here you can find a public challenge aimed to brute force a brain wallet private key, derived from 8 char long [a-zA-Z0-9] passphrase with a salt of “a@b.c”. Is it possible to adapt an hashing […]

I’m trying to implement paginations using : https://chainquery.com/Bitcoin-api/listtransactions I want to have reverse listing (oldest first), so I need to get total number of transaction returned by listtransactions call. I know that getwalletinfo returns number […]

I’m curious about the development of application of Identity management in Blockchain platform, but I’m a bit confused about the technologies to use. In short words, when is more convenient to develop an application coding […]

Is it possible to keep many currencies (Bitcoin, Monero…) on one USB drive? If not, how can I setup USB Cold Storage for Bitcoin and Monero?

We have a ATM Network and we want to sell and buy BTC or ETH on our ATMs, using our own switch. How can we do it?

79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 seems very random to me. I see how this point is on the curve, but how exactly was this specific point chosen to be the base point? Could other base points have worked?

I’m currently doing a research on Bitcoin and I would like to know if there is anyway to replicate double spending in the testnet or regtest? If isn’t possible is there any other type of […]

I’m trying to create a BTC transaction with one input and two outputs, one for change and one OP_RETURN to anchor data. And I’m doing all of that on my regtest backend. The raw unsigned […]

Two questions: I am confused by the term: trading partners like BTC/ETH, etc. I’m into some more of the fringe currencies, IOTA, and SAN. Bought them with Bitcoin on bitfinex, how to convert back? Seems […]