¡Por supuesto! para todo ello existen muchas propuestas con soluciones muy interesantes, pero hacer cambios experimentales sobre el código de Bitcoin es arriesgado y, que la mayoría de nodos se adapten, lleva tiempo. Bitcoin es grande y esto hace que la toma de decisiones sea lenta al reflexionarse los cambios de manera muy profunda. Esta toma de decisiones lenta e incapacidad del protocolo de ampliar con modulos las capacidades de Bitcoin es el principal motivo por el que empezaron a salir otras criptomendas centradas en nichos y casos de usos concretos. Era más sencillo clonarse el código abierto de Bitcoin y adaptartlo que esperar a que en Bitcoin se decidiese aceptar su funcionalidad. Este es, principalmente, el motivo por el cual hay cientos de criptomonedas y se necesita un wallet por cada una de ellas, siendo un absoluto caos a veces, ya que todas están desconectadas entre ellas.
Pegged sidechains employ a two-way peg to transfer assets between chains, and they consist of providing proof of possession in the transferring transactions. The idea is to enable the capability of locking an asset on an original parent chain, which can then be transferred to a sidechain before eventually being redeemed on the original chain. Notably, the original asset on the parent chain is locked in a specific output address and is not destroyed like early implementations of sidechains.

2) Yea, blockchain could be a suboptimal MQ Series, a slower append only persistent wire that has a lot of ready-made tools for audit and security analysis (ecosystem argument). As blockchain ecosystem grows all kinds of data transformation tools will appear (e.g. we are working on such). Inside blockchain could be tuned to be less PoW intensive and to cut blocks faster. Besides, the variations of PoS or a hybrid PoW + PoS scheme are emerging which could use the fact that inside, as you say, all network participants can have clear identities, unlike on the public bitcoin’s blockchain.
• ‘Difficulty’: In the Bitcoin network, miners solve an asymmetric cryptographic puzzle to mine new blocks. Over time the puzzle becomes easier, resulting in it eventually taking less than 10 minutes for each new block generation. Hence, the community updates the puzzle every 14 days and makes it more difficult, thus requiring even more computing power to handle the POW algorithm. The ‘difficulty’ parameter controls the complexity of the cryptographic puzzle. This parameter is also used in the Ethereum blockchain as well. Developers should assign a low value (between 0-10,000) to this parameter for this project thus enabling quicker mining.
I said above that you can build sophisticated rules into Bitcoin transactions to specify how ownership is proved. However, the Bitcoin scripting language is deliberately limited and many ideas in the Smart Contracts space are difficult or impossible to implement. So projects such as Ethereum are building an entirely new infrastructure to explore these ideas
Public blockchains are just that, public. Anyone that wants to read, write, or join a public blockchain can do so. Public chains are decentralized meaning no one body has control over the network, ensuring the data can’t be changed once validated on the blockchain. Simply meaning, anyone, anywhere, can use a public blockchain to input transactions and data as long as they are connected to the network.

2. I have not had a chance to read the original article on side chains, but I am sure they deal with my next problem quite adequately. However it is not addressed in the above article. The primary problem that must be addressed with the notion of side chains, as I see it, would be the issue of the mining required to authenticate transactions and enter them into the block chain. The article mentions that side chain system more or less leaves the issue of verification within the side chain transactions as something of a black box, somewhat implying that they don’t have to be considered. But for any user, they would need to be both considered and understood. Such a process would presumably require mining verification of some kind, (our mental model must include consideration of the somewhat unusual verification method for bitcoin transactions themselves, – as everyone would agree, the verification process is not just a “checklist” of valid transaction strings. The validation process requires mining in much the same sense as mining new coin. None of this is mentioned or discussed in the article. ) As a result, the verification of side chain transactions outside the block chain introduces whole new layers of risk into the Bitcoin model, and new layers of unknowns.
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Recordemos, como hemos mencionado anteriormente, que actualmente son cientos los proyectos y monedas alternativas que trabajan con su propia cadena de bloques, totalmente desconectadas de la de Bitcoin. Todas con su cotización volatil. El problema de estas monedas es que ninguna de ellas dispone del efecto red ni de la seguridad que sí tiene Bitcoin. De hecho muchas, pese a haber implementado propuestas interesantes, se quedan en nada, con miles de horas y esfuerzo “tirado a la basura”. Incluso algunas de ellas han replicado el codigo de Bitcoin, pero también los fallos que en ese momento pudiera tener y mientras que en Bitcoin si se han solucionado, en esa Altcoin no.
In private blockchains, only specific, pre-chosen entities have the ability to create new transactions on the chain (this is known as “write permissions”). Thus, a private blockchain is a closed network that offers constituents the benefits of the technology, but is not necessarily decentralized or distributed, even among its members. The extent to which each constituent can view (“read”) and create and validate transactions (“write”) is up to the developers of the chain.
Loom Network is a Platform as a Service built on top of Ethereum that allows developers to run large-scale decentralized applications. This lets developers build DApps with the trust and security of the world’s most secure public blockchain, along with the computing resources necessary to run commercial-scale services. Like how Filecoin tokenized disk space, Loom aims to be the tokenized application protocol of the new decentralized web.
The great thing about Bitcoin, for a tech columnist like me, is that it’s simultaneously over-the-top cinematic and technically dense. Richard Branson recently hosted a “Blockchain Summit” at his private Caribbean island. There’s a Bitcoin Jet. At the same time, 2015 has seen the release of a whole slew of technically gnarly–and technically fascinating–proposals built atop the Bitcoin blockchain.
Jump up ^ Kopfstein, Janus (12 December 2013). "The Mission to Decentralize the Internet". The New Yorker. Archived from the original on 31 December 2014. 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.'
The differences between these types of blockchains are based on the levels of trust existing among the members of the network and the resulting level of security. Indeed, the higher the level of trust between the members of the network, the lighter the consensus mechanism (which aims to add the blocks to the blockchain securely). As we will see, there is no trust between the members of a public blockchain since it is open to everyone and inversely the confidence is much stronger on the private blockchain since members are pre-selected. In networks based on a blockchain, the level of trust among the members therefore directly impacts the structure and mechanisms of the network.
To scale Blockchain, sidechain or childchain solutions cannot be undermined. Sidechains are separate Blockchains that are linked to the main Blockchain using a two-way peg. They are an auxiliary network that executes the complementary function of: faster transactions, lower transaction costs and greater scalability in terms of the number of transactions that can be supported in a network at a given time.

Private blockchains are valuable for solving efficiency, security and fraud problems within traditional financial institutions, but only incrementally. It’s not very likely that private blockchains will revolutionize the financial system. Public blockchains, however, hold the potential to replace most functions of traditional financial institutions with software, fundamentally reshaping the way the financial system works.
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Many people believe this is the future of the blockchain. It maintains network security and allows for scalability. The biggest criticism is that it heavily favors those with more funds as smaller holders have no chance of becoming witnesses. But the reality is, smaller players have no hope of participating in Proof of Work either, as mining from your own laptop at home is no longer a reality. Smaller players get outcompeted by bigger players who have massive mining rigs. STEEM and EOS are examples of DPOS blockchains. Even Ethereum is moving to POS with its Casper project.


Of course, the drawbacks of public and private blockchains are still very much present in the case consortium chains. This all depends on the way each consortium is constructed: a more public consortium chain will bear the burdens of public chains, while a more private one might suffer from the relative lack of openness and disintermediation. The right configuration depends on the needs and vision for each specific chain. Strategy and tailoring are always necessary to get the best solution.

Loom Network is a Platform as a Service built on top of Ethereum that allows developers to run large-scale decentralized applications. This lets developers build DApps with the trust and security of the world’s most secure public blockchain, along with the computing resources necessary to run commercial-scale services. Like how Filecoin tokenized disk space, Loom aims to be the tokenized application protocol of the new decentralized web.
A public blockchain is a platform where anyone on the platform would be able to read or write to the platform, provided they are able to show the proof of work for the same. There has been a lot of activity in this space as the number of potential users that any technology in this space could generate is high.  Also, a public blockchain is considered to be a fully decentralized blockchain. Some of the examples are:
Governance: Every enterprise needs to design standards, processes, methods, and tools to develop and operate a private blockchain. To achieve this they will need tools and frameworks such as IDE, testing framework, security auditing tool etc. For long-term successful operation, they also need to develop high-quality documentation. This requires proactive governance. Read more about the importance of the “Fundamental challenges with public blockchains” here.
– The transactions added to the blockchain are public: the whole world (Member of the network as non-members) can access transactions that are added to the blockchain. The information of the transactions is made public for the miners who do not know the other members, to check the conformity (for example that the person who has created a transaction holds enough bitcoins). These transactions are obviously not nominative, only your public key appears, but if someone knows your public key, he will be able to find all the transactions that you have created.
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– A consensus much faster: the fact that the consensus mechanism is centralized makes it much quicker. In fact, the term “consensus” is no longer adapted since it is rather a recording of transactions on the blockchain. Note that the entity responsible for managing the blockchain can decide to change the parameters of the blockchain and in particular to increase the size of the blocks to be able to add more transactions.
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