Proof-of-space

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Proof-of-space PoSpacealso bitcoin submitblock example proof-of-capacity PoCis a means of showing that one has a legitimate interest in a service such as sending an email by allocating a non-trivial amount of memory or disk space to solve a challenge presented by the service provider.

The concept was formulated bitcoin submitblock example Dziembowski et al. Proof-of-space is related to, but also considerably different from, memory-hard functions and proofs of retrievability. After the release of Bitcoin, alternatives to its PoW mining mechanism were researched and PoSpace was studied in the context of cryptocurrencies. Proofs of space are seen as a fairer and greener alternative due to the general-purpose nature of storage and the lower energy cost required by storage.

Several theoretical and practical implementations of PoSpace have been released and discussed, such bitcoin submitblock example SpaceMint and Burstcoin.

A proof-of-space is a piece of data that a prover sends to a verifier to prove that the prover has reserved a certain amount of space. For practicality, the verification process needs to be efficient, namely, consumes a small amount of space and time.

For soundness, it should be hard for the prover to pass the bitcoin submitblock example if it does not actually reserve the claimed amount of space. One way of implementing PoSpace is by using hard-to-pebble graphs. The prover commits to the labeling. The verifier then asks the prover to open several random locations in the commitment. Proofs of space could bitcoin submitblock example used as an alternative to proofs of work in the traditional client puzzle applications such as anti-spam measures and denial of service attack prevention.

Proof-of-Space has also been used for malware detection, by determining whether the L1 cache of a processor is empty e. PoSpace has been used in the Burstcoin cryptocurrency founded in August Bitcoin submitblock example goal of depending on smaller miners was most typified by the original Android app to mine Burstcoin. However, by Decemberthe estimated network size approachedterabytes and the average mining payoff was 21 burst per week per terabyte, so participants with disk space measured in gigabytes are no longer likely to receive significant payback from mining.

Ina paper proposed a cryptocurrency called SpaceMint. In using PoSpace for decentralized cryptocurrency, the protocol has to be adapted to work in a non-interactive protocol since each individual in bitcoin submitblock example network has to behave as a verifier. Blockchain developed by the creator of Bittorrent, based on proofs of space and time. From Wikipedia, the free encyclopedia. This article relies too much on references to primary sources.

Please improve this by adding secondary or tertiary sources. March Learn how and when to remove this template message. When Space is of the Essence". Retrieved 8 January Retrieved 1 November A Cryptocurrency Based on Proofs of Space. Retrieved 31 October Ethereum Ethereum Classic KodakCoin. Dogecoin Gulden Litecoin PotCoin.

Dash Decred Primecoin Auroracoin. Proof-of-authority Proof-of-space Proof-of-stake Proof-of-work system. Anonymous Internet banking Bitcoin network Complementary currency Crypto-anarchism Cryptocurrency exchange Digital currency Double-spending Electronic money Initial coin offering Airdrop Virtual currency. Retrieved from " https: Cryptocurrencies Algorithms and data structures Cryptography. Articles lacking reliable references from March All articles lacking reliable references All articles with unsourced statements Articles with unsourced statements from Bitcoin submitblock example Use bitcoin submitblock example dates from April Views Read Edit View history.

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