Version 0.8.1 is out. Get it on Google Play or direct download- Adding 140 fiat currencies, 164 supported fiat currencies in total
- Choice of which exchange to use (Bitstamp/MtGox/weighted average)
- Expert Mode: This allows us to hide some of the more advanced stuff to make the wallet even easier to use for newcomers.
- Smooth and snappy swiping between balance and transaction history
- Got rid of one step/screen in the send wizard
- Transaction details now linking directly to blockchain.info
- Improved functionality for pasting amounts when sending coins
Enjoy |
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The Mycelium Bitcoin Wallet is a Bitcoin wallet for Android and the successor of BitcoinSpinner. It was initially announced in the BitcoinSpinner forum thread as an early beta. We have received a lot of great feedback over the months, which has allowed us to dramatically improve the wallet. It is now deployed on more than 2000 devices. Overview: - Sources available for review: https://github.com/mycelium-com/wallet
- 100% control over your private keys, they never leave your device unless you export them.
- No block chain download, installs and runs in seconds.
- Ultra fast connection to the Bitcoin network through our redundant super nodes.
- Designed for simplicity, but with unique advanced features in expert mode.
Features: - Cold storage spending: Spend directly from paper (demo)
- Import private keys using SIPA and mini private key format (Casascius private keys) from QR-codes or clipboard
- Export private keys as QR-codes, on clipboard, and directly to printer using external SD card (demo).
- Watch-only addresses
- Key control using Active and Archive key set.
- PIN protection
- Multiple Bitcoin denominations: BTC, mBTC, and uBTC
- View your balance in 164 fiat currencies
- Switch between Bitstamp, MtGox, or weighted average when getting BTC/fiat exchange rates
- Switch between BTC/fiat when sending coins
- Switch between BTC/fiat when making a payment request
- Address book for commonly used addresses
- Transaction history with full transaction details.
- Tor connections using Orbot with SOCKS proxy
- Integrated QR-code scanner
- Share your bitcoin address using Twitter, Facebook, email ...
...and more. apetersson and I have been working full time since April developing this wallet. We hope you like it and leave a 5 star review on Google Play. If you want to get early access to new releases please join the Google+ group Mycelium Beta TestersTL;DR Try out the Mycelium Bitcoin Wallet: Google Play or direct downloadThe sources are published here: https://github.com/mycelium-com/walletWe hope you like it and leave a 5 star review  EDIT: Release notes for version 1.3.3: v1.3.3 was released to Google Play store, github, and our site. The list of changes from last regular release include: * Generic scan button in the main view - Use this to quickly scan QR codes to send bitcoins. In the future, this may be used to quickly log into websites with BitID. * Improvements to barcode scanning with flashlight toggle and autofocus setting * Email notifications for LocalTrader - Google Push Notifications system is still kind of unreliable, and we can't fix it because it's Google servers that are having issues, so this is a fix until we figure out something better. * Fixes and connectivity fallback for dns issues - A few days ago we had an issue where our domain name, which is pointing to our servers, was temporarily turned off by our provider while they verified that we are who we say we are. Should this happen again, wallets will switch to contacting our servers with their IP numbers directly (this is also likely temporary, until we move everything to Tor) * Various crash fixes We think that this will be the last feature update for the non-HD version. Stay tuned for an upcoming Mycelium HD release. |
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There are currently several backup strategies:
1. No backup...
2. Export as QR-code...
3. Export private key to clipboard...
4. Export to SD card...
I would suggest adding a "share" option. Provided my understanding of it is correct, that should allow you to export the key to a particular application, rather than directly exposing it to all running applications like the clipboard option, or all programs with SD card access like the file option. Interesting idea. On Android there is a mechanism to share content with various apps based on content type. For instance you can click on your address on the main view and share it as text with various apps accepting text. To do that safely with key export (as a text or a JPG image) I would like to first have BIP 38 implemented (export with encryption) with an app generated secure passphrase. Something to look into going forward. |
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It just launched. Sign on and get verified to trade.
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Awesome! Sent my first 1 BTC. At Tier 1 I can only trade BCT/LTC. Waiting for my account to be upgraded to Tier 3 |
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Also, when more than one key is active, I think there should be some systematic way to determine which of them is the prime key in the main view. Currently the rule behind this seems to be somewhat arbitrary.
Thanks for your observations. The basic rule is that whatever key you select in Keys & Addresses, be it an active or archived key, is the one shown in the balance view. This way you have the following properties: 1. If the selected key is in the active key set (and aggregate mode is enabled in settings, which is the default), then the balance view will show the aggregate value of all your active keys, and the receiving address will be that of the selected key. 2. If the selected key is in the archive, then the balance view will show the value of this single key, which will also be the the receiving address. The UI is not very clear about this, and I have to find a way to make it very plain that this the way it works. One thing that helps a bit is that the balance view shows a yellowish message stating that you are observing an archived key if you have selected a key in the archive. |
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Hi,
What bitcoin wallet software allows cold wallets or offline transactions?
For starters, there is Armory that is specifically set up to do this.
And, those of you using the original or reference bitcoin-qt client can do raw transactions or you can import the blockchain to an offline machine and do the transaction there, then ...
I need one that can use vanity generated compressed keys.
The Mycelium Bitcoin Wallet for Android does this. Watch this video of the Cold Storage Spending feature: http://www.youtube.com/watch?v=1pDSzOiFgIkFor improved security take an old second hand Android device (>= Android 2.2), nuke it to factory defaults (maybe replace factory image with cyanogenmod), no SIM, and install nothing else than the wallet. You have turned a practically free old phone it into a single purpose hardware device. Forum announcement here. Hi Jan, I appreciate that and have been an old spinner user. However, I am wondering if this is designed as a personal wallet or can it handle a wallet with maybe 10,000 addresses? Why? Because I may have that many users or players in my site, and each one gets a unique address of course. The thing is that with the Cold Storage Spending feature the key you are spending from is only in the memory of the phone while you are spending. What you see in the video is a wizard where you: Scan-key/spend-from-key/wipe-key. This will work with as many keys as you can manage on paper. |
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Hi,
What bitcoin wallet software allows cold wallets or offline transactions?
For starters, there is Armory that is specifically set up to do this.
And, those of you using the original or reference bitcoin-qt client can do raw transactions or you can import the blockchain to an offline machine and do the transaction there, then ...
I need one that can use vanity generated compressed keys.
The Mycelium Bitcoin Wallet for Android does this. Watch this video of the Cold Storage Spending feature: http://www.youtube.com/watch?v=1pDSzOiFgIkFor improved security take an old second hand Android device (>= Android 2.2), nuke it to factory defaults (maybe replace factory image with cyanogenmod), no SIM, and install nothing else than the wallet. You have turned a practically free old phone it into a single purpose hardware device. Forum announcement here. |
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We have the best Bitcoin Economist in the world working on how to handle exchange rates in Mycelium Bitcoin Wallet  The best way to handle it is to give users options. However the default should be Bitstamp spot price, it's closer to the real Bitcoin exchange rate. Right now the exchange rate features are pretty much unusable since the Gox rate is almost useless (imo). This should be #1 priority. Otherwise it's a brilliant wallet. Peter Surda is working on exactly that. Basically we will give the user a choice of what exchange to use, and we will simulate a 1 BTC buy order and 1 BTC sell order of the currency with highest volume and take the average of those two numbers. From there we will use official daily exchange rates to convert between currencies... or something like that. Once we have it working we will describe in painful details exactly how this is done. |
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I haven't thought this through, but would it make sense to include fiat amounts in the transaction history? I mean the actual historical worth, not the based-on-today's-exchange-rates worth. If you are already storing transaction data locally, adding this field would be trivial. If you are pulling the list from the server based on address(es), it might be too much work.
This. And more currencies please. $$ are of no use where I and 90% of humanity live. What, our drug money is suddenly not good enough for you???  We are going to add ARS to the list of supported currencies (Argentinean pesos). That's the one for you as far as I remember gizmo. In general we will add add the currencies we can get official conversion rates for. They may not all come overnight though. |
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I haven't thought this through, but would it make sense to include fiat amounts in the transaction history? I mean the actual historical worth, not the based-on-today's-exchange-rates worth. If you are already storing transaction data locally, adding this field would be trivial. If you are pulling the list from the server based on address(es), it might be too much work.
Unfortunately it is not trivial to do this. Since you can import any key you like and show its transaction history we will have to have historical conversion rates at our fingertips. Right now the backend system does not have that. This may change going forward, but making this happen may be more work than what it is worth. Right now at least we have many features that take precedence. |
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I just read through the FAQ. Kudos to blockgenesis. I couldn't have done it any better.
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Version 0.7.5 has been released. The over all theme for this release has been anonymity and improvements that make it easier to do p2p exchange. Changes from version 0.7.3: - Improved send wizard: You can now enter receiver and amount in any order, and you can review the receiver right after scanning. Also, if your clipboard contains a valid formatted amount of decimal dotted BTC amount (e.g. 1.23456789) you can paste it when specifying the amount
- Support for SOCKS proxy: This allows you to connect through Tor using Orbot or any other gateway, for those who wish improved anonymity. (I think Andreas will make a video that shows how)
- Fading QR code for improved readability in low-light scenarios. Yes, it really helps a lot especially on tablets and devices with poor camera
- Manual address entry for desperate people
- Support for freshly mined coins: Previously Mycelium let you create transactions with freshly mined coins, making transactions take up to about 16 hours to confirm. Now it does not include freshly mined coins in your spendable coins. This only affects you if you mine directly to a Mycelium managed address
- Bugfix to update the balance: If you went into settings and changed between Aggregated/Segregated view the balance was sometimes not updated when you went back to the balance view
- Cold storage spending wizard does no longer require PIN if you have it configured
With these changes it should now be easier to make p2p exchanges as you can: - Enter the amount to send (the interesting part) before the address, which is just a means to an end.
- Pasting the amount that you have just calculated on an external calculator while bargaining.
- Manual address entry for those occasions where the buyer just has a paper slip.
Version 0.7.4 was only released in the beta channel. Version 0.7.5 contains minor fixes on top of 0.7.4. As always it may take a few hours before you can get it from Google Play. It is also available for direct download. Theme for the next release will most likely be sexing up the UI for the 1.0 release. On top of that we are working on letting you choose which exchange to get your rates from. Enjoy |
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If you pull mtgox ticker data from their API you may look at old data. It seems that when MtGox switched over to use AKAMAI for their web-fontend-cache the by accident also made akamai serve cached trade data. The results you get by fetching: https://data.mtgox.com/api/1/BTCEUR/public/tickerMay be very different for what you get without HTTPS (http vs https): http://data.mtgox.com/api/1/BTCEUR/public/tickerI noticed that one of my servers was using data back from August 20! The results vary depending on which host you are using. You get various old sets depending on which DNS records your host has. On one host data.mtgos.com maps to e7476.b.akamaiedge.net while on another it maps to a23-53-216-44.deploy.static.akamaitechnologies.com, etc... It seems that http is not cached. |
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If the Mycelium wallet had this functionality as a payable pro feature how much would you be willing to pay for it?
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short feedback and improvement request:
spending directly from cold storage (paper wallet) to an arbitrary address is cool. I just used it to spend/"unload" some bitcoin vouchers.
But it makes no sense that mycelium asks for the PIN in this case, because I spend from an unencrypted private key anyway, so there is nothing to be protected (unlike the scenario of spending from app's priv key).
Hence the suggestion/request that mycelium shall NEVER ask for a PIN when spending from cold storage.
That makes a lot of sense. You got it. |
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The thing is that many people think that their password is safe as they use something of similar size/complexity on web-sites. However, on a web-site the attacker cannot really brute force it until he has access to the encrypted password file or a hash of the password (maybe with some seed). Without this the hacker is left with a few attempts a second (through the web-page login), with the risk of locking the account he tries to gain access to. With brainwallets the attacker can start brute forcing with trillions of attempts a second just by looking at the blockchain. (or in the case of a paper backup, once he has access to the encrypted private key).
I really want Mycelium users to use safe and verifiable mechanisms that do not lure them into using something that they think is safe while it is not.
So how about if we convert the attack on the blockchain into an attack on a website instead. We can do it by adding a protocol to the client to save the strong key, encrypted with the human password, on S3 Amazon cloud or Dropbox or something. Only the strong key shows up on the blockchain and an attacker would have to dig up the user Dropbox account before conducting a dictionary attack. The unencrypted strong key never leaves Mycelium. If I get you right you suggest that the private key is encrypted with a human generated (potentially weak) password. The encrypted private key is stored on dropbox. Access to dropbox is with a different human generated (potentially weak, or the same) password. This would make you vulnerable to an insider attack at dropbox, or one of their historical hacks. Yes, you got me right. Of course it's a ton better than putting a human password on the blockchain subject to mass dictionary attack sweeps. I thought that was the point of the snippet of yours that I quoted. I know you feel security should be only hard keys on paper never seeing the network. However, there are many people who just want the same level of security one gets with bank accounts with a few hundred dollars allowing online payments. It's just too hard today to get my friends to use clients with locked in keys that can only be extracted unsafely or with elaborate precautions. We are trying to make export as safe as possible, but you are right: Who would jump through a lot of hoops to secure a small sum for spending? There are currently several backup strategies: 1. No backup - It is like a pair of pants, if you wash them the money is gone 2. Export as QR-code - The QR code is displayed, you take a picture with a secondary camera. This is very easy and as safe as your camera. 3. Export private key to clipboard - From there you can put it anywhere you like. You have to trust any other apps on your phone not to grab it, or use a dedicated device. 4. Export to SD card - This allows you to print it out directly from a SD card enabled printer with no computer in between. You have to trust any other apps on your phone not to grab it, or use a dedicated device. I would use 1 if I had just a few dollars, and 2 if I only used it for small sums, and didn't want to bother with a dedicated device. Option 3 and 4 I would use for large sums and with a dedicated device. Maybe option 2 would be suitable for your friends. Personally I use option 4. |
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A picture is worth a thousand words  |
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The Sound of NEFTIn the window of my office I have an empty barrel of black NEFT. Twice a day it makes a clicking sound, in the morning when it heats up, and in the evening when it cools down. It is the bottom of the barrel that makes the sound when the pressure goes up and down. (You need to keep the lid on and closed tightly). The barrel I have has a small dent close to the bottom, so I don't know if this happens with all barrels. This is the NEFT sound!Whenever I hear it I think about NEFT Crazy idea for marketing? Even before I got to the bottom of your post, I was thinking exactly the same thing. As far as I know, that has never been done before. Let me ask you this: At the end of the day, do you salivate like Pavlov's dog each time you hear the ring? There's a Super Bowl commercial in that idea somewhere. A slogan comes to mind (the following is complete and is NOT asking a question): Neft: Sounds Like. Purposely, left incomplete because the sound (used a double entendre) means different things to different people, couple with the tone probably isn't the same due to unknown factors, especially if there's liquid in the container. Genius! Yeah, I feel a bit like participating in the dog experiment. Two problems: 1. I am giving the only barrel I have left as a present Saturday (Maybe getting a shipment Friday or Saturday, so I am gambling here) 2. The first click is too early in the morning for me to have a shot (depending on weather, in particular direct sun) |
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