With my PC wallet I got a 12 word seed mnemonic that I was able to write down. With the android wallet they do not let me get a private key at all. They allow me to back up on the wallet or externally but I don't see any private key or 12 word seed mnemonic in the file. What if I lose my phone or its damaged? Please help.

we need all bitcoin transactions in real time (unconfirmed transactions) and there fee to miner

We need to monitor / intercept / inspect all bitcoin transactions that are being sent to certain rather small but ever changing list of Bitcoin addresses. Basically, we just need to run a custom code in the event of any new transaction being sent through Bitcoin P2P Network. What would be a reasonable technical approach to accomplish that task? Thanks!

What is the best way for a curious developer to learn how to create their own version of bitcoin?

Every Bitcoin block has a HEADER which is a small fixed size data structure. What is Bitcoin Block Header SIZE in bytes?

I am using a mobile Bitcoin Wallet app by Andreas Schildbach. Now I need to restore my wallet because I have lost my phone. I am lucky that I have made backup of my wallet earlier. However I cannot figure out how to do a wallet restore. Please advice!

Hello friends, I have recently downloaded electrum lite wallet for my tablet but I am have no idea as to how I can synchronize it to my electrum wallet that already installed in my PC. Can any of you help in this...

Need to create an iOS app that would implement client-side Bitcoin Wallet. In Android, we would use BitcoinJ library. Is there any library for iOS similar to BitcoinJ? Objective-C or Swift? Thanks!

Why blank">Trustonic? Because it has suddenly become a TEE market leader and it is pre-loaded on about blank">400 million of Android phones which is about 25% of Android mobile phones in use (estimated as of Mar 2015) Many of the Android Bitcoin Wallet apps are based on blank">BitcoinJ Java library by Mike Hearn. Lets use collective intelligence to BRAINSTORM how blank">Trusted Execution Environment (TEE) from Trustonic could be used to protec

Bitcoin ecosystem needs robust server side HSM (blank">Hardware Security Module) implementation guide. Let's use our collective intelligence and brainstorm here some of the existing HSM vendors (blank">Thales, Safenet, etc) and see how (and if) they could be used to secure server-side Bitcoin wallets. I am announcing $100 Bitcoin bounty pool of "beer-money" (see the green banner above) to give it more visibility at BitExperts Home Page and enco