Topic: ANN: [OPAL] | POS | Secure Messaging |NO ICO | bitsquare.io | cryptopia | Yobit - page 67. (Read 383418 times)

https://soundcloud.com/supernetradio/colored-coins-explained-by-dev

Opal [ANN] translated into french and topic started on bitcointalk: https://bitcointalksearch.org/topic/m.10333612

How to mine Opal translation in french added to https://bitcointalksearch.org/topic/m.10333612

Gemlock DNS checking translated into french and added to https://bitcointalksearch.org/topic/m.10333612

"Opalcoin community page" created on Facebook: https://www.facebook.com/opalcommunity

there is an IPV6 connection on port 50990 which fails.
Ok, next time, try to disable IPV6 connections, just to test.
Close your wallets.

Right click your connection at the bottom left of your desktop.
Click Open the Network and Sharing Center
Click View network connections:

Right-click the connection that you use, and then click Properties. (Administrator permission required), confirm.
Click the Networking tab. Uncheck Internet Protocol Version 6 (TCP/IPv6) then click OK and validate parameters before quit if asked.

wait 30 seconds.
Open your wallet

done.
and crashed again.

thanks for trying to help, but i can't spend any more time on this, i'll have to check back in the future.

Yes, just open a notepad and type:

Then "save as" opalcoin.conf (beware not to save as opalcoin.conf.txt)
cut/paste it into C:\Users\Yourname\Appdata\Roaming\Opalcoin
and test again please.

qt connects and syncs perfectly well before crashing, so i haven't added opalcoin.conf, and there's not one there by default. should i try adding one?

in C:\Users\Yourname\Appdata\Roaming\Opalcoin
did you have a opalcoin.conf file which contains the nodes below when you edit it ?

I downloaded the new wallet a few days ago. It's the only OPAL wallet i've installed. It opened, synced fully, received coins, all seemed good. When I unlocked for staking it crashed. It has done this every time since, and most recently it has begun crashing even without the wallet being unlocked.
I'll try deleting all but wallet.dat in roaming now, then hope it will run for long enough to resync. Will report back.

Edit: deleted everything in roaming, reopened wallet, it synced for a few mins then crashed as before.

Edit 2: restored fully synced roaming files. launched qt. crashed again. this time i was able to access debug.log - don't know if this might prove helpful?

getblocks 135028 to 00000000000000000000 limit 500
getblocks stopping at limit 135527 6ba5141ae2743f58d930

******* exception encountered *******
trying connection [2001:41d0:8:6107::]:50990 lastseen=4.3hrs
connection timeout

Hello Mineotaur, when did the issue occurs ?
-just after downloading the new wallet ?
-with the old wallet ?

did you try to do a fresh install like RCan06 posted: https://bitcointalksearch.org/topic/m.10296855
if you are aware with Windows 7: you can try to check your last download: https://bitcointalksearch.org/topic/m.10320069

When I unlock the wallet for staking, within a few seconds maybe a minute, this happens every time. Windows 7.



Edit: Well it used to be that it'd only crash when unlocked for staking, but moments ago the same has happened, this time the wallet was still locked.

With all tutorial done its time to push PR  You give a nice infrastructure, its more user friendly now  !

This is going big  


Great work guys

I didnt even know gemlock was already in.
This all looks very cool, might put an extra order if i can.

Gemlock is a decisive tools in our security roadmap, soon, Opal user will check, directly inside his wallet if this one is the good one (the last and certified one) and if it is not corrupted !

How it works ?
by comparing the SHA1 checksums of your Opal wallet and the official Opal wallet.

Does it work ?
yes, but it is not yet automated.

Let's get checking our last wallet, (here is the tuto):

For WINDOWS users:

1. Go to C: create a new folder and name it FCIV
2. Download the File Checksum Integrity verifier : http://download.microsoft.com/download/c/f/4/cf454ae0-a4bb-4123-8333-a1b6737712f7/Windows-KB841290-x86-ENU.exe
3. In the file download box, click Save and save the file in the FCIV folder
4. Go to your FCIV folder and double-click on Windows-KB841290-x86-ENU.exe  then click ok
5. Click ok to extract the file (if asked, extract the file in the FCIV folder)

6. Click start, on the search field type Press enter, then click cmd.exe
7. On this black command prompt, type Press Enter

8. Download your favorite wallet on www.opal-coin.com at the Download Wallets  
9. Type (and replace the .zip file with the wallet you downloaded, as there are 3 different wallets).
the SHA1 checksum is the 40 numbers and letters, after File Checksum Integrity Verifier version 2.05,
example: 4c56186623bbaa7c2fea980b042270beafd3b53f c:\the full path\where you downloaded\Opalcoin-Qt-exchange.zip

10. Now, type:
And press Enter
it will displays your DNS sometime we encounter surprise here so you can check if they are yours, or if you have a box: if they are those of your ISP, type "Your ISP name DNS" in google to know them, and... anyway we need to type it

10. Type: Press Enter

11. Type: Press Enter
This order displays the genuine Opalcoin SHA1 checksums (the 40 numbers and letters).

12. Compare this guenuine SHA1 with the checksum fciv.exe gave you: they MUST be the same.
(beware to check the SHA1 of the good wallet as there are three Opalcoin client, to check it, just look at the name of your Opalcoin-Qt-Folder. Now in the command prompt look at the one which match with your Opalcoin-Qt)

 If the SHA1s are not the same: Close your wallet, save the wallet.dat in a easy retrievable folder (but not into your Opalcoin-Qt folder and not into C:\Users\YourUserName\Appdata\Roaming\Opalcoin), go to C:\Users\YourUserName\Appdata\Roaming\ and delete the folder Opalcoin, go to your Opalcoin-Qt folder you use to launch your wallet, delete the Opalcoin-Qt folder.

Type:
Press Enter to quit the nslookup utility.

Go to www.opal-coin.com and click wallet download, choose the walllet you need.
Now it is simple and cool, if you want to test again your last download from this simili-trusted pseudo-true opal-coin.com  (maybe you were not on the right official website )

Type (and replace the .zip file with the wallet you downloaded, as there are 3 different wallets)
Enter, check.

If the SHA1s are the same: Well done you have a certified official Opal wallet !
 
You can now run it, let it sync, (1 to several hours, depends on your bandwidth) and close it.
Go to C:\Users\YourUserName\Appdata\Roaming\Opalcoin
and put your saved wallet.dat into the folder. now start again your wallet: and stake cool !

For LINUX users:

1. Start a shell / terminal, i.e. a text based command line utility

2. Go to the directory to which you downloaded the wallet software by typing the following command to the terminal, followed by enter, replacing “ /path/to/download folder ” by the actual location of the folder where you downloaded the wallet software. cd “ /path/to/download folder ”.

3. Type the following command to the terminal window, followed by enter, replacing “ Opal-Qt-opaque.zip ” with the name of the file you downloaded: sha1sum Opal-Qt-opaque.zip The sha1sum command outputs a line similar to this: 3a099ff6e8831885b00431bee693ea40b3ff9e39 Opal-Qt-opaque.zip Take note of the random-looking 40 character string. It is the SHA1 checksum of the file you have downloaded. Now compare it to the checksum provided by the DNS system at step 7.

4. Start the DNS lookup utility by typing the below command, followed by enter: nslookup

5. At the nslookup utility prompt (>), type the below command, followed by enter: set querytype=TXT

6. Make a DNS query by typing the address provided by the wallet developers to the nslookup utility prompt, followed by enter: checksums.opal-coin.com You can also use DNS checksum service provided by a trusted third party, such as Altcoin.Center: opal.signatures.altcoin.center Take note of the 40 character SHA1 checksums returned by the above command: checksums.opal-coin.com text = "Opal-Qt-opaque.zip 3a099ff6e8831885b00431bee693ea40b3ff9e39"

7. Compare the SHA1 checksum created at step 3 to the one provided for the same file by the DNS service at step 6. If the 40 characters checksums are identical, it means the wallet software file you downloaded is genuine. If the checksums are different, make sure the version of the wallet software you have downloaded is the latest one, and repeat all of the above steps. If the checksums provided by the DNS remain different after couple of hours have passed, please contact the Opal developers for advice


APPLE users, we cant forget you, i am just a little bit completly rusty with Apple file managment and prompts, so it takes me times... Camargh !

1. Open a Terminal (located in: /Applications/Utilities).
2. InsideTerminal prompt, type:
Press Enter

It dipslays the SHA1 checksum you will have to compare: 40 numbers and letters, here in red:
SHA1(/Your_full/path_to_file/Opaque-Final-Mac.zip) =3eb807b340d4e57aa79bb5422b94d556888bba60
with the SHA1 checksum of the official and certified opal wallets in the nslookup utility:

3.Type Press Enter

4. After (>) type  Press Enter

5. Type:
Press Enter

6. Compare the SHA1 checksum returned (still 40 numbers and letters), here in red with your wallet checksum, above:
something like: checksums.opal-coin.com text = "Opaque-Final-Mac.zip 3eb807b340d4e57aa79bb5422b94d556888bba60"

7.Type:
Press Enter to quit the nslookup utility.

If SHA1 checksums are the same, it means the wallet software file you downloaded is genuine. If the checksums are different, close your wallet, save the wallet.dat in another well known folder. then uninstall your Opalcoin-QT and download the latest version at www.opal-coin.com

Obviously, you can now quickly check your brand new latest download:
in the terminal type:
 Press Enter and compare with the Opaque-Final-Mac.zip checksum of your last nslookup. if it is still different, call a developper on IRC.

If the SHA1s are the same: Well done you have a certified official Opal wallet !


The next step into security is to automate these processes, stay tuned ...

(P.S: thanks to Jyri from altcoin.center for the linux tutorial)
(P.S #2: the checksums written here are not real, these are just example)

Alright, let me share my Opal piece, hopefully we can get some momentum, and that coin is looking pretty damn fine!


 
   Mid October 2014, during a time when uncertainty clouded the air, BTCitcoin was falling, and scam ICO's were the new alt-coin fad with seemingly multiple created daily.
Amidst all this I found a relatively new, non ICO, premine free, fairly distributed coin by the name of OPAL. OPAL was young, but as the name suggests, it was a shiny gem in a sea of despair.

  I first noticed the time put into the nice graphical work, including the logo, headers, and those sweet video clips that were being released. (are we going to get a full video!?! )
The Road-map was looking great at the time, and despite its young age, the developers had been putting in work and creating a good track record. The future, if followed, looked pretty damn promising, and I had a strong vibe the developers took pride in their work.

So I decided to give alt-coins another shot, putting my trust in the Opalcoin team to follow through.
A few months later, I can now say that what is occurring has exceeded my expectations.

   Opal keeps me excited about developments, I have been here long enough to realize that the road map is not followed step by step, and that is because Opal is FULL of surprises. Supernet, Opal drive, working w/ Altcoin.center, f-secure, coloured coins, these are developments the team surprises us with constantly, going beyond the road map which was available when I first invested.

   After following the thread for a little while, I deiced to enter the IRC chat, not expecting too much, since I've entered IRC chats before and you can almost hear your text echo in the empty room. Opal's IRC was much different. I was accepted into discussion by those present at the time in the room full of people (Developers and community members) and ended up spending hours chatting with people that day.

   Which leads me to the community here. Coins form communities, that's something else I find cool and unique about the alt-coin scene, but many communities can be full of hostile people, nonsensical fudders, and complainers. In my opinion the community can make or break a coin. Our community is great and building,  the IRC is top notch, and this thread is full of members taking the time to help new comers to OPAL, create cool opal pictures, write faqs, talk positively with each other, and encourage progress. EDIT: and create a damn OPAL EMBASSY at that ha!.

  That's something pretty unique in alt coin scene, when you form a community which actually backs and supports the coin and developers.  I believe a lot of investors need to realize we should not all sit back and watch the developers work for free (no ico/premine), we ALL have to contribute. (I like to think of it as investing in my investment) OPAL has such a good community with members who step up, and that encourages me to step up and put my free time into helping out as well. Especially so, when I see such development taking place.

  Without babbling too long, OPAL to me, was a refreshing change which kept me hooked during a time when I was doubting the alt-coin scene, during a time when I was tired of seeing scam after scam drain people of their wealth. From what I have seen in 3.5 months, Opal has gone above and beyond what was first planned, and I know to expect the unexpected. OPAL keeps me excited for the future of Crypto-currency, and what can actually be done with this new technology in the hands of the right people.

The future for us is bright my fellow OPALITES.

I hope to see a string of posts from other members here, I think this is a cool idea, and I know others here share the Opal love,
Cheers

Anonymized Credit Card Data Really Isn't Very Anonymous

Credit card companies often strip your details from their records and then share it with third parties, claiming that it's anonymized. But a new study from MIT reveals that analysis of just four purchases made on your card can identify you with more than 90 percent accuracy, even when your details are removed.

The study used data from three months of credit card transaction made by 1.1 million people. The researchers analyzed the transactions by time and location to pin-point who might be making them, and found then used a small number of known purchase details to work out who, from the pool of over 1 million people, made them.

One result shows purchases being made in a bakery one day and a restaurant the other. The team found just one person that could have made the purchases, "and we now know all of his other transactions, such as the fact that he went shopping for shoes and groceries on 23 September, and how much he spent," they explain to Associated Press.

The team found that they only need four purchases to identify an individual on the anonymizied credit card records, or three purchases if the prices are known. The study also revealed that it's easier to identify women using the technique, though the researchers can't yet explain why.

The study goes to show that a sense of privacy though anonymized data is somewhat of an illusion. Even without any of our details to identify us, all it takes is careful use of metadata—in this case, our shop visits—to identify us completely. Gulp.

source: Jamie Condliffe
MIT study: http://www.sciencemag.org/content/347/6221/536.full

Any solution ?

Opal Opaque addresses:

Contrary to classical Bitcoin where each transaction is publicly visible,  Opaque addresses are special addresses that forbid third parties to see any payments sent to that addresses. Opaque addresse is created easily with 3 clicks inside your wallet: clicking on "Receive" and "New Address" then checking the "Opaque Address" box which pops. Any payment sent to this address create its own unique one-time code that is added to the record of the transaction in the blockchain. Creating then a unique relationship between the sender and the receiver. This allows the sender to see the transaction it had with the receiver (and check if that transaction was done) and NOBODY else can see payments sent to your stealth address.

Wow!  Great stuff, will be sure to checkout if i'm ever around france

By the way we speak about brick & mortar stuff,

I am proud to announce the first Opal Embassy: located in Marseille, France.


spring is comin' (at least in Marseille), be kind, the embassy is open, but still under construction/beta

Here you will find all that you need to:

-Learn about cryptocurrencies, (and masterize Opal features: Opaque addresses, colored coins, Opal projects...)

-Buy & sell opal coin

-Mine Opal with O-pool

-Buy artwork with opal coin

-Buy opal t-shirts with opal coin

-Repair broken computers

-Have a coffee (5 opals)

-and more, as time goes by...

Opal Embassy - France
8, Rue Delille, Marseille
         - 13001 -

---

Come on guys ! It is History in progress

Those look great man, will pre-order.

Great job RCan.


Fixed. (For future reference, the wallets are always available from the download section on the opal website)

Regards,