5G Wireless Technology Pdf

BLOCK CHAIN:

Block Chain use to protect personal data. Before going toward the term block chain first we must know what are blocks and what are chains?

Block: Are growing list of records, which are linked using cryptography. Each block contains encryption hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree).

A block records some or all of the most recent Bit coin transactions which has not yet entered any prior blocks. So, we can say that the block is like a page or ledger or record book. Each time a Block is Complete, it moves to the next block in the block chain.

Chains: Are links that connected one block with another, each time a block gives way to another block a chain created between blocks.

The Block chain is a basically a block which contain information about Block. Each block has encryption hash of the previous block, a timestamp, and transaction data. Block chain technology is an open distributed log that can record transactions of two parties secure and efficient. The difference between private, consortium, and public block chain networks.

Major type of Block chain:

Public Block chain

The Public block chain is number of marks which is the start of the major types of block chain which we are known today. Look an example of Bitcoin, Litecoin, Ehtereum, the public which are called we the public block chain and effect as the basis of these three. Which offereing the original structure for the distributed ledger. In the public block chain transaction can send and received from anyone to anyone all over the world. Total nodes are given the power transmission. So each node will be the power to audit the transaction. In fact, like to public consensus process. The total constituent nodes need to be authorize a transaction for it to become valid. All the need to be provided is that every node staying in consent with the protocol’s stipulations. As long as this remains so, the transactions of the node will be eligible for validation and subsequent addition to the chain. Cause of all the nodes have equal transmission and receipt power, Because all the nodes have equal transmission and receipt power, And the nodes are decentralized as well as fully. The below graphic explains the difference between distributed, centralized, and decentralized. For many, the attribute of decentralized and distribution are considered to be the major benefits offered by the public block chains. Then again, not all echo this sentiment. More than decentralization and distribution, though, the benefits of public block chains that really stand out are the transparency and security offered by them.

In fact, it is the transparency of the public block chain network that make them secure. The security that’s afforded as a result of transparency is a concept that’s appreciated in open-source and digital currency communities. In Pubic transaction type of block chain can audited by anyone which make it fraudulent activities difficult to go and undetected by them. Different type of block are into peer-to-peer transaction are setup. All of transaction for each block can needed to be validated and synchronize with each of the constituent node of the given public block chain before the block can be added to the system. All the time someone sets up a new node in the network, and using a computer and internet connection, the node will be synced with complete public block chain’s history. Public block chain is not without drawbacks. Being highly transparent doesn’t mean that it’s completely immune to unethical manipulations and security breaches. It is very hard to give 100% guarantee to any technology for security, its means that make your system to avoid who’s creating disturbances in the system. It’s another disadvantage of the public block chains is the very expensive transaction processing in which the time terms, money and energy. Even for a single transaction you need electricity required and since all the nodes of the block chain are needed to authorize the transaction before its addition to the chain. it’s easy to see how the energy costs and time wasting quickly multiply. In the public block chain are an appropriate option when the benefits that one needs are that of decentralization, having full ledger transparency and private anonymity.

Private Block chain:

Private block chain can be considered to have the almost an inverse of all the basic properties block chains. It should be closed to the block chain network, but the private is not completely distributed and decentralized as like the public block chain. There are many specific integral nodes of the network which are allocated the rights to view, create and authorize the transactions. It is up to the block chain developers to decide which node gets and what the rights transaction is. So, while in public block chains there are no middlemen anywhere, in private block chains there is a certain amount of intervention by a middleman. But one may that without decentralization, such as important of the standard block chain, in the purpose of the block chains might be worthless. But it is important to note that block chains are more than just tools that offer decentralization. Their qualities of audit ability and cryptographic security are also worth remarking. When it comes to these attribute it might not be foolproof of block chain, but its still are vast improvement over the traditional system that we have been using this far like data achieving, voting, accounting systems, are just few of the wonderful application areas for block chain still more ts come. In place where implementation of private block chain would make most sense is in a private business or anti-business case. Say a company wants a business solution that’s only available to its employees. In such a scenario would demand the use of a closed network like private block chain, something that’s accessible to inly select group of members. No one outside the company needs to be a part of this private business networks. The private block chains prove definitely to more efficient against public block chain in this use case. And given that private block chains are private after all, they’re great for keeping data storage and transmission on the network as private and restricted to people with access rights only. So, for companies that just need a solution within the scope of their own business, they can certainly benefit from using private block chains.

The block with write access controlled by one organization and the access permission is limited. Such block chain is generally applied in database management, audit, even companies. The private block chain typically requires a trustworthy agent to reach the consensus even when using the same block chain technology, for which it adopts consensus object different from the public block chain. The private block chain may provide a better solution for corporate intend to introduce block chain since it is managed by a trusted party and the encrypted database is commonly shared.

Consortium Block chain:

ATconsortiumTblockchainTisTaTmixTofTtheTpropertiesTofTpublicTandTprivateTblockchains,TitTispartTprivateTandTpartTpublic.TBetweenTprivateTandTpublicTnatureTofTconsortiumTblockchainThappensTonTtheTbaseTofTconsensusTprocess.TInTtheTconsortiumTblockchain,TsoTonlyTaTfewTnodesTselectTofTtheTnetworkTreserveTtheTrightTtoToverseeTtheTconsensusTprocessTandTacuthorizeTtransactions.TOtherTnodesTofTtheTnetworkThaveTotherTrightsTlikeTcreationTofTnewTtransactions,reviewingThistory,TreviewingTtransactionTandTsuchTother.YourTconsortiumTblockchainTcanTbeTmadeTtoTbeTaTmoreTpublicTconsortiumTblockchainTorTmoreTprivateTconsortiumTblockchain.TDependingTonTwhetherTtheTconsortiumTblockchainTisTpredominantlyTpublicTorTprivate,itTwillThaveTtoTcopeTwithTtheTdrawbacksTthatTeachTtypeT(publicTorTprivate)Tentails.THowTtheTconsortiumTblockchainTisTdesignedTwouldTdependTonTindividualTrequirements.