Is there anything else where i dont
need the whole blockchain and
also gives me a deterministic seed?
The only other mainstream deterministic wallet is armory and that requires the whole blockchain. I used blockchain.info in the past and for newbies with small amounts it is ok. You just need to set a really good password. I'd like to see multibit-HD in action. That sounds like a good wallet to me. |
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I am new to crypto world and wonder if Bitcoin was always under governments pressure? as nowadays I can see that in many countries govs are concerned about the issue of Bitcoin and and its regulation (especially in USA). Is it temporary situation or permanent ?
My understanding is that bitcoin first got a government's attention last year when the Fincen guidelines came out. Ironically enough that gave a boost to prices. Since then it's come under increasing scrutiny from governments around the world. Lots of governments have weighed in with their opinion on bitcoin now. There is a site bitlegal that tracks bitcoin's legality in various sovereign countries around the world. |
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Ok try this: Find your electrum directory and create a backup of it just in case. Here is how you can find the directory: https://en.bitcoin.it/wiki/Electrum#Wallet_FileThen delete the blockchain_headers file in your electrum directory and run electrum. Wait for it to synchronize and then let us know if everything is ok. |
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Which address is yours? Do you see the address under receive tab > used (click on arrow next to "used")?
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You can see the roadmap here: https://bitcointalk.org/index.php?topic=427617.0Stealth addresses are not on the roadmap. AFAIK the stealth address specs haven't been finalized yet and that is stopping people from implementing them. This is a long journey. BIP38, multisig etc. have still not gotten widespread support after many years. HD wallets are just beginning to come out. |
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I'm having some pretty major usability issues, due to having a wallet with many transactions. It takes at least 30 minutes to sync now, even if I just disconnected. I use a "warm" portable electrum on a fresh OS for security reasons, but this solution is beginning to fail. I need my wallet to be accessible quickly.
Does this mean you don't have Electrum permanently installed on your PC? If that is the case then maybe Electrum is downloading the blockchain headers each time you run it and that is the reason for the delay. |
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1 block: 10.1 minutes
Diff just changed but this is the first time I have ever seen block generation north of the magic ten minute mark. Maybe good news for miners??
I saw a +50 min block last week - it do happen. There have been blocks that have been found seconds apart and there have been blocks that have been hours apart. The software tries to enforce an average of 10 minutes. It doesn't guarantee that every block will be found 10 minutes after the previous one. |
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The break in point for mining now is pretty well 1THs...anything less than that is a complete waste of time and money.
Is there any way to tell how long that will last or is it just a crapshoot? In other words, if I had a 1TH miner today it would still be profitable, but could this not be the case in say a month from now? It will changes because the difficulty will go up and more hash power is being added. Its hard to 'predict'. By the end of the summer your gonna want around 5THs. Damn! This seems like a real gamble as it is pretty much impossible to accurately predict a ROI. I'm new to all this but I'm thinking I will just build a rig with lower power nVidia cards for Scrypt mining since at least the computer can be used for other things and would hold some resale value. I guess Bitcoin mining will eventually just be done by gigantic mining farms then huh? nVidia cards are piss poor at mining. AMD is what everyone uses. At least do some basic research before you go spending money. |
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Right, well I guess that is one way to be "hardcore" but I think the point here i just to provide an initial random seed to an otherwise and deterministic procedure. It seeems to me that if you are taking hashes of random media (or, IMHO, just sampling from /dev/urandom) you should be fine. Am I missing anything crucial?
Well, you want as many different sources as possible since any amount of good or decent randomness gets mixed in to the final private key. Your camera, your picture, your file, is about as good as it gets. It's actually overkill, as you can use any of the apps or scripts I have mentioned above, as well as bitaddress.org I suggest taking a picture of your turds and using those. Turds tend to be very random. |
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I agree, for cold storage learn to use paper wallets, make multiple copies and hide at different locations.
For instance under your mattress. Maybe in the freezer cause it's called cold storage, right? |
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There are a few places and threads here:
1. using dice
2. using camera pointed at the sky
3. using random input from keyboard
As for the camera part, just use a brand new memory card, and take videos and pictures as you walk all over town of anything in any angle.
By the end of the day, you have thousands. Pick a few dozen as input, then hash the entire file to get your new "random" number.
I know how to calculate the sha256 hash of my files, but how am I going to get my private key and bitcoin address from it? bitaddress.org -> wallet details tab -> paste in sha256 hex. |
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There are 2^96 private keys to my address and I only hold 1 of them? However unlikely that someone else might find another one of them, this is a worrying thought.
It's OK. I have the others and I'll keep them safe for you  |
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If cpu temp, mouse input etc is what makes the seed, would it be less secure to use a new laptop for an offline installation than a several years old one?
Age of hardware doesn't matter as far as seed generation goes. Note that electrum's seed is just 128 bits. That is a very small amount and you can always generate that many random bits. So it's not something you should worry about: https://bitcointalk.org/index.php?topic=167276.msg1763759#msg1763759Age of hardware does matter as far as reliability goes. Older hardware tends to be less reliable, so take that into account as well. |
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In Dec-Jan 1 bitcoin was worth $1,000. Today it is worth ~$440. I don't think a chart is needed. Bitcoin has some of the qualities of money. But it lacks store of value and unit of account. Fungibility is also at risk because of the open nature of the blockchain. It makes blacklisting coins a distinct possibility.
Fiat is widely acknowledged as money and is a reasonable store of value. If you don't agree to that then that is your choice.
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It's neat... Like personal Bitcoin DNS. Very neat idea.
So when the op got 'price.bitwhatever.com' did he also get 'spend.bitwhatever.com'. That is, does this service respect the hierarchy or is it just string hashing the pseudo-urls. Also, I'd like to know if OP is an owner or intersted party in these services. The people behind bitcoin wallet paid 200k for the domain name. I don't know whether they are spending half as much on securing their site but I bet not. It's just another web wallet. The ONLY web wallet to survive so far is blockchain.info and that is because they are a) honest operators b) private keys are generated and encrypted client side. |
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So I was trying to discuss bitcoin with someone recently who is the "average joe". They think paper FED notes are "real money"  Why do you doubt this? Fiat has all the qualities of money. Store of value, medium of exchange, unit of account, fungible etc. It's all there. |
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Attacker?? You expect people to send their private keys off to someone expecting money. Instead the recipient of their email is just going to clean them out.
No, you are not sending them your private key! You are creating a private key for the purpose of that transaction, deriving a Bitcoin address from it, then sending only the funds you want to transfer to that newly created address. This is similar to the current payment process, where the recipient of the funds creates a new address to receive the funds - but it's the trusted sender that creates it, not the recipient. The recipient can not clean you out, they only have access to the funds you have attached to the image, nothing else. Better now? Ok this is just a whole lot of horse crap. I can only conclude that the OP is a scammer and he's got a lot of shill accounts supporting him in this. I am done with this thread. |
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The hash of the image is the key, so no, it's not encrypted. The recipient is not meant to leave the funds there indefinitely, I expect them to sweep them to their own wallets on receipt. And unless an attacker has access to your email and starts hashing all image attachments and checking the blockchain for a match, they would not even know you're sending (or receiving) money.
Attacker?? You expect people to send their private keys off to someone expecting money. Instead the recipient of their email is just going to clean them out. Also, if you're using this to store your own funds, it's similar to a brainwallet - that is not encrypted with anything either . Brain wallets are another bad idea. You are comparing your app to a known bad idea? |
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