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      "body": "**Coins mentioned in post:**\n\nCoin | | Price (USD) | 📉 24h | 📈 7d\n- | - | - | - | -\n**BCN** | Bytecoin | 0.003$ | _-10.25%_ | _34.76%_\n**BTC** | Bitcoin | 6650.470$ | _0.17%_ | _12.37%_\n**DASH** | Dash | 240.224$ | _-3.02%_ | _9.02%_\n**ZEC** | Zcash | 175.788$ | _-4.57%_ | _14.79%_",
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      "title": "Discussion\tof Comparison Bitcoin and Altcoins",
      "body": "Bitcoin leads as the first successful crytocurrency in the world. Its successors are altcoins. Altcoins have been developing for different deficiency in Bitcoin or with innovative ideas.\n\nBitcoin has not privacy. So this brings new innovative crytocurrency ideas like Anoncoin with extensions for I2P or Tor anonymous networks, Bytecoin with ring signature technology, Dash with mixing services, Zcash with cryptographic protocols like zero-knowledge proofs. But these altcoins do not have market capitalizations as large as Bitcoin and price as high as Bitcoin price. Bitcoin has longer history than altcoins. \n\nSo, it has more investors and users as normal. But it is foreseen that Zcash will find a high majority of users because of its fully private transaction property. Although, some communities have criticisms that untraceable transactions cause money laundering, tax evasion and higher trading in black markets with illegal drugs, weapons, human trafficking, stolen credit cards, fake driver licenses, child pornography. These criticisms are valid for all anonymous altcoins.\n\nThe second must improvement for Bitcoin is scalability. As its first years, scalability was not a big deal because of its small size blockchain and network size. But with time scalability debates raised. Bitcoin community and developers started to improve different proposals like BIP family and innovative blockchain ideas like Bitcoin-NG. But it has some security concerns. Also for scalability, some blockchain pruning developments have been studied by researchers. There is a tradeoff between security and scalability in the big picture. As we explained in scalability chapter, some scalability improvement proposals have pitfalls in terms of security. Developers and community of Bitcoin settled on a consensus about scalability and we will experience in future 1-2 years how it will work for security and scalability.",
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      "title": "A comparative study of bitcoin and alternative cryptocurrencies",
      "body": "Bitcoin is the leader and by far the most widely used cryptocurrency. So, many researches and development have been studied about Bitcoin and altcoins. we discussed technical background of Bitcoin altcoins like Zcash, Ripple, Peercoin and Dash. Also, we compared Bitcoin and these altcoins in terms of different deficiencies of Bitcoin.\n\nIn privacy, Bitcoin has some problems like traceable transactions and disclosing users identity. To handle this problem, Zcash has been developed. Zcash promises private transactions by using ZK-SNARKS cryptographic schemes.\n\nIn transaction malleability, Bitcoin faced a major attack. It was an implementation of Bitcoin transactions of exchange company. But, it is seemed as if a problem is in Bitcoin's source code problem. But after this incident, all exchange clients were patched. Also altcoins rooted from Bitcoin patched their client software against to transaction malleability attack. After that, Zcash proposed transaction nonmalleability scheme for this kind of vulnerability. So, Zcash is resistant to transaction malleability attacks in the future.\n\nIn scalability, it is very clear that Bitcoin will face a big scalability problem in the future. So, Ripple developed a new payment network by using off-chain transactions by increasing number of transactions per second. But scalability will be a common problem for Bitcoin and all altcoins. There is not any found accurate method to handle scalability problem in decentralized systems. There are some proposals for scalability problem that solves some particular problems in scalability. \n\nIn terms of attacks, Bitcoin and generally altcoins have vulnerabilities to attack successfully. Because cryptocurrencies have new different infrastructures and unknown properties. With time, new explorations will be found and will be taken new precautions for new vulnerabilities. Cryptocurrency is a new interest area for users and developers. So, it cannot be predicted which vulnerability will be detected in Bitcoin and altcoins.\n\nWe presented an extensive Bitcoin and altcoin research based on academic researches and online resources. We compared Bitcoin and some altcoins by using different perspectives. It showed that many new researches for cryptocurrency world have been studied every day. Along with new development, it showed there is not any flawless cryptocurrency yet. Because there are many aspects to examine for fullfledged cryptocurrency concept. In spite of these many defects of Bitcoin and altcoins, they are highly popular in the market and they got significant attention of users for their different properties. But still any altcoin could not get attention and market share as much as Bitcoin.\n\nThere are many aspects to improve like privacy, scalability, security, energy consumption, new blockchain ideas. After Bitcoin, nearly 2700 different alternative coins have been invented for different usage areas and aims. Altcoins have become popular topic in cryptocurrency space. New altcoins with different mining algorithms like Litecoin, Primecoin have been developed. A new altcoin called Peercoin replaced mining with a lightweight method and Ripple developed a new cryptocurrency network to exchange all kinds of coins including fiat currencies in an efficient way. Dash was created for untraceable transactions by using mixing services. After that, for privacy concern Zcash was developed by a group of crypto experts by hiding sender, receiver and amount of transaction. With Bitcoin, blockchain become very popular technology to implement very different applications on it. Namecoin, Colored Coin, Ethereum benefits from blockchain features to implement innovative applications. It is believed that there will not be any payment system without blockchain technology for secure transactions. Blockchain is not only promising for payment technologies but also it will be an essential part of smart contracts, notary operations. Since 2009, lots of altcoins came to the market and a new one is being developed every week. Bitcoin opened a new era for the future of money and new breakthroughs. \n\nwe planned to develop some improvements for Bitcoin architecture for some problems like privacy, scalability and vulnerabilities to attacks. But Bitcoin network is too large to test Bitcoin architectural improvements. Bitcoin fixes are hard to deploy to test its performance. Although it has a testnet to test Bitcoin improvements, it needs to have a large number of users to see results of the test. For Bitcoin scalability, we considered to improve sidechains, treechains and micropayment methods in this thesis. But Bitcoin is a big network and it is hard to adopt an improvement. So, we will leave these improvements as a future project as open problems or to large communities who have large network environments and hardware. Also, for privacy some zero-knowledge protocol fixes can be possible for Bitcoin. For small third parties like us, new development testing is not easy to conduct for now. So, in this thesis we could not test new improvement to Bitcoin because of hardware and network constraints. For now, we leave these problems as open problems for future researchers.",
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      "author": "gezentuccar",
      "permlink": "a-comparative-study-of-bitcoin-and-alternative-cryptocurrencies",
      "title": "A comparative study of bitcoin and alternative cryptocurrencies",
      "body": "Bitcoin is the leader and by far the most widely used cryptocurrency. So, many researches and development have been studied about Bitcoin and altcoins. we discussed technical background of Bitcoin altcoins like Zcash, Ripple, Peercoin and Dash. Also, we compared Bitcoin and these altcoins in terms of different deficiencies of Bitcoin.\n\nIn privacy, Bitcoin has some problems like traceable transactions and disclosing users identity. To handle this problem, Zcash has been developed. Zcash promises private transactions by using ZK-SNARKS cryptographic schemes.\n\nIn transaction malleability, Bitcoin faced a major attack. It was an implementation of Bitcoin transactions of exchange company. But, it is seemed as if a problem is in Bitcoin's source code problem. But after this incident, all exchange clients were patched. Also altcoins rooted from Bitcoin patched their client software against to transaction malleability attack. After that, Zcash proposed transaction nonmalleability scheme for this kind of vulnerability. So, Zcash is resistant to transaction malleability attacks in the future.\n\nIn scalability, it is very clear that Bitcoin will face a big scalability problem in the future. So, Ripple developed a new payment network by using off-chain transactions by increasing number of transactions per second. But scalability will be a common problem for Bitcoin and all altcoins. There is not any found accurate method to handle scalability problem in decentralized systems. There are some proposals for scalability problem that solves some particular problems in scalability. \n\nIn terms of attacks, Bitcoin and generally altcoins have vulnerabilities to attack successfully. Because cryptocurrencies have new different infrastructures and unknown properties. With time, new explorations will be found and will be taken new precautions for new vulnerabilities. Cryptocurrency is a new interest area for users and developers. So, it cannot be predicted which vulnerability will be detected in Bitcoin and altcoins.\n\nWe presented an extensive Bitcoin and altcoin research based on academic researches and online resources. We compared Bitcoin and some altcoins by using different perspectives. It showed that many new researches for cryptocurrency world have been studied every day. Along with new development, it showed there is not any flawless cryptocurrency yet. Because there are many aspects to examine for fullfledged cryptocurrency concept. In spite of these many defects of Bitcoin and altcoins, they are highly popular in the market and they got significant attention of users for their different properties. But still any altcoin could not get attention and market share as much as Bitcoin.\n\nThere are many aspects to improve like privacy, scalability, security, energy consumption, new blockchain ideas. After Bitcoin, nearly 2700 different alternative coins have been invented for different usage areas and aims. Altcoins have become popular topic in cryptocurrency space. New altcoins with different mining algorithms like Litecoin, Primecoin have been developed. A new altcoin called Peercoin replaced mining with a lightweight method and Ripple developed a new cryptocurrency network to exchange all kinds of coins including fiat currencies in an efficient way. Dash was created for untraceable transactions by using mixing services. After that, for privacy concern Zcash was developed by a group of crypto experts by hiding sender, receiver and amount of transaction. With Bitcoin, blockchain become very popular technology to implement very different applications on it. Namecoin, Colored Coin, Ethereum benefits from blockchain features to implement innovative applications. It is believed that there will not be any payment system without blockchain technology for secure transactions. Blockchain is not only promising for payment technologies but also it will be an essential part of smart contracts, notary operations. Since 2009, lots of altcoins came to the market and a new one is being developed every week. Bitcoin opened a new era for the future of money and new breakthroughs. \n\nwe planned to develop some improvements for Bitcoin architecture for some problems like privacy, scalability and vulnerabilities to attacks. But Bitcoin network is too large to test Bitcoin architectural improvements. Bitcoin fixes are hard to deploy to test its performance. Although it has a testnet to test Bitcoin improvements, it needs to have a large number of users to see results of the test. For Bitcoin scalability, we considered to improve sidechains, treechains and micropayment methods in this thesis. But Bitcoin is a big network and it is hard to adopt an improvement. So, we will leave these improvements as a future project as open problems or to large communities who have large network environments and hardware. Also, for privacy some zero-knowledge protocol fixes can be possible for Bitcoin. For small third parties like us, new development testing is not easy to conduct for now. So, in this thesis we could not test new improvement to Bitcoin because of hardware and network constraints. For now, we leave these problems as open problems for future researchers.",
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