bon.
>> This way even people/businesses that are not primarily interested in the
>> E-Cash aspect would have a reason to use Taler ;-)
>> If somebody wants to apply with this idea for the next Prototype Fund
>> round, I'd be happy to help with that.  That sounds like a great match,
>> it has privacy and environmental protection (no dead trees for buying a
>> pretzel) in there.
>> - Florian

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