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Monero (/ m ə ˈ n ɛr oʊ /; Abbreviation: XMR) is a cryptocurrency which uses a blockchain with privacy-enhancing technologies to obfuscate transactions to achieve anonymity and fungibility. Observers cannot decipher addresses trading Monero, transaction amounts, address balances, or transaction histories.
One popular system, used in Hashcash, uses partial hash inversions to prove that computation was done, as a goodwill token to send an e-mail. For instance, the following header represents about 2 52 hash computations to send a message to calvin@comics.net on January 19, 2038: X-Hashcash: 1:52:380119:calvin@comics.net:::9B760005E92F0DAE
In the context of cryptocurrency mining, a mining pool is the pooling of resources by miners, who share their processing power over a network, to split the reward equally, according to the amount of work they contributed to the probability of finding a block.
This is especially true of cryptographic hash functions, which may be used to detect many data corruption errors and verify overall data integrity; if the computed checksum for the current data input matches the stored value of a previously computed checksum, there is a very high probability the data has not been accidentally altered or corrupted.
The salt and hash are then stored in the database. To later test if a password a user enters is correct, the same process can be performed on it (appending that user's salt to the password and calculating the resultant hash): if the result does not match the stored hash, it could not have been the correct password that was entered.
A common use of one-way compression functions is in the Merkle–Damgård construction inside cryptographic hash functions. Most widely used hash functions, including MD5, SHA-1 (which is deprecated [2]) and SHA-2 use this construction. A hash function must be able to process an arbitrary-length message into a fixed-length output.
The term "consistent hashing" was introduced by David Karger et al. at MIT for use in distributed caching, particularly for the web. [4] This academic paper from 1997 in Symposium on Theory of Computing introduced the term "consistent hashing" as a way of distributing requests among a changing population of web servers. [5]
Scrypt is used in many cryptocurrencies as a proof-of-work algorithm (more precisely, as the hash function in the Hashcash proof-of-work algorithm). It was first implemented for Tenebrix (released in September 2011) and served as the basis for Litecoin and Dogecoin , which also adopted its scrypt algorithm.