Quote from: Kprawn on May 01, 2018, 01:31:10 PM

I have watched some videos on Youtube today and they were speaking about Crypto currencies and ways to track Crypto
currency users, through services that they use. Is this the weak link in the privacy chain? Should we ask Crypto currency
merchants to "change" their receiving addresses more frequently to make it more difficult to pin a specific address to a
specific service?

for merchant tools like bitpay. they use unique addresses per payment already.

Quote from: QuestionAuthority on May 01, 2018, 04:37:48 PM

If youre the customer of a brothel where you routinely cheat on your wife and you pay the same receiving address in btc every time and the only thing they sell is sex then youre in trouble.

EG. if the stripper has a QR code tattoo'd to her butt.. your wife can easily find out the exact stripper which ruined the marriage just by QR scanning the ass of all strippers while they are pole dancing until th right address grinds up.

solution:.. pimps, do not let your sex workers get a permenent tattoo of an address they are stuck with for the rest of their lives

Quote from: OmegaStarScream on May 01, 2018, 03:04:05 PM

It's not the service itself that you should be afraid of, It's the payment processor (BitPay in this case) which is pretty much used everywhere now. You could read this about the privacy and security concerns: https://bitcoinmagazine.com/articles/wallet-developers-express-security-concerns-over-bitpays-payment-protocol-policy/

the whole bip 70 is not a security flaw

what it is, is when you are at a merchant shopping cart YOU (not the network).. YOU are displayed a QR code. which is not just a bitcoin address but a bitcoin address with a lil extra.

(its the bitcoin URI feature)
EG
bitcoin:1R4ndQm9ir2761987q7k3VcALC8YQ?request=https://walmartstore.com/r/aBcdE&order=123&memo=bakedbeans&value=0.0001

YOU and only YOU see this. its not something published onto the blockchain.
your wallet can then auto fill in not only address to send, but how much and what your buying.

your wallet can then send the signed TX through the normal network(not extra URI info).. and/or
send the signed tx+URI data as a pushtx api call to the store direct so that you can memo them 'deliver by 4pm'

again this is for you and your wallet to know what its for, not something that gets identifying info locked into the blockchain