Questions tagged [authentication]

Authentication is the act of ascertaining the origination or state of something.

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14
votes
3answers
4k views

Which Two-factor authentication methods are available at which exchanges?

I see that Mt. Gox now supports the Google Authenticator app (on Android, iOS - iPhone, iPad, iPod Touch, and on Blackberry) for 2-factor authentication (in addition to support for Yubikey, of course)....
12
votes
2answers
904 views

How would we know the real Satoshi?

Should Satoshi decide to reveal his or her true identity, how can one know the person is the real creator of Bitcoin, rather than a person who hacked the forum login, email address or the like? In ...
6
votes
1answer
3k views

BitFinex API call returns 400 bad request

Trying to get authentication with BitFinex to work. Docs here: https://www.bitfinex.com/pages/api Say the client wants to make a request to POST https://api.bitfinex.com/v1/order/new ...
6
votes
2answers
165 views

Wladimir's new GPG key

I just went to install the latest version of bitcoind and discovered that Wladimir has signed the https://bitcoin.org/bin/bitcoin-core-0.12.1/SHA256SUMS.asc file with a new GPG key: https://bitcoin....
6
votes
3answers
3k views

Which exchanges support U2F authentication? [closed]

I got myself a nice security key (Yubico Fido) today, which utilises the U2F protocol. But to my surprise not a single Bitcoin exchange seems to support this yet, only Google itself. So which ...
4
votes
4answers
346 views

Why bother checking both public key and signature in P2PKH transactions?

In a P2PKH pubkey script, first, the public key provided by the intended spender is verified to be correct and then this key is used to verify the spender's signature. I wonder why just verifying the ...
4
votes
2answers
207 views

How can multifactor authentication be used when there needs to be two people with access?

For a business account at a Bitcoin exchange, either of two people need to be able to send bitcoins or withdraw. This account will be configured with two-factor authentication. How can two of the ...
3
votes
1answer
340 views

What is Mt. Gox's YubiKeys' “configuration protection access code”?

Does anyone know if Mt. Gox, now that they're bankrupt, has released their YubiKey's "configuration protection access code" (cf. this)? If so, we could reprogram the free YubiKeys they sent us and use ...
3
votes
1answer
3k views

Miner username and password - does it need to be unique in the major pools?

Every Bitcoin mining pool relies on Basic Access Authentication to identify the user and credit their account for the work performed. But does this identification in form of username and password have ...
3
votes
0answers
457 views

bitcoind inconsistent authentication error

I am using a Linux computer. The issue I am having is that sometimes I have to use "kill -s 9 (bitcoind pid)" and restart bitcoind using "bitcoind -txindex" because bitcoind will sometimes not let me ...
2
votes
1answer
34 views

How to add a second user with SSH access to my Ubuntu PC running Bitcoin Core?

I have a friend who is interested in learning Bitcoin CLI, and I told him I would look into giving him access to my node - in a non-destructive way - perhaps testnet only ? Totally trust this person, ...
2
votes
1answer
3k views

bitcoind: incorrect rpcuser or rpcpassword (authorization failed)

The host system is Linux Debian Stretch (9 / testing). The Bitcoin Core package for Linux I have just downloaded and verified and installed. I have created the following file: /home/myUsername/....
1
vote
2answers
862 views

API Authentication via Python

I'm having trouble following LakeBTC's API instructions for connecting to their API via Python. API Documentation: https://www.lakebtc.com/s/api I have my key (email address) and secret. I'm using ...
1
vote
1answer
59 views

How to connect LND to bitcoind RPC with authentication cookie stored in a custom folder?

I configured bitcoind RPC to authenticate clients with an authentication cookie. However I cant figure out if it's possible to use this method with lnd while connecting to bitcoind RPC. I would like ...
1
vote
1answer
3k views

bitcoin-cli failed with error: incorrect rpcuser or rpcpassword

When I run this command bitcoind -testnet -printtoconsole -rpcuser=123456 -rpcpassword=123456 After bitcoind is up. I run this on the same Ubuntu 17.10 bitcoin-cli -testnet -rpcuser=123456 -...
1
vote
1answer
171 views

Authentication and key distribution in bitcoin

After going through the bitcoin protocol documentation it is still unclear to me how the bitcoin client is authenticated. Where can I find an overview of what the client sends and receives on the wire ...
1
vote
1answer
300 views

ANXBTC.com / MTGOX v2 API “Authentication”

I've signed up with ANXBTC.com and I'm trying to learn the API (based off MTGOX v2 API): http://docs.anxv2.apiary.io/ In order to issue commands, there needs to be authentication. I have a "Rest-...
1
vote
1answer
729 views

BitFinex API call returns 400 bad request - “Could not find a key matching the given X-BFX-APIKEY”

I dont know what I'm doing wrong, but everytime I try send post request "https://api.bitfinex.com/v1/balances" or some else I got this answer "Could not find a key matching the given X-BFX-APIKEY". I ...
1
vote
0answers
109 views

Trying to figure out the two-part authentication process. Can anyone give direct instructions?

I'm using btc-e.com verification, in the Finances section. It supplies two key codes and has a square bar code to scan. I've set up my google account for two-part verification, and google is ALSO ...
0
votes
1answer
26 views

What should you set as rpcpassword and rpcusername in BitCoin?

Every example/tutorial looks the same: rpcpassword=<somehashofsomesort> and rpcusername=rpcuser They always use something like rpcuser, and some hash for the password. Why is it like this? ...
0
votes
1answer
420 views

Disabling GreenAddress 2FA ∵ Google Authenticator doesn't generate the correct OTPs for it

According to the section "I lost my two-factor/mobile/etc (email/OTP|Authenticator/etc), what can I do?" of the GreenAddress FAQ page, You should always have at least two two-factor options enabled....
0
votes
1answer
524 views

What parameters are used to calculate the challenge string during bitcoin mining (blockchain creation)?

How is the challenge string computed mathematically? What's preventing some node on the bitcoin network from broadcasting a challenge + proof to other nodes as it's own when it received it from some ...
0
votes
1answer
31 views

Beneficial proofs of work [duplicate]

I'm new to this community and a Bitcoin novice. I believe to have understood the concept and purpose of proof of work but also, that the high energy consumption of proofs of work is a major problem ...
0
votes
1answer
262 views

How do I reset my TFA token in Coinbase?

I would like to move my Coinbase Two-factor authentication token from one device to another. I cannot find a location on their website to disable TFA once it has been set up, or to move the token to ...
0
votes
1answer
110 views

How can I limit the mining to specifics miners authentified by private key or something like that?

I know how to code in C++, but I don't know really how all mining system works. I have my altcoin, and I would like to block reward blocks to miners which are not authentified (something by private ...
0
votes
1answer
393 views

How does one “authenticate” a bitcoin user?

What is the minimum standard for authenticating a bitcoin user. Would it be enough, for instance to verify that someone named "Tom Au" will answer to that name at this email address? Or are more ...
0
votes
2answers
33 views

Flatpak bitcoin-core not generating .cookie file

I'm using the version of Bitcoin-Qt 0.18.1 that comes with Flatpak. I've looked in the Bitcoin datadir, which is in ~/.var/app/org.bitcoincore.bitcoin-qt/data/ and there isn't any .cookie file there. ...
-1
votes
2answers
80 views

How in the Bitcoin world one prove that a public key is authentic?

I am trying to understand how Bitcoin works, and was wondering how can you prove that a public key is authentic. Here´s what I have in mind to provide more context to my question. Let's suppose I ...