{"id":"zcash","title":"Zcash","content":"**Zcash** (ZEC) is a [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) that addresses security concerns surrounding transaction tracking on [Bitcoin](https://iq.wiki/wiki/bitcoin)'s public ledger. By employing the [zk-SNARK](https://iq.wiki/wiki/zk-snark) security protocol, the team behind Zcash focuses on improving user privacy by enabling fully shielded transactions that encrypt sender, recipient, and transaction amounts. [\\[1\\]](#cite-id-ucoo4bdn02) [\\[2\\]](#cite-id-8f4h8dd6yif) [\\[3\\]](#cite-id-nyjf57aagdk)\n\n# Overview\n\nZcash is a [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) focused on privacy. It enables users to conduct transactions without exposing financial details on the public [blockchain](https://iq.wiki/wiki/blockchain). Based on the original [Bitcoin](https://iq.wiki/wiki/bitcoin) codebase, it incorporates zero-knowledge cryptography—specifically [zk-SNARKs](https://iq.wiki/wiki/zk-snark)—to allow transaction validation without revealing the sender, receiver, or amount.\n\nLaunched in 2016, Zcash was developed in response to privacy limitations in [Bitcoin](https://iq.wiki/wiki/bitcoin), evolving from the Zerocash protocol proposed by a group of academic researchers. The Electric Coin Company led its initial development, implementing the Trusted Setup system to generate secure cryptographic parameters. Zcash stands apart from transparent cryptocurrencies by prioritizing user-controlled confidentiality in all transactions. [\\[1\\]](#cite-id-ucoo4bdn02) [\\[3\\]](#cite-id-nyjf57aagdk) [\\[16\\]](#cite-id-Ny6LMzpOJpnugJrp)​\n\n$$widget0 [YOUTUBE@VID](SAbbEJzsJB0)$$\n\n# History\n\nZcash originated in 2014 from research focused on enhancing [Bitcoin’s](https://iq.wiki/wiki/bitcoin) privacy features. A group of scientists—including [Eli Ben-Sasson](https://iq.wiki/wiki/eli-ben-sasson), [Alessandro Chiesa](https://iq.wiki/wiki/alessandro-chiesa), Christina Garman, [Matthew Green](https://iq.wiki/wiki/matthew-green), Ian Miers, Eran Tromer, and Madars Virza—proposed a cryptographic protocol called Zerocash, which evolved from an earlier concept known as Zerocoin. Their work laid the foundation for Zcash, a new [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) emphasizing private transactions. [\\[17\\]](#cite-id-hMbmd6pdsoHTIpel)​\n\nZcash officially launched on October 28, 2016, led by The Zerocoin Company (later renamed Electric Coin Co.), which raised $3 million to support protocol development. Planned upgrades, including Overwinter and Sapling, followed the \"Sprout\" series's initial release. Sapling, activated in October 2018, introduced major efficiency improvements. In 2017, the Zcash [Foundation](https://iq.wiki/wiki/foundation) was established with an initial allocation of 273,000 ZEC, and it later organized the Powers of Tau ceremony—a large multi-party computation event. The project also gained attention through partnerships, such as collaborating with JP Morgan. [\\[4\\]](#cite-id-flf4cbatfbg) [\\[5\\]](#cite-id-trjcavr5rsr)​\n\nBetween 2019 and 2020, the company rebranded as Electric Coin Co. to distinguish itself from the protocol and the Zcash [Foundation](https://iq.wiki/wiki/foundation). During this time, the community discussed governance topics like the continuation of the Founder’s Reward. In early 2019, a previously undisclosed vulnerability in the older [zk-SNARK](https://iq.wiki/wiki/zk-snark) system was revealed, though no exploitation was found. The company began work on a new proving system, Halo, to improve scalability. Network upgrades continued with Blossom in December 2019, Heartwood in July 2020, and Canopy in November 2020—each adding performance and privacy features. [\\[6\\]](#cite-id-8eho744woma) [\\[7\\]](#cite-id-617teywii8w)​\n\nIn 2022, Zcash activated Network Upgrade 5 (NU5), introducing full support for the Orchard shielded protocol and Unified Addresses, further advancing the project's focus on privacy and usability. [\\[8\\]](#cite-id-5zbda78z16)​\n\n$$widget0 [YOUTUBE@VID](D6dY-3x3teM)$$\n\n# Technology\n\nThe Zcash protocol uses ZEC as its unit of account, with the smallest divisible unit, a satoshi, equal to 0.00000001 ZEC. This structure mirrors [Bitcoin’s](https://iq.wiki/wiki/bitcoin) shared origins with the [Bitcoin](https://iq.wiki/wiki/bitcoin) codebase.\n\nZcash’s funding model allocates a portion of [block](https://iq.wiki/wiki/block) rewards to development. Initially, 10% of [block](https://iq.wiki/wiki/block) rewards went to the Founders Reward, benefiting the Electric Coin Co., the Zcash [Foundation](https://iq.wiki/wiki/foundation), and early investors. Following Network Upgrade 4, 8% of rewards are directed to the Dev Fund, managed by a grants committee.\n\nZcash [mining](https://iq.wiki/wiki/mining) began with CPU and GPU accessibility, but as ASIC hardware emerged, it became the dominant method due to greater efficiency. In 2018, the community did not implement ASIC resistance, citing security risks. Leading [mining pools](https://iq.wiki/wiki/mining-pool) include Flypool, Nanopool, and Slushpool. ZIP 213, introduced in the Heartwood upgrade, allows shielded coinbase outputs for miners.\n\nScalability efforts are ongoing, with research into both protocol-level and application-level improvements. Notably, the Halo protocol—proposed by Sean Bowe—introduces recursive [zero-knowledge proofs](https://iq.wiki/wiki/zero-knowledge-proofs-zkps) to improve scalability. Additional proposals, including one by Daira Hopwood, explore sharding to increase transaction throughput. [\\[20\\]](#cite-id-CrLJCIioR4f0sw7H) [\\[21\\]](#cite-id-GS2hgWvsG9QeQiDh)\n\n# Features\n\nZcash provides robust privacy through a combination of several key features. Its privacy technology is trustless, relying on mathematics rather than a central authority. It offers optional privacy, allowing users to choose between public (transparent) and private (shielded) transactions. The network is also designed to be faster and cheaper than [Bitcoin](https://iq.wiki/wiki/bitcoin), with new blocks mined every 75 seconds and low transaction fees. [\\[11\\]](#cite-id-mcmotcrsqqm)\n\n### Addresses\n\nZcash introduces two distinct address types: private (z-addresses) and transparent (t-addresses). While private addresses start with a \"z,\" transparent addresses use a \"t\" prefix. An important feature of ZCash is the interoperability between these two address types, allowing the transfer of funds between them. This capability presents privacy implications as users can shield or deshield transaction information based on their preferences. Most wallets and exchanges predominantly support t-addresses, but support for shielded addresses is accessible through mobile and desktop wallets. [\\[18\\]](#cite-id-HFdhLzMw6y0TywVP)\n\nThe Sapling network upgrade introduced more efficient shielded addresses, and the Network Upgrade 5 (NU5) implemented Unified Addresses (UAs). UAs are a future-proof address format that improves usability and interoperability by merging multiple address types into a single address, simplifying the user experience. [\\[5\\]](#cite-id-trjcavr5rsr) [\\[8\\]](#cite-id-5zbda78z16) [\\[11\\]](#cite-id-mcmotcrsqqm)\n\n$$widget0 [YOUTUBE@VID](Iin9hgJ34v0)$$\n\n### Transactions\n\nZcash transactions come in various types, depending on the involved addresses. Transactions between two transparent addresses (t-addresses) follow a pattern similar to [Bitcoin](https://iq.wiki/wiki/bitcoin), with the sender, receiver, and transaction value publicly visible on the [blockchain](https://iq.wiki/wiki/blockchain). On the other hand, transactions involving shielded addresses encompass shielded (z-to-z), shielding (t-to-z), and deshielding (z-to-t) transactions, with the primary focus on safeguarding z-address privacy. Among these, the most secure transaction is the shielded (z-to-z) variety, where both sender and receiver addresses and the transaction amount are encrypted. All transactions are recorded on the public [blockchain](https://iq.wiki/wiki/blockchain), confirming the occurrence of a transaction and disclosing associated fees. [\\[18\\]](#cite-id-HFdhLzMw6y0TywVP)\n\nUpgrades have significantly improved transaction efficiency and security. The Sapling upgrade enabled the construction of shielded transactions in seconds with only 40 megabytes of memory. [\\[5\\]](#cite-id-trjcavr5rsr) The protocol uses trustless zero-knowledge proofs like Halo to enable private transactions within its Orchard shielded pool, verifying legitimacy without revealing transaction details. [\\[11\\]](#cite-id-mcmotcrsqqm) Network Upgrade 5 (NU5) further enhanced this with a new transaction version format and non-malleable transaction IDs, which commit to all transaction data to increase security. [\\[8\\]](#cite-id-5zbda78z16)\n\n$$widget0 [YOUTUBE@VID](bGmsx4XhV4g)$$\n\n### Viewing Keys\n\nZcash offers a feature allowing owners of z-addresses to share transaction details with trusted third parties by employing viewing keys. These keys grant read-only access to the address, ensuring that third parties can audit transactions without the authority to spend funds. This capability facilitates \"selective disclosure,\" where users control which transactions are revealed. The Sapling upgrade introduced \"full viewing keys,\" which expanded this capability by allowing owners of shielded addresses to view details for both incoming and outgoing transactions without exposing their private spending key. [\\[5\\]](#cite-id-trjcavr5rsr) Viewing keys prove invaluable for compliance with auditing requirements, tax regulations, or [anti-money laundering](https://iq.wiki/wiki/anti-money-laundering-aml) protocols, enabling participants to adhere to such standards while maintaining their privacy. [\\[18\\]](#cite-id-HFdhLzMw6y0TywVP)\n\n$$widget0 [YOUTUBE@VID](NXjK_Ms7D5U)$$\n\n# Zodl Wallet (Formerly Zashi)\n\n**Zodl** (formerly Zashi) is a self-custody, shielded wallet designed exclusively for private Zcash (ZEC) transactions. Originally developed by the Electric Coin Company, its development is now being accelerated by the Zcash Open Development Lab (ZODL). It enables users to send, receive, and spend ZEC without intermediaries or surveillance.\n\nFocused on privacy, Zodl supports only shielded ZEC payments to ensure strong financial confidentiality. It gives users full control of their funds and private keys, emphasizing security and financial sovereignty. The wallet features a user-friendly interface, ongoing improvements, and integrations such as [Coinbase](https://iq.wiki/wiki/coinbase) for easy ZEC purchases and Flexa for spending at thousands of retail locations. Zodl is designed to simplify onboarding for new users, providing a straightforward way to access private digital payments. [\\[12\\]](#cite-id-L9nfFBGBYJ) [\\[19\\]](#cite-id-43aKHk9Kk9zF1SyY)\n\n$$widget0 [YOUTUBE@VID](G92zBIr-Wms)$$\n\n# ZEC\n\nThe ZEC Token is the Zcash network's native [cryptocurrency](https://iq.wiki/wiki/cryptocurrency), which manages all transactions and mining rewards. The total supply of ZEC is capped at 21 million, with 80% of [block rewards](https://iq.wiki/wiki/block-reward) allocated to miners and the remaining 20% distributed to the development fund. Similar to [Bitcoin](https://iq.wiki/wiki/bitcoin), [mining](https://iq.wiki/wiki/mining) rewards are scheduled to be halved every four years, as a means of controlling inflation. [\\[9\\]](#cite-id-fy5y2neh48e)[\\[10\\]](#cite-id-lj3ycxbicvj)[\\[11\\]](#cite-id-mcmotcrsqqm)\n\n# ZecHub\n\nZecHub is a decentralized, open-source education platform focused on the Zcash ecosystem. It hosts a range of resources—including newsletters, blogs, and tutorials—created and maintained by a global community of contributors. The platform is designed to support collaborative content creation, validation, and distribution, aiming to strengthen Zcash knowledge and engagement through community-led educational initiatives. [\\[14\\]](#cite-id-NfjWuqoYFj) [\\[15\\]](#cite-id-EUKPzHDzdE)\n\n$$widget0 [YOUTUBE@VID](f7fw-pXT5kE)$$\n\n# Zcash Open Development Lab (Zodl)\n\nZcash Open Development Lab (Zodl) is a development group formed by the former core engineering and product team of the Electric Coin Company (ECC), including former CEO [Josh Swihart](https://iq.wiki/wiki/josh-swihart). In March 2026, the lab announced it had raised over $25 million in a seed funding round. The capital is intended to expand the development of the Zcash protocol and accelerate the creation of its privacy-focused, self-custodial mobile wallet, Zodl. [\\[19\\]](#cite-id-43aKHk9Kk9zF1SyY)\n\n# NEAR Integration\n\nZcash has been integrated into [NEAR Protocol's](https://iq.wiki/wiki/near-protocol) [Intents](https://iq.wiki/wiki/near-intents) stack, enabling cross-chain decentralized trading of ZEC with assets such as [BTC](https://iq.wiki/wiki/bitcoin-btc), [ETH](https://iq.wiki/wiki/ether-eth), [NEAR](https://iq.wiki/wiki/near-token), and [SOL](https://iq.wiki/wiki/solana-sol). This integration allows users to perform permissionless swaps without [KYC](https://iq.wiki/wiki/know-your-customer-kyc), using [NEAR’s](https://iq.wiki/wiki/near-protocol) infrastructure to abstract away [blockchain](https://iq.wiki/wiki/blockchain)-specific complexities and reduce reliance on [centralized exchanges](https://iq.wiki/wiki/cex-centralized-exchange).\n\nThrough this setup, ZEC holders can transfer shielded assets from Zcash’s Orchard pool to a transparent address managed by [NEAR](https://iq.wiki/wiki/near-protocol) [smart contracts](https://iq.wiki/wiki/smart-contract), preserving privacy while enabling cross-chain transactions. The integration leverages Chain Signatures and opens up possibilities for future developments like shielded swaps using Zcash Shielded Assets (ZSAs). [NEAR](https://iq.wiki/wiki/near-protocol) users gain seamless access to ZEC, which retains its privacy features post-swap, aligning with the project’s focus on financial confidentiality and decentralized self-custody. 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[[11]](#cite-id-mcmotcrsqqm)\",\"Expanded the 'Addresses' subsection with details on the Sapling upgrade and Unified Addresses (UAs) from Network Upgrade 5. [[5]](#cite-id-trjcavr5rsr) [[8]](#cite-id-5zbda78z16) [[11]](#cite-id-mcmotcrsqqm)\",\"Expanded the 'Transactions' subsection to include information on performance upgrades like Sapling and security enhancements like Halo proofs. [[5]](#cite-id-trjcavr5rsr) [[8]](#cite-id-5zbda78z16) [[11]](#cite-id-mcmotcrsqqm)\",\"Expanded the 'Viewing Keys' subsection with details on 'full viewing keys' introduced in the Sapling upgrade. [[5]](#cite-id-trjcavr5rsr) [[18]](#cite-id-HFdhLzMw6y0TywVP)\"]},{\"title\":\"Zodl Wallet (Formerly Zashi)\",\"subtitle\":\"The 'Zashi Wallet' section was renamed and its content was updated.\",\"variant\":\"modified\",\"changeCount\":1,\"changes\":[\"This section, formerly named 'Zashi Wallet', was updated to reflect that its development is now being accelerated by the Zcash Open Development Lab (ZODL). [[12]](#cite-id-L9nfFBGBYJ) [[19]](#cite-id-43aKHk9Kk9zF1SyY)\"]},{\"title\":\"Zcash Open Development Lab (Zodl)\",\"subtitle\":\"A new section was added for the Zcash Open Development Lab.\",\"variant\":\"added\",\"changeCount\":1,\"changes\":[\"Added a new section describing the Zcash Open Development Lab (Zodl), its formation by former ECC members, and its recent $25 million seed funding round. [[19]](#cite-id-43aKHk9Kk9zF1SyY)\"]}]}]}"}