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1  Bitcoin / Pools / Possible link between recent BTC pool DDoS and Solidcoin 2 ? on: October 21, 2011, 11:20:26 AM
There has been an interesting observation posted here

I believe some of you might find it relevant to your interests. Not that it is necessarily true, but worth keeping an eye on
2  Alternate cryptocurrencies / Altcoin Discussion / [LIST][TEMPORARY] All tenebrix bounties (till website section gets sorted out) on: October 15, 2011, 01:53:12 AM

Until site gets proper bounty section, here's what TBX bounties are available (auto-track folks, consolidating this for ya)

Tenebrix Service bounty - a Tenebrix Ponzi "Game"

Tenebrix Service bounty - a Tenebrix Poker Room

TENEBRIX CODE BOUNTY -  burning  fees

Bounty on a collection of Windows minerd builds (will most likely go to Twobits, but who knows - a challenger may still appear)
3  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE] TENEBRIX CODE BOUNTY on: October 14, 2011, 12:19:07 AM
Okay, the first TBX code bounty isn't very horribly sophisticated, and the reward will be equivalent of 25 BTCs in TBX @ moment of completion (just so that dear programming types don't worry that much about TBX value fluctuations, a concern some candidates have expressed)

What I want is to slightly tweak fee system so that it becomes a mild deflationary influence. This is one of several upcoming tweaks that introduce deflationary influences (perhaps not strong ones, but combined they will amount to something)  to TBX without cutting subsidies or involving any form of demurrage, since deflation folks are giving  a fascinating ammount of sustained grief (they even found my reg email, somehow  Angry ), and after a while I decided that if someone wants "deflashun" so bad, I may as well find ways to give it to him without compromising core commitments of TBX (such as no subsidy decrease and no demurrage)

The gist is as follows:


Basically, currently both mandatory and "speed me up" transaction fees are being sent to the miner.

In a setting where miners will never switch to "feed on fee" model, the fees play only two roles - discourage spam in the chain and "bribe" the miner to process your tx faster (a very "down the line" issue when the net is teeming with them tx'es)

My idea is to basically impose a rule that says that "if currently set fee for a transaction is  2*(minimum mandatory fee for this transaction) or more, BUT no less than X, then it is a TIP.

Tips are sent to the miner and thus normal "miner bribe" stuff applies"

Meanwhile, if fee for a transaction is less than X and/or less than  2*(minimum mandatory fee for this transaction), then it's a fee and it gets destroyed a-la namecoin coin destruction.

Thus, we still can "tip" the miners (with certain minimum for a tip being  X ), but usual "mandatory-antispam" fees are burned, thus creating an additional deflationary effect without "offending" miners or disrupting user's normal coin hoarding inclinations.

In case both a tip and a fee are present (minimum mandatory fee is 0.1, X=0.2, user sets his fee to 0.2), the "minimum transaction fee" is burned and the remaining part is used as "tip" to the miner (if minimum transaction fee is 0.1, X value is 0.2 and user has set his fee to 0.2, 0.1 is burned and the remaining 0.1 is used as fee)

Fee-burning would be best made  network-mandatory for mandatory fees (that is, blocks that contain TXes that don not include a burned fee but  SHOULD have included a burned "minimum transaction fee" per "minimum fees" rules would be best rejected by well-behaving nodes.

Also, it would be nice for an option that would enable a user to knowingly make a transaction that would burn a specified number of coins to be added.

The mechanism should be ready for deployment at "block N", and should be implemented in a manner that only requires 51% of miners to upgrade (and not all clients), and generally care should be taken to minimize the disruption those who fail to upgrade in time could cause.


Art Forz has reviewed this proposal for "general sanity" and will review submissions. The implementation that is found to have no flaws as per ArtForz's assesment, and/or the first to correct any flaws found, shall receive the bounty.

More (tiny but distinctly deflationary) tweaks to come.
4  Alternate cryptocurrencies / Altcoin Discussion / [TENEBRIX ANNOUNCE] ATTENTION INTEL USERS on: October 12, 2011, 12:15:43 PM
Your help is needed for testing windoze builds
5  Economy / Gambling / [TBX bounty] Ponzi game for Tenebrix on: October 12, 2011, 11:12:23 AM
One more bounty for seasoned developers and "c-currency ponzi game" operators to take a stab at

Make a TBX ponzi game
6  Alternate cryptocurrencies / Altcoin Discussion / Since SC2 is dead, maybe it is a good time to release the sources ? on: October 11, 2011, 11:46:04 AM
So other people can gaze at the dissected cadaver and learn what NOT to do ?
7  Economy / Gambling / Bounty for alt-currency gambling service development! on: October 07, 2011, 08:13:10 PM
Hi there, there is this new cryptocurrency, Tenebrix (well, if you didn't hear about it yet, it's trading pretty decently at and is discussed here

It has a bounty for developing a gambling service

First Tenebrix Service bounty - a Tenebrix Poker Room

I'm pretty sure some of you guys here are seasoned and rugged gambling service devs for whom this is basically free money ^__^

8  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE][BOUNTY] Second Tenebrix Service bounty - a Tenebrix Ponzi "Game" on: October 07, 2011, 08:02:52 PM
As suggested here, I also post a 1000 TBX bounty on first "bitcoin ponzi" clone to use Tenebrix.

As usually, sources of the outcome should be open, because open-source rulez.

9  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE][BOUNTY] First Tenebrix Service bounty - a Tenebrix Poker Room on: October 07, 2011, 04:28:12 PM

Time to start making some services for Tenebrix, right ?

I guess it's time for a currency with an (upcoming  Grin) unique transaction mixer of immense strength to meet the wonderful, shiny world of gambling, thus, the first service I'd very like to see is a Tenebrix-driven poker room service.

After some contemplation, watching the buy and sell orders at btc-e, some more contemplation, whispering and watching at gloomy sky, I've decided to set this bounty at 3000 TBX.

As usual, the code of the service should be open and free.

Show it some love, gentledevelopers!
10  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE, short one] Alt-currency Tenebrix now also traded on: October 01, 2011, 09:23:34 PM
Just one more thing some of you respected speculators might enjoy playing with in your spare time
11  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCEMENT] Tenebrix needs Bounty Fund Directors...Who would that be? on: September 30, 2011, 01:14:03 AM
As per most recent consensus in #Tenebrix, the 1.5m TBX Tenebrix Dev Fund, which is supposed to be used to

* Pay developers for Tenebrix improvement and fixes (across the span of several years)

* Arranging for urgent hiring of needed professionals should need for an "ASAP" fix arise

* Pay bounties to a variety of services and such to reward acceptance

* Support other needs of Tenebrix across the span of several years

is to be divided among several trustworthy individuals with high esteem in the community.

Of course, it is up to the community to propose candidates and find a consensus as to who should those people be.

I guess that's all, let's hear whom you deem worthy

12  Economy / Speculation / [Short announce] Alternate cryptocurrency GeistGeld is now traded on: September 29, 2011, 05:32:42 PM
At Btc-e.

Just thought some of you guys might feel like toying there in ya spare time   Cheesy
13  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE] GeistGeld pooled mining beta is a go. I say again, Geist Pool is a go on: September 28, 2011, 07:19:45 AM
Hello everybody!

Simplecoin is now running a public beta of Geist pooling

Sign up at

Discuss in main thread.

Over and out.

14  Alternate cryptocurrencies / Altcoin Discussion / [FUN FACT] Geist Geld exchange coming on: September 28, 2011, 12:58:47 AM
Just to inform you guys that me and the  exchange (which shall not yet be named) have  concluded  preliminary testing and everything on their side appears running as a clock.

Expect announcement of exact time and date of trade opening in under 36 hours

Now, I go get some sleep...
15  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE] Geistgeld has been updated, exchange notified on: September 27, 2011, 12:49:46 PM
Please proceed to update your geist stuffs.

Notes on update process and stuff - in the thread.
16  Alternate cryptocurrencies / Altcoin Discussion / [POLL] Geist Geld folder structure - get rid of %APPDATA"/Bitcoin ? on: September 26, 2011, 11:44:43 AM
Hi community!

The question is thus:

Would you rather have Geist's default folders be like    

 "\Application Data\Bitcoin\geistdata" ( "~/.bitcoin/geistdata" on linuxes)


"\Application Data\geistgeld\geistdata" ( "~/.geistgeld/geistdata" on linuxes) ?

(I'm renaming the testnet folder in any case, tho worry not, the wallet hiden within will be easily copied over into the new folder. Also default config will be now geist.conf)

I have been receiving mixed feedback and decided to invoke democracy Smiley
17  Alternate cryptocurrencies / Announcements (Altcoins) / [ANNOUNCE] Tenebrix, a CPU-friendly, GPU-hostile cryptocurrency on: September 26, 2011, 12:09:44 AM
We heard you like mining, so we put a miner on your miner, so you can mine while you mine.

Note: try changing -s in the miner batch to 3, 5, or 7. Experiment which is best for you.

Official Website:

Hello everybody!

Allow me to introduce you Tenebrix, a cryptocurrency we (mostly ArtForz, but I contributed the name, some minor tweaks and the logo, as well as windows portability suite and cool genesis motto Wink ) have created to provide the community with a cryptocurrency with solid GPU resistance.

It implements a proof-of-work scheme based on scrypt, a cryptographic construct specifically designed to resist creation of efficient GPU, FPGA and even ASIC implementations. You can find more about scrypt and how it can improve your stamina, masculine appeal and performance here

Tenebrix is intended not only to become the first and the best of CPU-specific cryptocurrencies, but remain so in the future (that's exactly where the Tenebrix Protection Fund will go... That, usability/gui bounties, fixes and my dream of starting up a massive coin laundering "Historical Cryptocurrency Collector" Service Cheesy)

So, now I guess it's the FAQ time.

Q: Why would we care about that? (c) bitcoin2cash

A: Well, for starters, Tenebrix offers you opportunity to mine some coins that will be eventually exchangeable with spare cpu cycles of your awesome 4-card mining box that it doesn't use anyhow:)

Second, it makes for a more diverse adoption base since there is no "you must have a fairly loud and specific bit of narrow-purpose hardware at least THIS cool to even try mining" effect (pools will still be kings though)

Q:  What are the basic parameters, blocktimes and stuff, you know ?

A: 1 block per 5 minutes, retargets every week, no upper bound on mining and 25 coins per block.

Q: Oh noes inflation!

A: No, Tenebrix, just like Geist Geld, is actually deflationary in a way, and in fact allows for "coin regeneration" to happen, but I believe it would be best to contain discussion of "no upper bound mining" and "Coin regeneration" to Geist Geld thread

Q: Why the name ?

A:  Initial idea was Tenebris, because it is a cryptocurrency that thrives in the shade of any major GPU-mining operation, peacefully enjoying   the spare cpu cycles of miner rigs (of which they have a lot)

However, it was determined that plain Tenebris is kinda meh and lacks bite, and thus Tenebrix, the cryptocurrency with solid stance in favor of the CPU and against GPU, was born

And yes, I abhor the %insert_word%coin naming scheme.

Q: What if in The Future Nvidia will make GPUs based on genetically engineered rat neuron cultures that will crunch Scrypt like so much stale cheese ?

A: Efforts shall be taken not only keep up, but peek ahead of the curve and ensure that tenebrix remains CPU friendly and GPU hostile, no matter what kind of GPUs future science will throw at us. Being  FPGA and ASIC hostile is harder, given their flexibility, though frankly, if someone, at some point in time, will be willing to throw that kind of money and engineering skillz at mining Tenebix, that already makes Tenebrix a success  Grin

Largest Tenebrix bounties will be for  finding ways to implement Tenebrix mining on GPU hardware in a manner that outcompetes a CPU of equal price range by a certain margin (under discussion, suggestions welcome), and ready to apply fixes that return Tenebrix its status of a CPU-friendly, GPU-hostile cryptocurrency.
Hopefully, Tenebrix will bring together talented people with interest in designing systems resistant to creation of efficient GPU (as well as FPGA and ASIC) implementations a-la scrypt.

And, of course all results of Tenebrix project, produced via bounties or otherwise, will be free and open-source  !

Q: What about botnets ? CPU mining is a haven for them, and they are eeeeeevil!

A: Well, actually, that's an interesting topic to discuss.

First and foremost, if it is possible to make a CPUsclusive cryptocurrency (and it seems that Tenebrix makes quite a solid practical argument in favor of possibility of such a feat), then it will be made eventually. So not making Tenebrix would have achieved nothing.

Second, I am firmly convinced that botnets, by virtue of need to remain somewhat covert, will not abuse their host machines too heavily with TBX minning, taking spare cycles here and there without encumbering the user too much (otherwise the malware will get noticed and exterminated), and assuming mining is lucrative, will avoid using infected machines for things that are likely to get a FBI clown car visit the formal owner of the infected box (such as transfer of highly illegal materials and attacks against legitimate infrastructure).
Thus, Tenebrix, should it succeed and achieve popularity, will lead to overall calmer, milder internet for all Smiley

Q: I heard you may have taxes...

A: NO ! Never ! Except for standard transaction fees, Tenebrix is a sworn tax heaven !

Q: I heard you premined, you bad bad person...

A: Well yes, I premined 7 million coins. Why so many - well, to be completely blunt and honest, I got a bit tired of a discussion of how much should one premine that I had going on and used the premine value from GeistGeld. Perhaps not the wisest decision, but worry not though - I will use 2 millions do fuel verry slow (no more than 4 TBX per user, may get less if their price rises) faucets with strong user ID (Google Acc + captchas), and about 1.5 mils are set aside to help recruit developers and sustain support for no less than 6 years (you gotta agree that it is a looong road and a lot of money-gulping things can happen)

I will use the rest to start a unique transaction-anonymization service, using them as a buffer of sorts (old TBX + fee enters, crispy TBX from reserve exit in a certain randomized manner. In the end, I keep only the "fees" and the "old TBX" that entered the service are retained to form a new buffer as old one shrinks. Thus, the amount of TBX destined for buffer remains static forever, and never ever enters circulation, sequestered as a "transaction mixing service buffer" forever. I think we can all agree that stronger transaction mixing is a good thing and a benefit to community Smiley )

Q: Will you pay people these new coins for posting about the great awesomeness of Tenebrix and its solid stance against GPUs on Twitter and deadnotebook livejournal ?

A:  I dunno. Haven't made up my mind.

Q:  What do you call a coin with this thing ?

A: Whatever you like! I personally like "brix" due to association with obscure local computer jargon for a CPU and general appeal of solid, reliable building materials.

Q: Will you give away brix like you did with Geists ?

A: Yup, about 3825 brix are up for grabs, and will be equally divided among first five people to post their Tenebrix addresses


A: If a technological feat is possible, man will do it. Almost as if it's wired into the core of our being.

Q: Where are the windows binaries ? (text emvastened by popular demand)

A: Here, with neato QT GUI and wrapped in a portability suite so that you don't have to set anything up and have easier time backing stuff up.
The multithread miner is included with a startup script (START_MINING) that is interactive, gives hints, and has pre-set work-out-of-the-box download-and-mine defaults !

Q: Where are the sources ?

A: Here, on github

Q: What about multi-threaded miners ?

A: Glad you've asked ! A mod of Jgarzik's reference CPU miner is included with the portable Tenebrix bundle (minerd, a launch .bat pre-configured for 2 threads, default login/pass and localhost is included. Bear in mind that if launched without command line options the miner crashes, which is known to confuse and disturb users Wink )

Miner sauce here

Q: Pools ?

A: Several weeks after first Geist pool launch (pssssst, you heard nuthin ! )
18  Alternate cryptocurrencies / Altcoin Discussion / [ANNOUNCE] Geist Geld now has a website! on: September 20, 2011, 11:24:10 PM
And an over-the-top motto Smiley
19  Bitcoin / Pools / inquiry about a spherical pool in vacuum - how many "bicoin nodes" does it need on: September 16, 2011, 11:15:34 PM

Basically, the question is thus:

How many nodes (that is, connections from perspective of BTC network) does a nicely  sized (that is, member of top 6) BTC pool need, and approximately how does it scale ?

Hard numbers not required, just general range

20  Alternate cryptocurrencies / Altcoin Discussion / Comparative confirmation security of different alt block chains on: September 16, 2011, 01:34:12 AM

As it is widely (maybe Wink ) known, there are numerous alt blockchains now, with different target block  rate.

Since yours truly has given "life" to a blockchain with a particularly short block rate (a block per 15 seconds, doing remarkably nice so far), a discussion has started as to how exactly, from mathematical perspective, does security of a "single confirmation" compare between two blockchains with different target block rate.

Assume two blockchains with exactly same total network performance  
Assume that one of them (A) has a "target" block generation rate of one block per ten minutes, and another (B) has a target block generation rate of one block per 100 minutes (for ease of calculation)

Assume each chain has an attacker with 30% of overall total hashrate  of attacker's respective network.

Each attacker is trying to pull a double-spend against a transaction per classic "gambler's ruin" scenario in his respective network.

Which attacker would have an easier time ? (or, to put it differently, which network has "more security" to its single confirmation and how does one go about comparing it?)

Thank you very much.
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