HashFlare (SHA-256)
4 stars based on
48 reviews
In cryptographyscrypt pronounced "ess crypt" [1] is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service.
A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrenciesfirst implemented by an anonymous programmer called ArtForz in Tenebrix and followed by Fairbrix and Litecoin soon after. A password-based key derivation function password-based KDF is generally designed to be computationally intensive, so that it takes a relatively long time to compute say on the order of several hundred milliseconds.
Legitimate users only need to perform the function once per operation e. However, a brute-force attack would likely need to perform the operation billions of times, at which point the time requirements become significant and, ideally, prohibitive.
This allows an attacker with sufficient resources to launch a large-scale parallel attack by building hundreds or even thousands of implementations of the algorithm in hardware and having each search a different subset of the key space. This divides the amount of time needed to complete a brute-force attack by the number of implementations available, very possibly bringing it down to a reasonable time frame.
The scrypt function is designed to hinder such attempts by raising the resource demands of the algorithm. Specifically, the algorithm is designed to use a large amount of memory compared dogecoin scrypt or sha 256 calculator other password-based KDFs, [4] making the size and the cost of a hardware dogecoin scrypt or sha 256 calculator much more expensive, and therefore limiting the amount of parallelism an attacker can use, for a given amount of financial resources.
The large memory requirements of scrypt come from a large vector of pseudorandom bit strings that are generated as part of the algorithm. Once the vector is generated, the elements of it are accessed in a pseudo-random order and combined to produce the derived key. A straightforward implementation would need to keep the entire vector in RAM so that it can be accessed as needed.
Dogecoin scrypt or sha 256 calculator the elements of the vector are generated algorithmically, each element could be generated on the fly as needed, only storing one element in memory at a time and therefore cutting the memory requirements significantly. However, the generation of each element is intended to be computationally expensive, and the elements are expected to be accessed many times throughout the execution of the function.
Thus there is a significant trade-off in speed in order to get rid of the large memory requirements. This sort of time—memory trade-off often exists in computer algorithms: The idea behind scrypt is dogecoin scrypt or sha 256 calculator deliberately make this trade-off costly in either direction.
Thus an attacker could use an implementation that doesn't require many resources and can therefore be massively parallelized with limited expense but runs very slowly, or use an implementation that runs more quickly but has very large memory requirements and is therefore more expensive to parallelize. Scrypt is used in many cryptocurrencies as a proof-of-work algorithm. It was first implemented for Tenebrix released in September and served as the dogecoin scrypt or sha 256 calculator for Litecoin and Dogecoinwhich also adopted its scrypt algorithm.
In a Password Hashing Competition was held to develop an improved key derivation function. From Wikipedia, the free dogecoin scrypt or sha 256 calculator. Not to be confused with Script disambiguation. Retrieved 21 January A Guide to the Most Promising Cryptocurrencies". Antonopoulos 3 December Retrieved 27 June Litecoin Scrypt Mining Configurations for Radeon List Comparison Known attacks. Collision attack Preimage attack Birthday attack Brute-force attack Rainbow table Side-channel attack Length extension attack.
History of cryptography Cryptanalysis Outline of cryptography. Symmetric-key algorithm Block cipher Stream cipher Public-key cryptography Cryptographic hash function Message authentication code Random numbers Steganography. Retrieved from " https: Cryptographic hash functions Cryptographic algorithms Key derivation functions.
Articles with example pseudocode Pages using RFC magic links. Views Read Edit View history. This page was last edited on 9 Mayat By using this site, you agree to the Terms of Use and Privacy Dogecoin scrypt or sha 256 calculator.
