|submitted by atrueretard to Bitcoin [link] [comments]|
|submitted by SecuXvault to Bitcoin [link] [comments]|
submitted by SecuXvault to u/SecuXvault [link] [comments]
The 10 Best Bitcoin Wallets by Ezvid Wiki
We are so excited to announce that our Cross-Platform Crypto Hardware Wallets SecuX V20, W20, W10 have been listed in Ezvid's Wiki of the top 4, 7, 8 Best Bitcoin Wallets for 2020. The video wiki can be viewed here: https://wiki.ezvid.com/best-bitcoin-wallets
Life after lockdown: Contactless Crypto Mobile Payment Solution can be viewed here: https://www.youtube.com/watch?v=oJBcLiWJmaU
|submitted by SecuXvault to u/SecuXvault [link] [comments]|
|submitted by SecuXwallet to u/SecuXwallet [link] [comments]|
Hello,-------------- next part --------------
I'd like to introduce two proposed BIPs. They are primarily focused on
implementing the payment protocol using bluetooth connections. I've
been working on automated point of sale devices and bluetooth
communication is critical in my mind due to the potential lack of
internet access at many points of sale, either due to lack of cellular
internet coverage, lack of payee providing wireless internet, and/or
due to financial constraints of the payer prohibiting them from
maintaining a cellular internet service plan. These BIPs are largely
modeled after the current functionality of Andreas Schildbach's
android Bitcoin Wallet's bluetooth capability. I've discussed the
communication scheme with him in depth and believe these proposals to
clearly and accurately represent the communication scheme.
There is also an additional &h= parameter added to the bitcoin: URI
scheme which applies to both bluetooth and http payment protocol
requests which allows for a hash of the payment request to be
included. This hash was proposed by Andreas as an amendment to BIP72,
but others preferred not to amend BIP72 since it has already been put
into place. The current version of Schildbach's bitcoin wallet already
supports the "h parameter".
I'd appreciate feedback from everyone, particularly wallet developers
as widespread bluetooth support among wallets is very important to me.
I'm also very new to this mailing list as well as the BIP writing
process, so I'd appreciate your understanding if my conventions are
not standard. I am currently using the naming conventions "TBIP", so
that I can propose /temporary/ BIP numbers, and cross reference
between the two. Obviously these will change if the BIPs are formally
adopted. You can find a copy of these proposed BIPs at the following
If you are interested, you can see a demonstration of many of the
proposed features using Schildbach's wallet and my fuel pump in a
video I recently created: https://youtu.be/kkVAhA75k1Y . The main
thing not implemented is multiple URLs for the payment protocol, so,
as a hack, I'm just presenting https vi QR code and bluetooth via NFC
on my fuel pump for now.
There are a few known issues that could be improved to this bluetooth
communication scheme as well as the general payment protocol and
myself and Andreas would like to receive feedback regarding concerns
and potential solutions. Some of the known issues are:
Your comments and suggestions would be greatly appreciated.
- There may seem to be some inconsistency in the connection header
messages between the payment request connection and the payment
connection. This is largely because it is how Andreas originally
implemented the communication and is hesitant to change it since
there are many instances of is software already deployed that
implement this scheme.
- The current method uses an unauthenticated bluetooth connection
for bluetooth 2.1 and newer devices (subject to man in the middle
attacks, but not passive eavesdroppers), and an unsecure and
unauthenticated connection for older devices. The known concerns
here are that someone within 100 meters of the payer could track
the bitcoin addresses used for the transaction and could possibly
replace the refund address by submitting a forged payment message
to the payee. Requiring bluetooth 2.1 and authenticating the
connection out of band unfortunately don't seem to be as
straightforward/simple of a task with most bluetooth libraries
(although I'd love for someone to prove me wrong). It's possible
this communication scheme could be extended to use an https "like"
protocol that would not care if the underlying bluetooth
connection is authenticated or encrypted. It's actually possible
that http over a bluetooth socket (instead of tcp socket) could be
implemented, however it is presently uncertain whether this would
be too slow, too much overhead (both on the devices software and
communication), or if http could easily be run over bluetooth
sockets on all platforms.
- There is no acknowledgement failure message possible in the
payment protocol, only an acknowledgement message or lack of
acknowledgement message. This issue seems to be a concern and as a
result, the memo field is used to send an "ack" or "nack" in
Schildbach's wallet. Can we add a boolean status field to the
payment acknowledgement message?
- I'd personally like a new optional boolean field added to the
"PaymentDetails" portion of the "PaymentRequest" to allow for the
payer's wallet to match the "Output" optional "amount" fields as a
total amount of all Outputs, rather than requiring the amount for
each output to be matched exactly. As it currently is, the payee
can specify multiple receiving addresses in order to require a
payer split up the payments so that when the payee then goes to
spend the funds later, they don't necessarily have to give their
payees as much knowledge of their balances and spending and
receiving habits and sources. As the payment protocol currently is
requiring all output amounts to be matched exactly for each
output, there is no flexibility given to the payer in order to
reduce a merging or unnecessary diverging of account funds, which
can reduce the privacy of both the payer and the payee. If the
payee were given the option to allow the payer the option to
divide the amounts amount the outputs intelligently, there can be
some privacy gained.
- Amount of data stored in QR codes may be getting large when a
backwards compatible URL is used (for wallets that don't support
the payment protocol) and can be difficult to scan with outdoor
screens that have an extra weather resistant pane when in direct
- The number of offline transactions of a wallet is limited to the
known unspent outputs when they go offline. Long term, I'd like to
see wallet devices that can use systems such as Kryptoradio's
DVB-T based broadcast (but this will need yet another radio!).
Another project may be to develop a blockchain query protocol of
some kind where retailers can provide access to blockchain data so
that customer's wallets can update their known unspent outputs via
bluetooth. It's possible such a bluetooth system could be used in
combination of "Kryptoradio" like broadcasts to provide multiple
- The additional payment_url approach is a bit sloppy of a solution
in the PaymentDetails portion of the PaymentRequest. It would have
been ideal to just change this from an optional field to a
repeated field, however, the backwards compatibility in the
protocol buffer format will provide the last item in the array for
a repeated field (to a code that expects it to be an optional
field), rather than the first. Because of this, backwards
compatibility with https payment requests wouldn't work if the
payment_url field is just changed to a repeated field.
o Possible alternatives to what is described in the proposed BIP
+ Change payment_url to a repeated field and then reverse the order of the parameter numbers in the payment_url, compared to the bitcoin URL "r parameter". + Create an additional, new payment_url_multi repeated field (or some better name), and then leave the original payment_url field in there for backwards compatibility (and then maybe phase it out in the future).o Reference
+ [https://developers.google.com/protocol-buffers/docs/proto#updating](https://developers.google.com/protocol-buffers/docs/proto#updating) # "|optional| is compatible with |repeated|. Given serialized data of a repeated field as input, clients that expect this field to be |optional| will take the last input value if it's a primitive type field or merge all input elements if it's a message type field."
Bitcoin days destroyed for any given transaction is calculated by taking the number of Bitcoins in a transaction and multiplying it by the number of days it has been since those coins were last spent.So an appropriate pseudo-algorithm would be:
|submitted by ThePiachu to Bitcoin [link] [comments]|
submitted by transisto to WasabiWallet [link] [comments]
|submitted by HiIAMCaptainObvious to BitcoinAll [link] [comments]|
800C28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1DAnd it says that the SHA-256 hash of this is
8147786C4D15106333BF278D71DADAF1079EF2D2440A4DDE37D747DED5403592I'm not getting that. I've tried both an online hasher, and Python's hashlib, and I'm not getting that hash. Perhaps is the wiki incorrect? Or perhaps are they using a different hash algorithm than SHA-256?
e2e4146a36e9c455cf95a4f259f162c353cd419cc3fd0e69ae36d7d1b6cd2c09as the SHA-256 hash.
|submitted by moon_drone to BetterBitcoin [link] [comments]|
“This is not a speculation, nor is it a hedge. This was a deliberate corporate strategy to adopt a bitcoin standard.”Let's unpack it and jump into the economics Bitcoin:
The essential measures that ended hyperinflation in each of Germany,Austria, Hungary, and Poland were, first, the creation of an independentcentral bank that was legally committed to refuse the government'sdemand or additional unsecured credit and, second, a simultaneousalteration in the fiscal policy regime.In english: *hyperinflation stops when the central bank can say "no" to the government."
The Federal Reserve is prepared to use its full range of tools to support the flow of credit to households and businesses and thereby promote its maximum employment and price stability goals.In english: We're going to keep printing and lowering rates until jobs are back and inflation is under control. If we print until the sun is blotted out, we'll print in the shade.
“We feel pretty confident that Bitcoin is less risky than holding cash, less risky than holding gold,” MicroStrategy CEO said in an interview"BTC is less risky than holding cash or gold long term" is nonsense. We saw before that BTC is more volatile on face value, and that as long as the Fed isn't run by spider monkeys stacked in a trench coat, the inflation is likely to be within reasonable bounds.
submitted by ripper2345 to Bitcoin [link] [comments]
|submitted by Leader92 to Bitcoin [link] [comments]|
Paper wallets have just one Bitcoin address, leading to address reuse. Poor user experience. Dealing with raw private keys can be unintuitive and may lead to loss of funds if not managed properly. It is recommended that users of paper wallets understand how they function before using them as long-term funds storage. Bitcoin ATMs and paper wallets . Many Bitcoin ATMs use a paper-wallet-like ... Bitcoin Core. The original Bitcoin client stores private key information in a file named wallet.dat following the so called "bitkeys" format.. The wallet.dat file contains your private keys, public keys, scripts (which correspond to addresses), key metadata (e.g. labels), and the transactions related to your wallet. Von daher sollten Sie andere Arten von Bitcoin Wallets verwenden. Andernfalls sollen sie Online Services sehr sorgfältig auswählen. Zusätzlich wird empfohlen, Zwei-Faktor Authentifizierung zu verwenden. Geringe Mengen für den täglichen Bedarf. Eine Bitcoin-Wallet ist wie eine Geldbörse mit Bargeld. Falls Sie nicht mehrere tausend Euro in Ihrem Geldbeutel aufbewahren, sollten Sie das auch ... Cryptocurrency wallets list will give you the conception of developed wallets in cryptocurrency world. There are the best cryptocurrency wallets for the storage of Bitcoin and other cryptocurrencies. Top bitcoin wallets to use. Crypto Wallets list  Die meisten Wallets sind in der Lage, etwas an Altadressen zu senden bzw. von diesen zu empfangen. Altadressen beginnen mit 1 oder 3 (und nicht mit bc1). Ohne die Unterstützung von Altadressen sind Sie nicht in der Lage, Bitcoin von älteren Wallets oder Börsen zu empfangen.
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