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Security |
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No data encryption or channel partition and is public.
Merkle Patricia Trie Data structure
Data and contracts in Ethereum are encoded but not encrypted and all data is public - therefore all sensitive data should be encrypted locally and hash stored to prove authenticity.
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Public Blockchain with security features built in.
Lamport digital signature algorithm. Claims to be resistant to quantum computer attacks.
Customized P2P network with data storage encryption, location transparency, source nontraceability
Merkle Patricia Trie data structure
Although the hash algorithm built into Bitcoin and Ethereum is secure with todays technology from brute force attacks, quantum computing may support enough computational power to compromise these algorithm.
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Data is only shared between parties involved in the transaction, verifiers, and permissioned observers. This allows an extra layer of security from traditional DLT where the data is spread throughout the network.
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Permissionless
Anyone can download the protocol and validate transactions making it less secure
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Permissionless
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Permissioned
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Limited (zk-SNARKs, Ring signatures)
Privacy in this public permissionless network has been limited. Since the Metropolis hard fork, it became possible to integrate more cryptographic operations in smart contracts - two kinds of technologies are implemented: zk-SNARKs and Ring Signatures.
‘Zero-knowledge’ proofs allow one party (the prover) to prove to another (the verifier) that a statement is true, without revealing any information beyond the validity of the statement itself.
Ring Signatures are a cryptographic technology first introduced in 2001. It enables any member of a group of users to perform a digital signature, that can be proven to be made by a member of this group, while it is impossible to determine by which member of the group.
https://btcmanager.com/good-news-privacy-bitcoin-ethereum/
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Based on zero knowledge proof. Hides the send, receipt address and transfer amount.
Similar in function to the zk-SNARK feature Ethereum added during their Metropolis release.
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Privacy concerns are addressed through the pluggable uniqueness services, and restriction of viewing transactions.
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Algorithms |
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PoW & PoS
Proof of work (PoW) + PoS-based public blockchains in Ethereums upcoming Casper implementation. Opposed to the PoW consensus protocol, the PoS protocol achieves consensus through stakers, sometimes referred to as minters who “stake” their coins by locking them down in specialized wallets. With stakers at work, mining will become redundant, meaning the Ethereum network post-Casper will rely on stakers and staking pools instead of miners for its operability.
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Fast Paxos PoS variant.
The consensus of TRON adopts a three-step strategy.
1. Kafka-based technology system: implement a centralized consensus algorithm.
2. Raft-based distributed consensus mechanism: realize the centralized and distributed leapfrogging. Improves network function/distribution and lays the foundation for distribution with no logical center.
3. Consensus mechanism of Proof of Stake and realize the Byzantine Fault Tolerant Consensus.
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Notaries - Pluggable Framework, Validity consensus and Uniqueness consensus
transaction validity and transaction uniqueness.
https://docs.corda.net/key-concepts-consensus.html
Corda uses special Notary Nodes to reach consensus. Notaries are nodes that specifically address double spend attempts.
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Efficiency |
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Moderate
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Moderate
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Fast
Built for financial applications
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Block Confirmation Time
Details
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~12 blocks
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Fast
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TBD
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Development |
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Proprietary Codebase
Details
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Open Source
https://github.com/ethereum/
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Open source but goverened by the TRON organization
Built on Ethereum, but planning to move to own main net in June 2018
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Open Source
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General |
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Blockchain / DLT type
Details
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Public with Private Forks
Ethereum can be a public or private blockchain. The Ethereum Main network is obviously a public blockchain, but with increasing enterprise-focus a number of projects and consortiums (Ethereum Aliiance) have been launched that develop private blockchains (e.g. Quorum)
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Public
Open source public blockchain fuelled by cryptocurrency.
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Not a blockchain. Uses DLT to create transaction efficiencies between permissioned parties rather than the same ledger for the entire network, which R3 Corda believes is inefficient.
https://vimeo.com/205410473
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Generic, with DApp and Smart Contract support for wider applications
For Ethereum it is not modularity that stands out but the provision of a generic platform suitable for various types of transactions and applications
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Similar to Ethereum:
Generic, with DApp and Smart Contract support for wider applications
It is not modularity that stands out but the provision of a generic platform suitable for various types of transactions and applications
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Less focus on modularity
Focus is on financial applications, but may support more use cases in the future.
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limited by PoW
currently supports a maximum of 15 TPS
designed for public networks, limited by Proof of Work (PoW) consensus
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Currently supports 15 TPS as it is on the Ethereum platform. Will be able to support up to 1000 TPS once main net launches
Scalability is a core feature for TRON. They want to be able to support large commercial projects, while minimizing transactions fees and time.
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Corda focuses on scaling through reducing inefficiencies in consensus mechanisms. By limiting involvement to just the transacting parties, beneficiaries, and verifiers it aims to position itself as more scalable than PoW
performance considerations https://www.corda.net/2017/12/dlt-performance-considerations/
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Varies
https://bitinfocharts.com/comparison/size-eth.html#3m
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Varies
https://tronscan.org/#/blockchain/stats
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Varies
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