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1  Local / Treffen / MimbleWimble & Grin Meetup(s) in Berlin on: June 18, 2018, 12:44:58 PM

Ich bin da. Let's go.
2  Other / Meta / Please No (Hard) Drug Avatars on: April 11, 2015, 09:50:19 AM
I am recovering methamphetamin addict. This guys avatar triggers my addictions/craving for meth.;u=126291

Please disallow drug pictures in avatars. TNX.
(Also I would guess such pictures are NSFW, in most companies.)
3  Local / Projektentwicklung / Jobs in DE und EU - Sammlung & Diskussion on: April 05, 2015, 11:05:20 AM
Conyo - Berlin - potenziell -
Cryptocurrency Bank - ua. München - hiring -

LHV Bank - Estland - potenziell - Quelle: [1]
UBS Bank - London, England - hiring - Quelle: [2]
Level39 - London, England - hiring - Quelle: [2]
Safello - London, England - vermutlich hiring - Quelle: [3]
Atlas Card - London, England - vermutlich hiring - Quelle: [3]
Blocktrace - London, England - vermutlich hiring - Quelle: [3]

Location unknown (todo)
Coinfloor - potenziell - Quelle: [1]

todo - potenziell
Fidor (London)
Satoshi Labs (Prag)
Misc: [Anbieter Zertifizierungen]
Misc: [Studentisches Netzwerk]



Kleine Liste, für alle die, die - wie ich -, einen Job im Bereich Crypto Currency suchen.

Bitte um Mithilfe und Updates, ich editiere dann das OP. Einfach Links zu News, Unternehmenswebseiten oder Stellenausschreibungen posten.

Ich denke, ein Thread zum CC Jobsuche in DE und EU ist ganz angemessen.
4  Alternate cryptocurrencies / Altcoin Discussion / Why do most known experts and widly-respected posters prefer PoW over PoS & PoI? on: April 04, 2015, 07:55:58 AM
Nearly everybody agrees that a Bitcoin-style PoW is I) a huge waste of ressources & esp. energy and leads II) to dangerous centralization of mining.

But, if I scan the forum, I fell like still most pundits prefer PoW.

Why almost all renowned Crypto Currency and Crypto Finance experts [incl. most widly-respected BCT-posters] prefer PoW as consensus algorithm?

Why not use PoS or PoI?
Are there othere preferable consensus algorithms? What about PoB? (
Can PoW be improved?

I am happy with detailed answers, answers in bullet points or just links or references elsewhere.

Thank you!
5  Local / Trading und Spekulation / Wie wahrscheinlich ist ein Kurs von =>$10.000 innerh. der nächsten 5 Jahre? on: December 12, 2014, 05:51:58 PM
Laufzeit: 10 Tage
Votes: angezeigt
6  Other / Meta / How to stop FUD campaigns with bought accounts? on: July 13, 2014, 09:13:02 AM
How to stop FUD campaigns with bought accounts?
All Monero-threads are full of bought and previous months unused, forum accounts spreading FUD against Monero. It's an big campaign, going over weeks now. It's a big problem, really destroying most serious discussion and all the other bad things coming with it.
It's absolutely enough now. How can this be stoped?

To whom I report these accounts? What "evidence" is needed with the report?
Who is going to delete them?
7  Alternate cryptocurrencies / Altcoin Discussion / General CryptoNote Community Thread on: June 20, 2014, 06:30:59 AM
Let's have a general CryptoNote thread to talk about events and infos that matter to our whole CN community.

I start:

- Any infos on "MonetaVerde (MCN)" and "Aeon (AEON)"? How do you rate them? Since when they are approved by CN team?
I am going to read their forums threads now.

- What are the biggest hurdles we need to overcome before CN will reign?


If you are interested in general cryptonote-related chat:
Please join the channel #cryptonotes on the Freenode IRC network.

If you are new to Freenode or IRC in general, please see for infos how to join chatroom.


We have no relation to the current, the "CryptoNote team" or the CryptoNote Foundation.
8  Local / Altcoins (Deutsch) / [Sammlung] CryptoNote - BCN, MRO, FTM, QCN, ... on: May 28, 2014, 11:40:01 PM


--> Untraceable payments
--> Unlinkable transactions
--> Double-spending proof
--> Blockchain analysis resistance
--> Egalitarian proof of work
--> Adaptive parameters

Exchange (BCN, MRO)


What is CryptoNote?

CryptoNote is the technology that allows creation of privacy-centric cryptocurrencies. You can visit their website here. The level of anonymity provided by CryptoNote isn't possible with Bitcoin code base by design. Bytecoin (BCN) was the first cryptocurrency to use CryptoNote and MRO is based on BCN's code.

Two of the main features of CryptoNote are ring signatures that mask sender identities by mixing and unlinkable transactions accomplished by creating one-time keys for individual payments. Their combined effect gives a high degree of anonymity without any extra effort on the part of the user.

Unlike Bitcoin, your funds are not held in the address you give out to others. Instead, every time you receive a payment it goes to an unlinkable address generated with random numbers. When you decide to spend the funds in that one-time address, the amount will be broken down and the components will be indistinguishable from identical outputs in the blockchain.

For example if 556.44 MRO are sent, the protocol will break it down into 500 + 50 + 6 + 0.4 + 0.04 and a ring signature will be performed with other 500's, 50's, 6's, 0.4's, and 0.04's in the blockchain. Unlike the "CoinJoin" mixing method, CryptoNote mixes outputs not transactions. This means no other senders need to be participating with you at the same time or with the same amounts. Any arbitrary amount sent at any time can always be rendered fundamentally indistinguishable (a mathematical proof is given in the white paper).

Ring signatures are explained below. Reproduced from CryptoNote:

A normal signature looks like this. There's only one participant, which allows one-to-one mapping.

A ring signature obscures identities because it only proves that a signer belongs to a group.

This allows a high level of anonymity in cryptocurrency transactions. You can think of it as decentralized and trustless mixing.

How does this compare to other anonymous solutions?

Ring signatures originate from the work of Rivest et al. in 2001 and the implementation in CryptoNote relies in particular on Fujisaki and Suzuki's work on traceable ring signatures. There are two other anonymity implementations currently available or in development. One is ZeroCoin/ZeroCash's use of zero-knowledge proofs. The others are based on gmaxwell's CoinJoin idea (such as mixing services for Bitcoin or the altcoin Darkcoin).

1. Comparison with ZeroCoin and ZKP-based approaches:

You can read about ZeroCoin and zero-knowledge proofs (ZKP) here. The ZK environment allows an anonymity set that includes everyone in the network because the validity of an output can be proven without knowing the corresponding public key until it is spent. The largest risk is that this is recent research-level cryptography that hasn't been subjected to years of cryptanalysis, so exploits may emerge down the road. Ring signatures are much simpler and more mature, with many peer-reviewed papers published over more than a decade.

Other issues with ZKP include the RSA private key used to initiate the accumulator, which must be trusted to be destroyed by the generating party. It also obscures the entire economy, not just sender/receiver identities. If the ZK system is compromised, then an attacker can continuously spend coins that don't exist using false proofs. This damage is hidden from everybody due to total blinding and consequently at any given time it's not possible to know if the network has already been compromised. There is a tradeoff between these inherent risks and the maximal anonymity set provided by ZKP. CryptoNote aims for a different balance through the dual layers of privacy provided by one-time keys and ring signatures.

2. Comparison with CoinJoin-based approaches:

MRO is more qualitatively similar to mixing implementations like CoinJoin. The differences arise in the departure from the Bitcoin protocol, which allows MRO to use new cryptography to provide decentralized and trustless mixing of superior quality. The critical problem with mixing services is the need to trust the operators. As an example,'s mixer gives the following disclaimer: "However if the server was compromised or under subpoena it could be force to keep logs. If this were to happen although you haven't gained any privacy you haven't lost any either."

The CoinJoin-inspired Darkcoin performs mixing with selected "masternodes" since it still uses ordinary signatures that can be mapped one-to-one. The motivation is that a randomly selected node is less likely than a single service to exhibit bad faith (such as keeping logs) . In practice, a few VPS companies host the vast majority of nodes and this approach relies on the integrity and good behavior of these nodes. MRO's more fundamental cryptographic approach doesn't have these vulnerabilities and the quality of anonymity is much higher.

MRO's ring signatures are also far more secure and convenient than CoinJoin because they mix outputs not transactions. This means a transaction doesn't involve waiting around for other senders to mix with. Nor is a user restricted to mixing only if others are sending the same amount. Arbitrary amounts can be sent at any time without anyone else's participation. This feature makes a timing analysis of the blockchain useless. The degree of anonymity is also a choice rather than decided by the protocol: do you want to be hidden as one among five or one among fifty? The size of the signature grows linearly as O(n+1) with the ambiguity so greater anonymity is paid for with higher fees to miners.

Overview of a transaction

Bob decides to spend an output, which was sent to the one-time public key. He needs Extra (1), TxOutNumber (2), and his Account private key (3) to recover his one-time private key (4).

When sending a transaction to Carol, Bob generates its Extra value by random (5). He uses Extra (6), TxOutNumber (7) and Carol's Account public key (8) to get her Output public key (9).

In the input Bob hides the link to his output among the foreign keys (10). To prevent double-spending he also packs the Key image, derived from his One-time private key (11).

Finally, Bob signs the transaction, using his One-time private key (12), all the public keys (13) and Key Image (14). He appends the resulting Ring Signature to the end of the transaction (15).

wichtige Wiki-Links
Mining-Algo CryptoNight:

Liste cryptonote-basierten Coins
- Bytecoin (BCN)
- Monero (MRO) [ehemals Bitmonero BMR)]
- Fantomcoin (FTM)
- Quazarcoin (QCN)
- Mountaincoin? (Huh)
- Poolberry (Huh) -

wichtige Infos zu einzelnen crypnote-basierten Coins
- aktive Kooperation mit dem I2P-Anonymisierungsnetzwerk,


Let's go!

Bitte Infos/Links, etc. ergänzen. OP wird fortwährend ausgebaut.

Es darf frei über die revolutionäre neue Coin-Plattform diskutiert werden.
Bevorzugt Tech-Themen als Kurs-Verläufe. Wink

Begründet eure Aussagen! Versucht hochwertige Beiträge zu schreiben!
9  Alternate cryptocurrencies / Announcements (Altcoins) / ☆☆☆ [Coin Privacy] Overview, Comparison and Rating ☆☆☆ on: March 27, 2014, 05:18:20 PM
List of Privacy Coins

Darkcoinwww.darkcoin.ioBCT Linktodo---
ZeroCashunknownBCT Linktodo---

Coin Presentation

Q. Is there a paper wallet?

Q. How many people own Darkcoin?


Q. Is there an estimated date on DarkSend being out of beta and a "finished" product? (@March 26, 14)

Q. What is the difference between ZeroCoin and Darkcoin [DarkSend]?

Q. Is there a white paper for DarkSend?

Q. Step By Step, how is the DarkSend Protocol actually working?

Q. Will DarkSend be open source?

Dark Gravity Wave

Q. What is the difference between KGW and DGW?


Q. Does Darkcoin mining use 50% less electricity than scrypt mining?

Q. Does Darkcoin mining produce 30% less heat than scrypt mining?

List of Privacy Features or Services for established Coins

CoinJoin ...
SharedSend ...
Tumbler ...
Mixer ...

Explanations IT-Security

Infos about TOR =
Infos about I2P =


I will update OP with any info you add to thread.

Let's go!
10  Local / Altcoins (Deutsch) / Allgemeiner Litecoin-Thread on: March 26, 2014, 08:43:48 PM
Ich habe auf gelesen, angeblich würden die Transaktionen im Litecoin-Netzwerk auch schneller relayen (nicht confirmen, es geht um relayen), als Bitcoin-Transaktionen im Bitcoin-Netzwerk.

Stimmt das? Hat jemand Quellen/Links dazu?
11  Other / Meta / Are there unpaid moderators? on: March 25, 2014, 07:50:01 PM
I understood mods are paid. So its obvious, why no new mods are added.

Leads me to the question: Are there any unpaid (subforum) moderators?

If no: Is there a chance the creation of a new position/job as "unpaid moderator" aka
"voluntarily non contract moderator" is possible?
12  Local / Altcoins (Deutsch) / [] Suche GFX/HTML/CSS und Security Audit on: March 24, 2014, 08:30:25 PM
Liebe Freunde,

wir betreiben unter ein Sexcoin Instant Wallet im Beta Modus.

Wie ihr seht, ist doch dort aktuell nur das rohe Wallet-Software-System online,
ohne jegliche grafische Gestaltung/Layout. Es handelt sich um ein Bootstrap-/JS/JQuery-Projekt.

Dingend suchen wir deshalb jemanden der das ganze eben etwas aufhübscht,
via Gestaltung der HTML-Files, CSS-Definitionen und ggf. eines Logos.
Was sich halt so anbietet. Wer sowas kann, bitte einfach mal melden.
Wir handeln eine gebührlich Bezahlung aus. (Wir sind sehr flexibel.)

Zwecks Security, falls jemand spontan etwas Unsicheres sieht oder Verbesserungsvorschläge hat bitte mitteilen. Wir finden dann gemeinsam hoffentlich eine faire Entlohnung.
SSL kommt bald (wieder), wir besitzen ein valides

Vielen Dank.

13  Local / Altcoins (Deutsch) / ☆ DE Altcoin Chat ☆ on: March 23, 2014, 11:12:37 AM
Hier ein allgemeiner, deutscher Altcoin Talk-Thread - mancher würde sagen Plauder-Thread - rund um Altcoins, die deutsche und internationale Altcoin-Szene, sehr altcoin-nahe Bitcoin-Themen, relevante Links & Co.


- on-topic bleiben (og. Themen), also alles rund um BTC und was sonst so im alten Kursthread besprochen wurde, dh. keine Gespräche über Kinofilme, Konzerte, neue Spielkonsolen usw.

- keine Privatgespräche

- es gelten alle allgemeinen Boardregeln, sowie alle Regeln die BitLex und phantastisch noch ergänzen

- bei Links immer wenigstens den Titel der Seite angeben/nennen, soweit möglich und noch besser wäre immer ihr schriebt kurz was zum Inhalt (kopiert zb. den Teaser-Text von Nachrichten) und falls nicht aufderhandliegend ergänzt bitte, warum etwas (der Link) interessant ist, bei Links zu technischen Abhandlungen oder neuen Analysen/Einschätzungen von Experten oder ähnliches

- zusätzlich: wenn ihr Links zu Videos postet, bitte nennt immer gleich die Stellen wo es interessant wird (alá "startet bei 3:05 mins")

- wenn ihr Links zu Nachrichtenartikeln postet, versucht diese gleich zu kommentieren und einzuordnen soweit sinnvoll (um neuen relevanten Content zu schaffen)

- Kurz-URL-Dienste zur URL-Verschleierung sind verboten (aus Sicherheitsgründen)

- auf saubere Rechtschreibung, freundlichen Umgangston ist zu achten, keine Beleidigungen

Viel Spass!
14  Other / Meta / Would an altcoin tipbot be allowed? on: March 21, 2014, 06:29:23 AM
Would an altcoin tipbot like "/u/altcointip" or "/u/dogetipbot" on reddit be allowed on this forum?

Question is, altcoin tipping allowed?

Is altcoin tipping allowed over the whole forum?

Is altcoin tipping allowed only in alt sub section?
15  Local / Altcoins (Deutsch) / Big Altcoin Trends 2014 on: March 17, 2014, 02:58:40 PM
Ganz starken Trend Q1/Q2 2014 seh ich bei "Airdrop"-Coins. Aurora-, Spain- und Scot-Coin ist ganz klar erst der Anfang. Aber auch seriösere Releases, wie die werden als Airdrop-Coin designed und gestartet.
Persönlich find ich dieses Airdrop-Konzept auch eine gute Überlegung. Das sorgt für Commitment, Traction, wenn der Marktwert gleich dadurch so einsteigt wie bei Spain oder Aurora auch für einen starken Marketing-Effekt.

Also was ich meine ist - bevor es wieder Missverständnisse gibt - Trend Q1/Q2 2014:
- es wird massig Airdrop-Coin-Releases geben
- diese werden den Aufmerksamkeitsfokus (Community, Medien) auf sich ziehen
- zur Wert- & Kursentwicklung dieser Coins kann ich nichts sagen, habe ich mir keine Gedanken gemacht

Wie wird sich die Altcoin-Welt verändern, wenn die Top 30 aus 25 Regional-Airdrop-Coins besteht?

Wieviel Airdrop-Coins werden wir sehen, wenn der Aurora-Airdrop gut funktioniert? 50? 100?

Discuss! Und bitte weitere Trends ergänzen.
16  Economy / Service Discussion / Attn Xpost: What's the best Bitcoin escrow software system? on: February 27, 2014, 10:43:21 AM
Any one can suggest or has recommendations which open source Bitcoin escrow to use or which one to avoid?

I found with minimal research these public projects: system:
BitScrow system: Provably Secure Bitcoin Escrow system:

Are these the free major system or should I search at other places than github?

Goal is to run a small, commercial escrow-site. Project doesnt fancy design like Eskonto or (scam page), basic like Bitscrow is enough.
And its supposed to be classic escrow agent type of escrow.
Crazy multi-sig-escrow is not needed. (Site is targeting normal people, not the super intelligent bitcoin elite running the latest nighly builds of every BTC client.)

Thanks for any input.
17  Bitcoin / Development & Technical Discussion / What's the best Bitcoin escrow software system? on: February 27, 2014, 10:41:57 AM
Any one can suggest or has recommendations which open source Bitcoin escrow to use or which one to avoid?

I found with minimal research these public projects: system:
BitScrow system: Provably Secure Bitcoin Escrow system:

Are these the free major system or should I search at other places than github?

Goal is to run a small, commercial escrow-site. Project doesnt fancy design like Eskonto or  (scam page), basic like Bitscrow is enough.
And its supposed to be classic escrow agent type of escrow.
Crazy multi-sig-escrow is not needed. (Site is targeting normal people, not the super intelligent bitcoin elite running the latest nighly builds of every BTC client.)

Thanks for any input.
18  Bitcoin / Bitcoin Discussion / Krebsonsecurity: "Florida Targets High-Dollar Bitcoin Exchangers" on: February 13, 2014, 02:02:38 AM
Florida Targets High-Dollar Bitcoin Exchangers

State authorities in Florida on Thursday announced criminal charges targeting three men who allegedly ran illegal businesses moving large amounts of cash in and out of the Bitcoin virtual currency. Experts say this is likely the first case in which Bitcoin vendors have been prosecuted under state anti-money laundering laws, and that prosecutions like these could shut down one of the last remaining avenues for purchasing Bitcoins anonymously.

michaelhackfeedbackWorking in conjunction with the Miami Beach Police Department and the Miami-Dade State Attorney’s office, undercover officers and agents from the U.S. Secret Service’s Miami Electronic Crimes Task Force contacted several individuals who were facilitating high-dollar transactions via, a site that helps match buyers and sellers of the virtual currency so that transactions can be completed face-to-face.

One of those contacted was a user nicknamed “Michelhack.” According to this user’s profile, Michelhack has at least 100 confirmed trades in the past six months involving more than 150 Bitcoins (more than $110,000 in today’s value), and a 99 percent positive “feedback” score on the marketplace. The undercover agent and Michelhack allegedly arranged a face-to-face meeting and exchanged a single Bitcoin for $1,000, a price that investigators say included an almost 17 percent conversion fee.

According to court documents, the agent told Michelhack that he wanted to use the Bitcoins to purchase stolen credit cards online. After that trust-building transaction, Michelhack allegedly agreed to handle a much larger deal: Converting $30,000 in cash into Bitcoins.

Investigators had little trouble tying that Michelhack identity to 30-year-old Michell Abner Espinoza of Miami Beach. Espinoza was arrested yesterday when he met with undercover investigators to finalize the transaction. Espinoza is charged with felony violations of Florida’s law against unlicensed money transmitters – which prohibits “currency or payment instruments exceeding $300 but less than $20,000 in any 12-month period” — and Florida’s anti-money laundering statutes, which prohibit the trade or business in currency of more than $10,000.

Police also conducted a search warrant on his residence with an order to seize computer systems and digital media. Also arrested Thursday and charged with violating both Florida laws is Pascal Reid, 29, a Canadian citizen who was living in Miramar, Fla. Allegedly operating as proy33 on, Reid was arrested while meeting with an undercover agent to finalize a deal to sell $30,000 worth of Bitcoins.

Documents obtained from the Florida state court system show that investigators believe Reid had 403 Bitcoins in his on-phone Bitcoin wallet alone — which at the time was the equivalent of approximately USD $316,000. Those same documents show that the undercover agent told Reid he wanted to use the Bitcoins to buy credit cards stolen in the Target breach.

Nicholas Weaver, a researcher at the International Computer Science Institute (ICSI) and at the University of California, Berkeley and keen follower of Bitcoin-related news, said he is unaware of another case in which state law has been used against a Bitcoin vendor. According to Weaver, the Florida case is significant because is among the last remaining places that Americans can use to purchase Bitcoins anonymously.

“The biggest problem that Bitcoin faces is actually self-imposed, because it’s always hard to buy Bitcoins,” Weaver said. “The reason is that Bitcoin transactions are irreversible, and therefore any purchase of Bitcoins must be made with something irreversible — namely cash. And that means you either have to wait several days for the wire transfer or bank transfer to go through, or if you want to buy them quickly you pay with cash through a site like”

One very popular method of quickly purchasing Bitcoins — BitInstant — was shuttered last year. Last month, BitInstant CEO Charlie Shrem was arrested for money laundering, following allegations that he helped a man in Florida convert more than a million dollars in Bitcoins for use on the online drug bazaar Silk Road.

It’s still unclear how the defendants Espinoza and Reid were able to obtain so many Bitcoins for sale, although a review of Michelhack’s profile suggests little more than arbitrage — that is, buying Bitcoins for $700 apiece and selling them for a couple hundred dollars more.

Weaver said he anticipates that more states will soon seek to crack down on high-dollar Bitcoin sellers on “I’d expect many more state cases like this one because it will act to strangle the lifeblood of the online dark markets,” such as Silk Road, Weaver said. “If you want a significant amount of anonymous Bitcoins, right now this community is about the only mechanism still available.”

News of the Florida actions comes on the heels of the arraignment of Ross Ulbricht — the alleged onetime owner of the Silk Road. Ulbricht was scheduled to be arraigned in New York today.

The court documents in this case also offer a great example of the traceability of Bitcoin transactions — a potential danger for both those seeking anonymous payments and for law enforcement officials posing as criminals as part of an undercover investigation. The ICSI’s Weaver noted that, by examining the times and transactions in the criminal complaint, it appears that this is the Bitcoin wallet associated with the undercover officer.

19  Local / Treffen / Bitcoin 2014 - 15. bis 17. Mai 2014 - Amsterdam on: January 22, 2014, 09:54:12 PM
Offizielle Konferenz 2014 der Bitcoin Foundation.

- Datum: 15. bis 17. Mai 2014
- Bitcoin 2014 will take place at the Passenger Terminal on the beautiful Amsterdam waterfront in the heart of the city.
20  Local / Deutsch (German) / [Sammlung] Best of Bitcoin-Content on: January 22, 2014, 06:24:02 PM
Adam Back Interview

Adam Back is a British Cryptographer and crypto-hacker. He’s the inventor of Hashcash, the proof of work system used by Bitcoin and after we were initially introduced by a mutual acquaintance Charles Hoskinson, I met him at the vegas conference surrounded by a large huddle of conference attendees listening to him speak in the hall.

Adam very rarely does interviews, and so when he agreed without too much reticence I was thrilled. I’m a pretty sharp guy, but I know my strengths and organized what I hoped would be a half hour interview between he and Andreas M. Antonopoulos the next morning before our Brunch meetup.

We finished brunch and Andreas never showed up, today I’m pleased to share with you the reason why.

What follows is a very deep, lengthy and many times highly technical conversation about Bitcoin. It will not be for everybody, but I encourage you to listen to it anyhow because it is an important conversation.
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