Share
VIDEOS 1 TO 50
What is Double Spending
What is Double Spending
Published: 2014/04/28
Channel: Ofir Beigel
What is double spending?
What is double spending?
Published: 2017/11/21
Channel: BitByBit
Double-Spending Problem Explained by a Developer
Double-Spending Problem Explained by a Developer
Published: 2018/03/20
Channel: Decentralized Products
Blockchain tutorial 22: Double spending, third party
Blockchain tutorial 22: Double spending, third party
Published: 2017/05/01
Channel: Mobilefish.com
Part #3 - How Bitcoin Authenticates A Payment & Eliminates Double Spending - By Tai Zen
Part #3 - How Bitcoin Authenticates A Payment & Eliminates Double Spending - By Tai Zen
Published: 2013/11/27
Channel: Cryptocurrency Market
How Bitcoin shields you from Double Spending! | Watch Now!
How Bitcoin shields you from Double Spending! | Watch Now!
Published: 2017/10/09
Channel: Coiner
What is Bitcoin "Double Spending" and "Selfish Mining"? These are the best explanations I
What is Bitcoin "Double Spending" and "Selfish Mining"? These are the best explanations I've seen.
Published: 2017/12/09
Channel: Crypto Me!
How Bitcoin Solves the Double Spend Problem Caused by Fractional Reserve Banking
How Bitcoin Solves the Double Spend Problem Caused by Fractional Reserve Banking
Published: 2017/12/15
Channel: Cheapest Bitcoin Price
How To Double Spend Your Stuck Bitcoin Transaction with FSS-RBF
How To Double Spend Your Stuck Bitcoin Transaction with FSS-RBF
Published: 2015/08/15
Channel: m1xolyd1an
Why bitcoin transactions are so slow and why there is a huge risk of double spending?
Why bitcoin transactions are so slow and why there is a huge risk of double spending?
Published: 2014/07/02
Channel: Bitcoin For Dummies
What is DOUBLE-SPENDING? What does DOUBLE-SPENDING mean? DOUBLE-SPENDING meaning & explanation
What is DOUBLE-SPENDING? What does DOUBLE-SPENDING mean? DOUBLE-SPENDING meaning & explanation
Published: 2017/10/04
Channel: The Audiopedia
NANO (RaiBlocks) - Double Spending and Confirmation
NANO (RaiBlocks) - Double Spending and Confirmation
Published: 2018/01/21
Channel: Lucas Santos
Using Glass Hunt
Using Glass Hunt's Double Spending Tool for Bitcoin
Published: 2016/09/08
Channel: Glass Hunt
Bitcoin Tutorial #8 - Das Double Spend Problem
Bitcoin Tutorial #8 - Das Double Spend Problem
Published: 2018/01/02
Channel: The Morpheus Tutorials
What is Bitcoin Double Spending
What is Bitcoin Double Spending
Published: 2017/09/19
Channel: TheBitcoinBlog
Double Spend Bitcoin
Double Spend Bitcoin
Published: 2017/11/10
Channel: MR Bitcoin
Doing VERY EASY Double Spends on DASH
Doing VERY EASY Double Spends on DASH
Published: 2018/06/09
Channel: Vin Armani
Bitcoin Double Spend Tool (Tutorial)
Bitcoin Double Spend Tool (Tutorial)
Published: 2017/02/18
Channel: bitexploit
USDT Tether Double Spend?
USDT Tether Double Spend?
Published: 2018/06/28
Channel: Nugget's News
BITCOIN TRANSACTION - DOUBLE-SPENDING ATTACK (51% ATTACK)
BITCOIN TRANSACTION - DOUBLE-SPENDING ATTACK (51% ATTACK)
Published: 2017/05/13
Channel: LÊ THANH HIẾU
Exchange Issue Allows USDT Double Spend,  And More | News Update 30/06/18
Exchange Issue Allows USDT Double Spend, And More | News Update 30/06/18
Published: 2018/06/30
Channel: Topic: Crypto
Does Bitcoin protect against double spending?
Does Bitcoin protect against double spending?
Published: 2016/11/19
Channel: Bit Media
The Double Spending Problem
The Double Spending Problem
Published: 2016/01/08
Channel: Various Artists - Topic
Holo Fuel Security: Double Spend Attack is Not Possible
Holo Fuel Security: Double Spend Attack is Not Possible
Published: 2017/12/29
Channel: Holo
Double Spend Attack on Zencash - BEWARE!
Double Spend Attack on Zencash - BEWARE!
Published: 2018/06/09
Channel: Chronos Crypto
Bitcoin Double-Spend Tool Now Available to All: Interview w/ Glass Hunt
Bitcoin Double-Spend Tool Now Available to All: Interview w/ Glass Hunt's Hackers
Published: 2016/09/14
Channel: Dash - Digital Cash
NEO + Cardano = 15X Gains | $USDT Double Spend | HitBTC Ban
NEO + Cardano = 15X Gains | $USDT Double Spend | HitBTC Ban
Published: 2018/06/29
Channel: Crypto Love
No, Tether Wasn’t Hit by a Double Spend Attack
No, Tether Wasn’t Hit by a Double Spend Attack
Published: 2018/06/30
Channel: CoinKorea
Double spending and block propagation visualization in a bitcoin network
Double spending and block propagation visualization in a bitcoin network
Published: 2014/07/17
Channel: Andrea Passaglia
How Does Bitcoin Solve The Double Spending Problem
How Does Bitcoin Solve The Double Spending Problem
Published: 2018/04/17
Channel: jube lack
Bitcoin 51% Attack - Clearly Explained
Bitcoin 51% Attack - Clearly Explained
Published: 2018/05/25
Channel: Nugget's News
51%  ( majority )  hash power attack in bitcoin ! what is double spend ? monopoly of blockchain
51% ( majority ) hash power attack in bitcoin ! what is double spend ? monopoly of blockchain
Published: 2018/04/15
Channel: Hacks And Security
Como o nano (raiblocks) evita o "double spending"?
Como o nano (raiblocks) evita o "double spending"?
Published: 2018/02/07
Channel: André Abadesso
Bitcoin Casino Gets Double Spent
Bitcoin Casino Gets Double Spent
Published: 2016/09/09
Channel: Glass Hunt
Bitcoin, double spending e proof of work.
Bitcoin, double spending e proof of work.
Published: 2017/03/31
Channel: bitgirl
Double Spend Tool For Bitcoin
Double Spend Tool For Bitcoin
Published: 2017/10/31
Channel: Bitsler Script 2018
Tether Double-Spending Vulnerability; Cryptojacking Up 629% in Q1 2018 according to  McAfee;
Tether Double-Spending Vulnerability; Cryptojacking Up 629% in Q1 2018 according to McAfee;
Published: 2018/06/29
Channel: The Krypto Kid
Nicolas Courtois On Hash Rate 51 and Protection Against Double Spending In Bitcoin and Other Crypto
Nicolas Courtois On Hash Rate 51 and Protection Against Double Spending In Bitcoin and Other Crypto
Published: 2014/09/30
Channel: Bitcoinference
Military Spending Review: Ukraine plans to double spending on the armed forces
Military Spending Review: Ukraine plans to double spending on the armed forces
Published: 2015/04/13
Channel: UKRAINE TODAY
Bitcoin Gold Hit by Double Spend Attack, Exchanges Lose Millions
Bitcoin Gold Hit by Double Spend Attack, Exchanges Lose Millions
Published: 2018/05/23
Channel: CoinKorea
Double spend là gì? 51% attack? |-blockdev-|
Double spend là gì? 51% attack? |-blockdev-|
Published: 2018/01/12
Channel: block dev
How To Double Spend Bitcoins - Free Software
How To Double Spend Bitcoins - Free Software
Published: 2017/06/13
Channel: Bitcoin Laundromat
Clash of Lords 2 - Spending 26k Jewels Double Spend Event LGW & Wishing Tree
Clash of Lords 2 - Spending 26k Jewels Double Spend Event LGW & Wishing Tree
Published: 2018/03/18
Channel: Fun Game Reviews
Bitcoin Gold Suffers 51% Attack
Bitcoin Gold Suffers 51% Attack
Published: 2018/05/23
Channel: MrSotko CryptoCurrency
Cryptocurrency and Double spend problem [BlockChain]
Cryptocurrency and Double spend problem [BlockChain]
Published: 2017/02/20
Channel: DLT Labs
(114th Congress) Rep. Burgess on Bitcoin & Federal Double-Spending
(114th Congress) Rep. Burgess on Bitcoin & Federal Double-Spending
Published: 2016/07/23
Channel: Zack Voell
블록체인 강의 시리즈: Sybil Attack and Double Spending
블록체인 강의 시리즈: Sybil Attack and Double Spending
Published: 2018/05/13
Channel: Information and Intelligence
Clash of Lords 2 - $150 Spending 30k Jewels 10x Hire Double Spend Event Lords Gone Wild Wishing Tree
Clash of Lords 2 - $150 Spending 30k Jewels 10x Hire Double Spend Event Lords Gone Wild Wishing Tree
Published: 2017/10/14
Channel: Fun Game Reviews
Crypto Market Analysis Today 6/28/18 FALSE Tether Double Spend, $300M Moved for $.04 cents, Red Day
Crypto Market Analysis Today 6/28/18 FALSE Tether Double Spend, $300M Moved for $.04 cents, Red Day
Published: 2018/06/29
Channel: Rat Grind
Clash of Lords 2 - Spending 18k Jewels - 10x  Hire - Double Spend Event - Guild United Quest
Clash of Lords 2 - Spending 18k Jewels - 10x Hire - Double Spend Event - Guild United Quest
Published: 2017/10/13
Channel: Fun Game Reviews
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Double-spending is a potential flaw in a digital cash scheme in which the same single digital token can be spent more than once. This is possible because a digital token consists of a digital file that can be duplicated or falsified.[1][2] As with counterfeit money, such double-spending leads to inflation by creating a new amount of fraudulent currency that did not previously exist. This devalues the currency relative to other monetary units, and diminishes user trust as well as the circulation and retention of the currency. Fundamental cryptographic techniques to prevent double-spending while preserving anonymity in a transaction are blind signatures and particularly in offline systems, secret splitting.[2]

Prevention[edit]

The prevention of double-spending attack has taken two general forms: centralized and decentralized.

Centralized[edit]

This is usually implemented using an online central trusted third party that can verify whether a token has been spent.[2] This normally represents a single point of failure from both availability and trust viewpoints.

Decentralized[edit]

By 2007, a number of distributed systems for the prevention of double-spending had been proposed.[3][4]

The cryptocurrency bitcoin implemented a solution in early 2008. It uses a cryptographic protocol called a proof-of-work system to avoid the need for a trusted third party to validate transactions. Instead, transactions are recorded in a public ledger called a blockchain. A transaction is considered valid when it is included in the blockchain that contains the most amount of computational work. This makes double-spending more difficult as the size of the overall network grows.[5] Other cryptocurrencies also have similar features.

Decentralized currencies that rely on blockchain are vulnerable to the 51% attack, in which a malicious actor can rewrite the ledger if they control enough of the computational work being done.[6] For example, one could theoretically spend cryptocurrency then erase the transaction so it appears it never happened. In May 2018 this double-spending technique was used against Bitcoin Gold, the 26th largest cryptocurrency,[7] to defraud cryptocurrency exchanges of millions of dollars.[8] In response, exchanges repeatedly raised the threshold needed to confirm a transaction, but the criminal had enough computing power to exceed those thresholds and continued double-spending for three days.[9][8]

References[edit]

  1. ^ The Double Spending Problem and Cryptocurrencies. Banking & Insurance Journal. Social Science Research Network (SSRN). Accessed 24 December 2017.
  2. ^ a b c Mark Ryan. "Digital Cash". School of Computer Science, University of Birmingham. Retrieved 2017-05-27. 
  3. ^ Jaap-Henk Hoepman (2008). "Distributed Double Spending Prevention". arXiv:0802.0832v1Freely accessible [cs.CR]. 
  4. ^ Osipkov, I.; Vasserman, E. Y.; Hopper, N.; Kim, Y. (2007). "Combating Double-Spending Using Cooperative P2P Systems": 41. doi:10.1109/ICDCS.2007.91. 
  5. ^ Janus Kopfstein (12 December 2013). "The Mission to Decentralize the Internet". The New Yorker. Retrieved 30 December 2014. The network’s "nodes"—users running the bitcoin software on their computers—collectively check the integrity of other nodes to ensure that no one spends the same coins twice. All transactions are published on a shared public ledger, called the "block chain" 
  6. ^ Varshney, Neer (2018-05-24). "Why Proof-of-work isn't suitable for small cryptocurrencies". Hard Fork | The Next Web. Retrieved 2018-05-25. 
  7. ^ "Bitcoin Gold loses millions as it is hit by a double spend attack". Fast Company. 2018-05-24. Retrieved 2018-05-25. 
  8. ^ a b "Double Spend Attack on Exchanges". The Bitcoin Gold Community Forum. Retrieved 2018-05-25. 
  9. ^ "Hacker Makes Over $18 Million in Double-Spend Attack on Bitcoin Gold Network". BleepingComputer. Retrieved 2018-05-25. 

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license