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|White paper||"HUSH Protocol Specification"|
|Initial release||17 November 2016|
|Latest release||3.4.0 / 18 June 2020|
|Operating system||Linux, Windows, macOS|
|Source model||Open Source|
|Timestamping scheme||Delayed Proof of Work|
|Block reward||12.5 Hush|
|Block time||2.5 minutes|
Search Hush on Amazon.HUSH, or Hush, is a privacy cryptocurrency focused on censorship-resistant private communications and built using the Zcash Protocol to provide enhanced privacy and fungibility for its users compared to other cryptocurrencies such as Bitcoin. Like Bitcoin, Hush has a fixed total supply of 21 million coin and also has the same halving interval. Hush has a pre-mine of just 16,000 Hush with a block reward of 12.5 Hush.
Hush began as a source code fork of Zcash with "transparent" transactions as the default and more secure "shielded" transactions were optionally encouraged. Moving forward, Hush shielded transactions will become mandatory at block height 340,000 to increase user privacy. The Hush blockchain is currently at block 218,686.
In November 2016, Hush, which was originally called "Zdash", was started by Joseph Stuhlman. On November 17, 2016, the Hush network came into existence with the mining of the genesis block (block number 0) of Hush.
On May 30, 2017, Stuhlman left the project and David Mercer (radix42) became the project's lead developer. radix42 is known as the person that successfully "bugged satoshi to start the first bitcoin mailing list". On July 7, 2017, the Hush team made an announcement on the bitcointalk website regarding Hush and its development timeline. Also, on July 7, 2017, the Hush Headquarters was founded at Regions San Francisco Bay Area, West Coast, Western US.
On February 11, 2018, the HushList Protocol Specification whitepaper was published by Duke Leto and radix42. In October 2018, Hush version 2 launched which integrated Komodo’s dPoW (Delayed Proof-of-Work), which is a blockchain technology that notarizes chain data to effectively eliminate the chances of double-spends and 51% attacks. Later in 2018, radix42 left the project following disputes with miners and Duke Leto became the project's lead developer.
On June 26, 2019, Hush version 3 launched which migrated to a new mainnet. On September 27, 2019, Leto first publicized a CVE which affected all Zcash Protocol coins, CVE-2019-16930. This CVE description reads as: "Zcashd in Zcash before 2.0.7-3 allows discovery of the IP address of a full node that owns a shielded address, related to mishandling of exceptions during deserialization of note plaintexts. This affects anyone who has disclosed their zaddr to a third party."
On May 24, 2020, Duke Leto and the Hush Developers released a whitepaper entitled "Attacking Zcash Protocol For Fun And Profit". This whitepaper outlines how the ITM Attack (a linkability attack against shielded transactions) works against Zcash Protocol, which the whitepaper describes as "Metaverse Metadata Attacks". The whitepaper explains that Hush is the first cryptocoin to implement a defensive mitigation against it, which is called ”Sietch". Sietch is currently running live in production and is written in C++. Any Zcash Protocol cryptocoin can "upgrade" to the Sietch-enabled Hush Protocol if they choose to mitigate against this type of attack.
Hush aims to be much more than a simple Zcash "clone" through its secure messaging, previously unavailable protocol-level security features, and consistent community focus. Other cryptocurrencies are implementing private messaging (such as LOKI and CCX in the Monero world), however none of these cryptocurrencies have true 51% attack protection as they rely on masternodes. Hush does not and will never run on masternodes.
Hush aims to be a Full Stack Privacy Coin, with smart contracts running on top of the full power of Zero Knowledge data structures that exist in all Zcash forks.
- Zero Knowledge Core
- Private Messaging: Hush has a messenger and Hushlist which are state of the art privacy for communication using zkSNARKS tech
- Safe: Hush uses Delayed Proof of Work (dPOW) which is 51% attack resistant
- Hushlist: Secure Private messenger for anonymous and pseudonymous chat
- AtomicDEX: a decentralized cryptocurrency exchange (developed by Komodo) which supports HUSH and many other currencies
- SilentDragon Wallet: A very fast messaging, transaction, and asset platform. It allows rapid messaging, transacting and issuance for private or public addresses, on all platforms
- "Hush Explorer". Unknown parameter
- "HushCoin Price Chart- coinmarketcap".
- "Hush". myhush.org. Retrieved 2020-04-30. Unknown parameter
- Leto, Duke (April 20, 2019). "Hush Version 3 Whitepaper Version 1.0" (PDF). Unknown parameter
- Mangal, Aaron (12 February 2018). "Hush, a protocol-level privacy coin and secure messenger based on Zcash". Coin Central. Unknown parameter
- "Hush (HUSH) Mining Profit Calculator - WhatToMine". whattomine.com. Retrieved 2020-04-08.
- "The HUSH Review with Duke Leto". The Daily Chain. 2019-07-26. Retrieved 2020-04-30.
- Stuhlman, Joseph (2017-05-01). "Zdash Rebranding TO HUSH". Steemit. Retrieved 2020-04-30. Unknown parameter
- ftreporter. "Hush Coin – Developed For The People". FT Reporter. Retrieved 2020-04-30.
- Stuhlman, Joseph (2017-05-30). "Effective Immediately, David Mercer (radix42) is the New Lead Dev for HUSH — Steemit". steemit.com. Archived from the original on 2017-05-30. Retrieved 2020-05-01. Unknown parameter
- "HUSH HeadQuarters". Unknown parameter
- "Security: Delayed Proof of Work (dPoW)". Komodo. 2018-07-03. Retrieved 2020-05-01.
- Leto, Duke (Jun 26, 2019). "Release Hush 3.0.0 - MyHush/hush3 - GitHub". GitHub. Retrieved 2020-05-01. Unknown parameter
- "GitHub - MyHush/hush3: HUSH fork of KMD". May 29, 2019. Retrieved 2020-05-01. Unknown parameter
- Zmudzinski, Adrian (2019-09-29). "Zcash Bug Could Reveal Shielded Full Nodes' IP Addresses". Cointelegraph. Retrieved 2020-04-08.
- "CVE - CVE-2019-16930". cve.mitre.org. Retrieved 2020-04-08.
- "Ignore exceptions when deserializing note plaintexts · zcash/zcash@c1fbf8a". GitHub. Retrieved 2020-04-08.
- Leto, Duke. "Zcash Metadata Leakage CVE-2019-16930". duke.leto.net. Retrieved 2020-04-30. Unknown parameter
- "Attacking Zcash Protocol For Fun And Profit". Attacking Zcash For Fun And Profit. Retrieved 2020-08-05.
- Whitepaper link: https://attackingzcash.com/papers/attacking-zcash-for-fun-and-profit.pdf
- Leto, Duke; Developers, The Hush (2020). "Attacking Zcash For Fun And Profit".
- "r/Monero - This new paper shows new attacks and defenses against Zcash Protocol while also describing a new class of attacks that applies to all privacy coins!". reddit. Retrieved 2020-08-05.
- MyHush/sietch, My Hush, 2020-05-06, retrieved 2020-08-05
- "The Anatomy Of A 51% Attack And How You Can Prevent One". Komodo. 2018-07-20. Retrieved 2020-04-08.
- Bester, Nadja (2017-11-29). "Exclusive Interview with Hush Developers (Part I)". Invest In Blockchain. Retrieved 2020-04-29. Unknown parameter
- Mercer, David; Leto, Duke (February 11, 2018). "HushList Protocol Specification Pre-Release Version" (PDF). Retrieved 2020-04-30. Unknown parameter
- "GitHub - MyHush/SilentDragon". GitHub. Retrieved 2020-04-30. Unknown parameter
- Official website
- The Anatomy Of A 51% Attack And How You Can Prevent One
- Security: Delayed Proof of Work (dPoW)
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