[SDC] ShadowCash | Welcome to the UMBRA

[drAGon925]

Looks like this coin is gonna skyrocket.

It's better to buy some just now...

I can confirm skyrocket of the price.
It is very low, the flight will be fast and long, fasten your seatbelts!

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[robboman]

Awesome great work dev team! Will update now 

[Automatic Monkey]

Just read the white paper- heavy stuff, like my senior physics courses except I could understand those!  

Good thing the mandatory upgrade is being done now. That can be a real cluster-F once a coin is being used for commerce, by unsophisticated users. Can you even imagine a mandatory BTC upgrade now?

The only thing that seems a little shaky is the difference between Shadow and SDC. So it's like we will have two separate currencies in the wallet? Will this be transparent to the user, or will we have to mess around with it?

One unrelated idea I had about anonymity was to add a random element to the transaction fee, like instead of it being 0.2% it could be anywhere from 0.180000% to 0.220000%. That way there would be no way to match a wallet credit to a wallet debit with any certainty.  

[illodin]

Tree for exchanges to build the daemon: https://github.com/SDCDev/shadowcoin/tree/anon


https://github.com/SDCDev/shadowcoin/commit/94bfb03903d5fadfc7e975fa0ace749187279703

That's enough to verify, but not to spend.

To those skeptical... ^ this.

Is that enough to verify no coins can be made out of thin air?

@yourstruly, can you comment on that if you've had enough time to take a look at the code?

[deliveryman]

I would suggest to name shadow/sdc in frontend very simple and userfriendly. for an example:

- send Anonymous
- send normal

This is easier to understand. For the real tech savvys can read the whitepaper. Its all about userfriendly

Great job! Love the whitepaper !

[ffmad]

Tree for exchanges to build the daemon: https://github.com/SDCDev/shadowcoin/tree/anon


https://github.com/SDCDev/shadowcoin/commit/94bfb03903d5fadfc7e975fa0ace749187279703

That's enough to verify, but not to spend.

To those skeptical... ^ this.

Is that enough to verify no coins can be made out of thin air?

@yourstruly, can you comment on that if you've had enough time to take a look at the code?

it was tested by a lot of people on Testnet during 1 month

don't worry about that

[deliveryman]

saw this on reddit. lets upvote this for awarenes

http://www.reddit.com/r/Bitcoin/comments/2pgbfs/an_epic_moment_in_cryptocurrency_history_zero/

[child_harold]

Hi all

After much planning and development, we are proud to bring you our latest release.  Many of you have been involved in the testing process, and we are very thankful for all the help that has gone into this release.

The main feature in this release is ShadowSend v2, but here's a list of other improvements we've made during the development cycle:

• Anonymous transactions using zero-knowledge proofs
• Multiblock download (Thin and Full Modes)
• ShadowChat now shows unread message count instead of total message count
• Ring size suggestion for Shadow spend transactions
• HTML options page
• Transaction type display selection
• Notification type selection
• Enable/Disable Thin Mode from options

We thank you all for your patience as well, and without this community, this release would have never been possible.

Without further ado, here is our WP:
ShadowCash: Zero-knowledge Anonymous Distributed E-Cash via Traceable Ring Signatures


Anonymous ZK transactions will only work from block 257000 onwards, as to prevent too many forks in the chain.

This is a mandatory upgrade, so please make sure you are on v1.3.0.5 before the weekend.

OMG!

The Blockchain just got a WHOLE lot better!
"What a long, strange trip it's been"

This is the Dream. This is what Satoshi wanted. This is the Dream

THX RYNO + TECHOVERT: YOU GUYS JUST CHANGED THE GAME!



\o/

[Cornett]

LOL. This is like a Holy Grail
+1

[LucyLovesCrypto]

Anyone want to buy SDC off the market?

I want to sell a lot of it quickly but would prefer not to crash the price. Currently there is not much buy support on Bittrex.

Send me a PM if interested

[Alty]

Cloak had anon that was initially believed to be trustless until it became evident that a posa tx could be decrypted / hacked by a bad wallet (although very difficult to do so) to reveal sensitive data. It took many weeks after testing for that to surface.

Now SDC is doing something different and very clever. It seems SDC is using a purely blockchain based process for issuing / destruction / redemption of Shadow and on that basis, if correct, makes the unforgeability very strong indeed.

From whitepaper.

Shadow can be minted, which will destroy SDC
(ShadowCash), and will output a group of Shadow tokens totaling the same value
(minus the transaction fee) of the destroyed SDC.

The obvious weakpoints in SDC anon, if there are any, as pointed out before by people raising questions would have to be the risk of cheating the system for gain.

What would seal the deal in SDC is:

Irrefutable proof that there is no possibility to hack the wallet to allow minting of shadow tokens without destroying SDC of same value.
 

[LucyLovesCrypto]

Cloak had anon that was initially believed to be trustless until it became evident that a posa tx could be decrypted / hacked by a bad wallet (although very difficult to do so) to reveal sensitive data. It took many weeks after testing for that to surface.

Now SDC is doing something different and very clever. It seems SDC is using a purely blockchain based process for issuing / destruction / redemption of Shadow and on that basis, if correct, makes the unforgeability very strong indeed.

From whitepaper.

Shadow can be minted, which will destroy SDC
(ShadowCash), and will output a group of Shadow tokens totaling the same value
(minus the transaction fee) of the destroyed SDC.

The obvious weakpoints in SDC anon, if there are any, as pointed out before by people raising questions would have to be the risk of cheating the system for gain.

What would seal the deal in SDC is:

Irrefutable proof that there is no possibility to hack the wallet to allow minting of shadow tokens without destroying SDC of same value.
 

This is my concern as well. I plan on dumping all of my SDC quickly because of this fear (before we hit block 257,000) but will come back and buy more once I am confident in the safety of the code.

Things could be great but block 257,000 and forcing a mandatory upgrade by this weekend is way too fast. We need more time and eyes to bug test the code

[zuyfg888]

Cloak had anon that was initially believed to be trustless until it became evident that a posa tx could be decrypted / hacked by a bad wallet (although very difficult to do so) to reveal sensitive data. It took many weeks after testing for that to surface.

Now SDC is doing something different and very clever. It seems SDC is using a purely blockchain based process for issuing / destruction / redemption of Shadow and on that basis, if correct, makes the unforgeability very strong indeed.

From whitepaper.

Shadow can be minted, which will destroy SDC
(ShadowCash), and will output a group of Shadow tokens totaling the same value
(minus the transaction fee) of the destroyed SDC.

The obvious weakpoints in SDC anon, if there are any, as pointed out before by people raising questions would have to be the risk of cheating the system for gain.

What would seal the deal in SDC is:

Irrefutable proof that there is no possibility to hack the wallet to allow minting of shadow tokens without destroying SDC of same value.
 

This is my concern as well. I plan on dumping all of my SDC quickly because of this fear (before we hit block 257,000) but will come back and buy more once I am confident in the safety of the code.

Things could be great but block 257,000 and forcing a mandatory upgrade by this weekend is way too fast. We need more time and eyes to bug test the code

why?We tested 2 rounds,I'm sure we will all goes well, we should enjoy the happiness of Christmas.

[rynomster]

Its pretty straight forward.

CTransaction::CheckAnonInputs in main.cpp first checks the key image against the blockchain, if the keyImage doesn't exist in the blockchain, the signatures are verified.

Most of the checks and validations are done in main.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/main.cpp) and ringsig.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/ringsig.cpp)

We committed the verification code, so that people can go through it

I think its healthy to discuss this, together we can all come up with the way forward.

[Alty]

Its pretty straight forward.

CTransaction::CheckAnonInputs in main.cpp first checks the key image against the blockchain, if the keyImage doesn't exist in the blockchain, the signatures are verified.

Most of the checks and validations are done in main.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/main.cpp) and ringsig.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/ringsig.cpp)

We committed the verification code, so that people can go through it

I think its healthy to discuss this, together we can all come up with the way forward.

Thanks for some extra clarification!

[dgmon]

I am confused.  Is the present ShadowCash release opensource, or not?

[dasource]

I am confused.  Is the present ShadowCash release opensource, or not?

We've committed the verification code for exchanges: https://github.com/SDCDev/shadowcoin/tree/anon
Its enough to build the daemon, and it will be able to accept and verify anonymous transcations.

We've left the spend code out for now, as we wan't to give investors a chance to have something unique.

<snip>
Most of the checks and validations are done in main.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/main.cpp) and ringsig.cpp (https://github.com/SDCDev/shadowcoin/blob/anon/src/ringsig.cpp)

We committed the verification code, so that people can go through it
<snip>

[LucyLovesCrypto]

I am confused.  Is the present ShadowCash release opensource, or not?

Part of it is.

See comment from ryno above regarding the verification code (good)

Some are selling (before block 257,000) because of the closed source spend code (scary)

[ffmad]

I am confused.  Is the present ShadowCash release opensource, or not?

Part of it is.

See comment from ryno above regarding the verification code (good)

Some are selling (before block 257,000) because of the closed source spend code (scary)

LOL.

Look like someone is trying to buy cheap SDC ^^

[yourstruly]

Of course the github source is production capable! Hense its current state. Every other exchange is using it and so are every one of my nodes.
Its on the op, the wiki, and the website.

The github source has not been pushed to in 28 days, it appeared to us looking through the git commits, the majority of the development was not occuring on the github. Our system requires a somewhat up to date coind API so we can provide proof of reserves.

How "up to date" is PPC and Doge? Just curious because the last commits I see is in July for PPC and August for Doge.

I think it may be off topic but I will answer anyways.

Peercoin development appears to be stagnant as far as merging in updates from main trunks on their main github. However there is a community maintained client called PeerUnity, this client is actively maintained and may eventually take over as the primary client.

The doge github appears to us to be pretty stagnant at this point. It has issues and pull requests piling up and they are not merging in the more recent updates from the trunks. If it continues it may lead us to eventually close our DOGE exchanges.

Hey yourstruly

We've committed the verification code for exchanges: https://github.com/SDCDev/shadowcoin/tree/anon
Its enough to build the daemon, and it will be able to accept and verify anonymous transcations.

We've left the spend code out for now, as we wan't to give investors a chance to have something unique.

Thanks rynomaster, you have built something very innovative. We look forward to seeing your progress as the project moves forward.

We built the wallet and are downloading the blockchain. We will be opening up our SDC exchange within the next 24 hours.