A concise, neutral reference for the digital side of commodities — blockchain fundamentals, token standards, DeFi and stablecoins, real-world asset (RWA) tokenization, and the regulatory frameworks that govern them in Hong Kong and internationally. Every term cites a primary source: regulator publications, EIP standards, BIS/IOSCO/FATF/FSB documents, or official whitepapers.
12 terms
A data structure that groups a set of transactions together with a cryptographic hash of the previous block, a nonce, and a Merkle root. Each node collects new transactions into a block; once a proof-of-work or validator attestation is found, the block is broadcast to the network and, if valid, appended to the chain.
Source: Bitcoin: A Peer-to-Peer Electronic Cash System, Satoshi Nakamoto (2008), Sections 3–5
A distributed digital ledger of cryptographically signed transactions grouped into blocks. Each block is cryptographically linked to the previous one after validation and a consensus decision, making the record tamper-evident and tamper-resistant. New blocks are replicated across network copies and conflicts resolved automatically using established rules.
Source: NIST IR 8202 Blockchain Technology Overview (2018), Appendix B
A process to achieve agreement within a distributed system on the valid state of the ledger, also referred to as a consensus algorithm or consensus model. MiCA (EU) 2023/1114 defines it as the rules and procedures by which agreement is reached among DLT network nodes that a transaction is validated.
Source: NIST IR 8202 Blockchain Technology Overview (2018), Appendix B; EU Regulation 2023/1114 (MiCA) Article 3(1)(3)
A property of confirmed blocks indicating they cannot be reverted unless an attacker destroys at least one-third of total staked ETH. In Ethereum's Gasper protocol, a block is finalized after two-thirds of total staked ETH votes to justify consecutive checkpoint pairs; reverting a finalized block would require burning billions of dollars of staked ether.
The fundamental network cost unit paid to execute computation on the Ethereum Virtual Machine, denominated in wei per unit of gas. Since EIP-1559 (London hard fork), each transaction pays a burned base fee plus an optional priority fee to validators; the total fee equals (base fee + priority fee) multiplied by gas consumed.
Source: Ethereum Yellow Paper (Wood, 2022), Section 5 and Appendix G
An iterative, one-way function that processes a message of arbitrary length to produce a fixed-length condensed output called a message digest. NIST FIPS 180-4 specifies SHA-1 through SHA-512: it is computationally infeasible to find a message corresponding to a given digest, or two messages producing the same digest, ensuring data integrity.
Source: NIST FIPS 180-4 Secure Hash Standard (2015), Section 1
Mainnet is the primary public Ethereum production blockchain where actual-value transactions occur on the distributed ledger. Testnets are public networks used by developers to test protocol upgrades and smart contracts in a production-like environment before Mainnet deployment; testnet ETH carries no real monetary value.
A binary tree structure in which each leaf node is a cryptographic hash of a data item, and each internal node is a hash of its two children, culminating in a single root hash. Nakamoto (2008) describes transactions being hashed in a Merkle Tree with only the root included in the block's hash, enabling efficient and secure verification of large datasets.
Source: Bitcoin: A Peer-to-Peer Electronic Cash System, Satoshi Nakamoto (2008), Section 7; RFC 6962 Certificate Transparency, Section 2.1
Any instance of Ethereum client software connected to other computers running the same software, forming a peer-to-peer network. A full node downloads and verifies block bodies and state data block-by-block, participates in block validation, and serves data on request. NIST IR 8202 defines a node as an individual system within a blockchain network.
Source: Ethereum.org, Nodes and Clients documentation; NIST IR 8202 (2018), Appendix B
A consensus mechanism in which validators explicitly stake capital in the form of cryptocurrency into a smart contract, providing economic skin-in-the-game that can be destroyed if they act dishonestly. In Ethereum, validators deposit 32 ETH and are randomly selected to propose blocks and vote via attestations; dishonest behavior triggers slashing of staked funds.
A consensus mechanism in which network nodes compete to find a nonce value that, when hashed with block data (e.g., using SHA-256), produces a hash beginning with a required number of zero bits. The average work required is exponential in the number of zero bits, but verification requires only a single hash, making forgery computationally prohibitive.
Source: Bitcoin: A Peer-to-Peer Electronic Cash System, Satoshi Nakamoto (2008), Section 4
A participant in Ethereum's proof-of-stake network who deposits 32 ETH into the deposit contract, runs execution and consensus client software, proposes new blocks, and sends attestations (votes) for blocks proposed by others. BCBS SCO60 defines validators as entities that commit transaction blocks to the distributed ledger network.
Source: Ethereum Consensus Specifications, Phase 0 Beacon Chain (github.com/ethereum/consensus-specs); BCBS SCO60 Prudential Treatment of Cryptoasset Exposures, para. 131
12 terms
A protocol enabling transfer of assets or data between two distinct blockchain networks by locking assets on the source chain and minting equivalent representations on the destination chain. IOSCO (FR/2024) identifies cross-chain bridges as critical DeFi infrastructure components that have been exploited for over $3 billion in losses, highlighting significant operational risks.
Source: IOSCO Policy Recommendations for Decentralized Finance (DeFi), FR/IOSCOPD754 (2024)
A smart contract interface that represents any number of fungible and non-fungible token types within a single contract, where each token ID configures its own metadata, supply, and attributes. Unlike ERC-20 and ERC-721, it allows batch transfers of multiple token types in one transaction, reducing gas costs and contract deployment redundancy.
Source: EIP-1155: Multi Token Standard, Witek Radomski et al.
A standard API for fungible tokens within Ethereum smart contracts, providing basic functions for transferring tokens and allowing third-party spending approvals. Introduced in EIP-20 (2015), it enables any ERC-20 token to be re-used by other applications from wallets to decentralized exchanges without bespoke integration.
Source: EIP-20: Token Standard, Fabian Vogelsteller & Vitalik Buterin (19 Nov 2015)
An institutional-grade security token standard (Token for Regulated EXchanges) built on ERC-20 that adds an on-chain identity registry and compliance module. Transfers are conditional: receivers must be whitelisted and verified via signed attestations from trusted claim issuers, enabling fully compliant issuance and lifecycle management of security tokens for regulated markets.
Source: EIP-3643: T-REX — Token for Regulated EXchanges (9 Jul 2021)
A standard API extension of ERC-20 for tokenized vaults representing shares of a single underlying ERC-20 token, providing functions for depositing, withdrawing, and reading balances. It standardizes yield-bearing vault integrations across lending markets and aggregators, reducing error-prone per-protocol adapter implementations.
Source: EIP-4626: Tokenized Vaults, Joey Santoro et al. (22 Dec 2021)
A standard API for non-fungible tokens (NFTs) within Ethereum smart contracts, enabling tracking and transfer of assets that are each uniquely identified by a uint256 tokenId within the contract. Every NFT is distinguishable and must be tracked separately; it can represent ownership of physical property, virtual collectibles, or other unique assets.
Source: EIP-721: Non-Fungible Token Standard, William Entriken et al. (24 Jan 2018)
A hot wallet is connected to the internet, enabling fast transaction signing but exposing private keys to online threats. A cold wallet stores private keys offline (e.g., hardware devices or paper), significantly reducing attack surface for key compromise. NIST IR 8202 notes that node and key security are critical operational considerations for blockchain deployments.
Source: NIST IR 8202 Blockchain Technology Overview (2018); EU Regulation 2023/1114 (MiCA), Article 3(1)(17) on custody of private cryptographic keys
Layer 1 (L1) is the base blockchain providing settlement finality and security (e.g., Ethereum Mainnet). Layer 2 (L2) protocols are built on top of L1 to extend throughput and reduce costs, processing transactions off-chain while posting compressed data or proofs to L1 for finality. Ethereum's docs describe L2s as hundreds of blockchains built on top of Ethereum.
Source: Ethereum.org, Layer 2 documentation; Ethereum.org, Networks
A cryptographic scheme requiring M-of-N private key signatures to authorize a transaction, preventing single-point-of-failure in key custody. In on-chain contexts, multisig smart contracts (such as Gnosis Safe) implement threshold approval logic directly on the blockchain, enabling institutional-grade custody and governance.
Source: EIP-3643, Agent Role Interface (multi-party control model); Bitcoin protocol multi-signature (P2SH) described in Nakamoto (2008)
A Layer 2 scaling technique that executes transactions off-chain and posts batched transaction data or proofs to Ethereum Mainnet. Optimistic rollups assume validity and rely on fraud proofs during a challenge window; ZK-rollups (zero-knowledge rollups) submit cryptographic validity proofs with each batch, enabling faster finality on L1.
Source: Ethereum.org, Optimistic Rollups; Ethereum.org, Zero-Knowledge Rollups
A group of 12–24 human-readable words generated from initial entropy (128–256 bits) and used to derive deterministic wallet keys via the PBKDF2 function with HMAC-SHA512. Specified in BIP-39 (2013), the seed phrase provides a human-transcribable backup for all keys derived from a hierarchical deterministic wallet.
Source: BIP-0039: Mnemonic code for generating deterministic keys, Trezor / Marek Palatinus et al. (2013)
Software or hardware that manages private cryptographic keys used to sign and authorize blockchain transactions, thereby controlling access to on-chain assets. MiCA Article 3(1)(17) describes custody wallets as safekeeping or controlling, on behalf of clients, crypto-assets or the means of access such as private cryptographic keys.
Source: EU Regulation 2023/1114 (MiCA), Article 3(1)(17); Ethereum.org, Wallets
10 terms
An on-chain pricing algorithm, typically using a constant-product formula (e.g., x·y=k), that enables continuous liquidity provision without a traditional order book. Uniswap v2 describes it as an automated liquidity protocol based on a constant product formula, where pooled reserves of two assets are maintained and any trade adjusts the ratio to preserve the invariant.
Source: Uniswap v2 Core Whitepaper (2020); IOSCO FR/IOSCOPD754 (2024), Key Definitions
Financial services provided by centralized intermediaries—such as licensed exchanges, custodians, and brokers—that maintain custody of client assets, operate order books, and execute transactions on clients' behalf. Unlike DeFi, CeFi platforms are subject to licensing, AML/CFT obligations, and conduct-of-business rules as specified in frameworks such as IOSCO's Policy Recommendations for Crypto and Digital Asset Markets (FR11/2023).
Source: IOSCO Policy Recommendations for Crypto and Digital Asset Markets, FR/IOSCOPD734 (2023), Scope
A decentralized, collateral-backed stablecoin generated by depositing approved digital assets into MakerDAO (Sky Protocol) Vaults, with a target price of 1 USD. Every DAI in circulation is directly backed by excess collateral; undercollateralized positions are automatically liquidated via on-chain auctions, and the Dai Savings Rate allows holders to earn yield.
A competitive, contestable, composable, and non-custodial financial ecosystem built on smart contracts running on a distributed ledger network, requiring no central organization to operate and providing no safety net for users. Per BIS Working Paper No. 1066 (2023), it consists of financial protocols implemented as smart contracts that automatically manage transactions without banks or traditional intermediaries.
Source: BIS Working Paper No. 1066, 'The Technology of Decentralized Finance (DeFi)' (2023), Definition 1
A non-custodial protocol running on smart contracts that facilitates peer-to-peer trading of crypto-assets using either an order book or an automated market maker (AMM) with liquidity pools, without a central operator. IOSCO (FR/IOSCOPD754, 2024) describes DEX protocols as DLT-based components enabling on-chain trading through order books or AMMs.
Source: IOSCO Policy Recommendations for Decentralized Finance (DeFi), FR/IOSCOPD754 (2024), Key Definitions
A smart contract holding reserves of two or more tokens contributed by liquidity providers, enabling AMM-based trading without a centralized counterparty. Uniswap v2 describes pooled reserves that maintain the constant-product invariant; providers receive pool tokens representing their share and earn fees proportional to trading volume.
A category of crypto-asset designed to maintain a stable value by tying its price to one or more other assets, such as sovereign currencies. The FSB defines stablecoins as an attempt to address high volatility of traditional crypto-assets. The BCBS (SCO60) further defines them as cryptoassets that aim to maintain a stable value relative to a specified asset or a pool or basket of assets.
Source: FSB, Regulation, Supervision and Oversight of Global Stablecoin Arrangements (Oct 2020); BCBS SCO60, para. 131
A fully reserved, regulated stablecoin issued by Circle, backed 100% by highly liquid cash and cash-equivalent assets (primarily the Circle Reserve Fund, an SEC-registered 2a-7 government money market fund custodied at BNY Mellon and managed by BlackRock) and redeemable 1:1 for US dollars. Circle publishes monthly reserve attestations by a Big Four accounting firm.
Source: Circle, USDC product page
A fiat-referenced stablecoin issued by Tether Limited, pegged to the US dollar and backed by a reserve of assets including cash, cash equivalents, and other investments. Tether publishes quarterly reserve attestations; USDT operates on multiple blockchains including Ethereum (as an ERC-20 token) and is the largest stablecoin by market capitalisation.
Source: Tether Transparency & Attestations page; FSB Global Stablecoin Arrangements (2020)
An ERC-20 token on Ethereum backed 1:1 by a native asset on another blockchain (e.g., WBTC backed by Bitcoin), enabling interoperability between networks. The WBTC whitepaper describes custodians holding the native asset while merchants initiate minting or burning; proof of reserves is posted on-chain and verified via quarterly audits.
10 terms
An independent third-party examination—typically by a registered public accounting firm—that confirms the existence and value of reserve assets backing a token at a specific date. Circle publishes monthly USDC reserve attestations by a Big Four firm; Paxos conducts monthly attestations confirming PAXG tokens correspond 1:1 with vault-held gold. IOSCO Recommendation 15 requires annual independent audits of client asset reconciliations.
Source: Circle USDC page; PAX Gold Whitepaper (2019); IOSCO FR/IOSCOPD734, Rec. 15
A securities settlement mechanism that links a securities transfer and a funds transfer such that delivery occurs if and only if the corresponding payment occurs, eliminating principal risk in securities transactions. Defined in the CPMI-IOSCO Principles for Financial Market Infrastructures (PFMI, 2012), DvP is a core requirement for systemically important central securities depositories.
Source: CPMI-IOSCO, Principles for Financial Market Infrastructures (PFMI, April 2012), Annex D, p.152
A digital token whose underlying collateral consists of gold bars meeting the London Bullion Market Association (LBMA) Good Delivery standard: a minimum of 99.5% fineness, weight between 350 and 430 fine troy ounces, and unique markings for serial number, refiner, fineness, and year of manufacture. Paxos describes PAXG as backed by LBMA-accredited London Good Delivery gold bars.
Source: PAX Gold Whitepaper, Paxos Trust Company (Sep 2019); LBMA Good Delivery Rules
A tokenisation model in which physically indistinguishable units of a commodity (e.g., gold or carbon credits) are tracked across a shared pool rather than allocated to specific identifiable bars or lots. The HKMA Project Ensemble Sandbox explores such models; ISEAL standards address mass-balance chain-of-custody for certified commodity flows where physical segregation is impractical.
Source: HKMA Project Ensemble Sandbox Press Release, 28 August 2024
An ERC-20 token issued by Paxos Trust Company (regulated by NYDFS) in which each token represents one fine troy ounce of physical gold from a specific serialized LBMA Good Delivery bar held in Brink's bullion vaults in London. Monthly third-party attestations confirm 1:1 correspondence between outstanding tokens and vault-held gold; holders with 430+ oz may redeem for physical delivery.
A digital token whose value is collateralized by a tangible real-world asset held by a qualified custodian, with the token representing a claim to that specific asset. BCBS SCO60 defines tokenised traditional assets as dematerialised securities or assets issued through DLT where the token holder retains the same legal rights as holders of the traditional form of the asset.
Source: BCBS SCO60, Prudential Treatment of Cryptoasset Exposures (2022), para. 131
An HKMA-led initiative launched in March 2024 to explore innovative financial market infrastructure for seamless interbank settlement of tokenised money using wholesale central bank digital currency (wCBDC). The Project Ensemble Sandbox, launched August 2024, enables end-to-end testing of tokenised asset transactions—covering fixed income, liquidity management, green finance, and trade finance—with participating banks, the SFC, and the BIS Innovation Hub Hong Kong Centre.
A collaborative initiative led by the Monetary Authority of Singapore (MAS) with major financial institutions to test and develop secure, efficient use cases for asset tokenisation across the capital markets value chain, including listing, distribution, trading, settlement, and asset servicing. Launched in 2022, it has conducted industry pilots in tokenised bonds, funds, and repo with partners such as DBS, J.P. Morgan, and others under a live pilot model.
Source: MAS Project Guardian page; J.P. Morgan / Kinexys Project Guardian summary
The contractual and operational process by which a token holder exchanges their token for the underlying real-world asset or its fiat equivalent. For PAXG, holders with 430+ oz may redeem for full-sized LBMA Good Delivery gold bars, or convert smaller amounts to unallocated gold or USD via Paxos. BCBS SCO60 classification condition 2 requires full redeemability within five calendar days.
Source: PAX Gold Whitepaper, Paxos (2019), Redemption section; BCBS SCO60, para. SCO60.14–15
A digital token issued by TG Commodities S.A. de C.V. in which each XAUt represents one fine troy ounce of physical gold stored in Swiss vaults. Unlike PAXG, XAUT is redeemable for physical gold bars delivered to any address in Switzerland; real-time gold allocation can be verified on the Tether Gold website using an Ethereum address; no custodian storage fee is charged.
Source: Tether Gold product page
16 terms
A Basel Committee standard effective 1 January 2025 that classifies bank cryptoasset exposures into Group 1 (tokenised traditional assets and qualifying stablecoins, subject to existing Basel risk weights) and Group 2 (all other cryptoassets, subject to a conservative 1250% risk weight for Group 2b). Classification requires ongoing bank assessment and supervisor notification, with Group 1b stablecoins meeting strict redemption, governance, and reserve quality tests.
Source: BCBS, Prudential Treatment of Cryptoasset Exposures (SCO60, December 2022)
The CPMI's 2018 report defined CBDC as a digital form of central bank money—a central bank liability denominated in an existing unit of account serving as medium of exchange and store of value—distinct from reserves or settlement balances. The report analysed wholesale CBDC (for financial institutions) and general-purpose CBDC (widely accessible), highlighting financial stability, AML/CFT, and monetary policy implications.
Source: BIS/CPMI, 'Central Bank Digital Currencies' (March 2018), CPMI Paper No. 174
The U.S. Commodity Futures Trading Commission (CFTC) asserts jurisdiction over digital assets—most notably Bitcoin and Ether—as commodities under the Commodity Exchange Act, enabling it to regulate derivatives markets and take enforcement action for fraud and manipulation in spot markets for those assets. IOSCO Recommendation 1 notes that digital assets may substitute for regulated instruments, requiring jurisdictions to assess applicable frameworks.
An extension of FATF Recommendation 16 (wire transfer transparency) to virtual asset transfers, requiring originating VASPs to obtain and transmit accurate originator and beneficiary information to the beneficiary VASP for transfers at or above USD/EUR 1,000. Updated FATF guidance (2021) defines VASPs and mandates that all virtual asset transfers be treated as cross-border, with information submitted immediately and securely.
Source: FATF, Updated Guidance for a Risk-Based Approach for Virtual Assets and VASPs (2021), Annex A and INR.15 para. 7(b); FATF Recommendations 2012 (updated), Recommendation 16
A framework published by the Financial Stability Board in July 2023 comprising two sets of high-level recommendations—one for general crypto-asset activities and markets, and one for global stablecoin arrangements—applying the core principle of 'same activity, same risk, same regulation.' It excludes CBDCs and coordinates with sectoral standard-setters including IOSCO, BCBS, CPMI, and FATF.
Source: FSB, Global Regulatory Framework for Crypto-Asset Activities (July 2023)
HKEX's digital asset infrastructure includes the HKEX Virtual Asset Index Series (launched November 2024), the first EU Benchmarks Regulation (BMR)-compliant virtual asset index series developed in Hong Kong, providing real-time 24-hour volume-weighted reference prices for Bitcoin and Ether for the Asian time zone. HKEX is also developing an Integrated Fund Platform using DLT and smart contracts for ETP creation and redemption.
Source: HKEX News Release, 28 October 2024; HKEX ETP Digitalisation, 5 November 2024
Legislation enacted by the Hong Kong Legislative Council on 21 May 2025 (effective 1 August 2025) establishing a licensing regime administered by the HKMA for issuers of fiat-referenced stablecoins (FRS) in Hong Kong. Licensees must maintain 100% reserve assets backing all outstanding FRS, provide par-value redemption within one business day, and hold minimum paid-up capital of HK$25 million.
Source: Stablecoins Ordinance (Cap. 656), HK Government Gazette Notice, 6 June 2025; HKMA Regulatory Regime for Stablecoin Issuers article (Q3 2024)
A test derived from the U.S. Supreme Court's decision in SEC v. W.J. Howey Co. (1946) that defines an investment contract as (i) an investment of money (ii) in a common enterprise (iii) with a reasonable expectation of profits (iv) derived from the efforts of others. The SEC's 2019 Framework for Investment Contract Analysis of Digital Assets applies this four-prong test to determine whether a digital asset constitutes a security.
Source: SEC, Framework for 'Investment Contract' Analysis of Digital Assets (3 April 2019)
Eighteen principles-based, outcomes-focused policy recommendations published by IOSCO in November 2023, applying the principle of 'same activity, same risk, same regulatory outcome' to crypto-asset service providers (CASPs) across governance, order handling, listing, market abuse, custody, and retail distribution. They provide a benchmark for cross-border supervisory cooperation and enforcement among IOSCO member regulators.
Source: IOSCO, Policy Recommendations for Crypto and Digital Asset Markets, FR/IOSCOPD734 (November 2023)
Singapore legislation (No. 2 of 2019) that provides for the licensing and regulation of payment service providers, including digital payment token (DPT) services such as facilitating exchange of DPTs for fiat or other DPTs. It establishes a tiered licensing framework and subjects DPT service providers to AML/CFT, technology risk management, and consumer protection requirements administered by MAS.
Source: Singapore Statutes Online, Payment Services Act 2019 (Cap. PSA)
EU Regulation 2023/1114 of 31 May 2023, which establishes uniform requirements for the offer, admission to trading, and ongoing compliance of crypto-assets (including asset-referenced tokens and e-money tokens) across the EU, and sets authorisation and conduct standards for crypto-asset service providers (CASPs). It defines a crypto-asset as a digital representation of a value or right that can be transferred and stored electronically using DLT.
Source: Regulation (EU) 2023/1114 (MiCA), OJ L 150, 9 June 2023, Articles 1–3
A multi-central bank digital currency platform built on a bespoke distributed ledger (the mBridge Ledger) by the HKMA, Bank of Thailand, People's Bank of China, Central Bank of UAE, and BIS Innovation Hub, enabling real-time peer-to-peer cross-border payments and FX transactions using CBDCs. It reached the minimum viable product stage in mid-2024; the BIS transferred stewardship to partner central banks in October 2024.
A regulated activity under Schedule 5 to the Securities and Futures Ordinance (Cap. 571) covering dealing in securities, including tokenised securities. Virtual asset trading platforms that list security tokens must hold a Type 1 licence; the SFC confirmed this requirement in its 2019 conceptual framework and subsequent licensing circulars.
Source: SFC, Do You Need a Licence or Registration?; SFC FAQ on Regulated Activities (PDF)
A regulated activity under Schedule 5 to the Securities and Futures Ordinance (Cap. 571) covering the provision of automated trading services (ATS), including operation of electronic platforms that match securities orders. Centralised virtual asset trading platforms that offer security token trading are required to hold both Type 1 and Type 7 licences under the SFC's regulatory framework.
Source: SFC, Do You Need a Licence or Registration?; SFC FAQ on Regulated Activities (PDF)
A regulated activity under Schedule 5 to the Securities and Futures Ordinance (Cap. 571) covering discretionary management of portfolios of securities or futures contracts for clients. Fund managers investing in digital assets classified as securities, including tokenised funds, must hold a Type 9 licence; the SFC expects licensees to exercise discretionary investment authority.
Source: SFC, Do You Need a Licence or Registration?; SFC FAQ on Regulated Activities (PDF)
A licence issued by the Securities and Futures Commission (SFC) of Hong Kong, mandatory from 1 June 2023 under the Anti-Money Laundering and Counter-Terrorist Financing Ordinance (AMLO, Cap. 615) as amended in December 2022, for any entity operating a centralised virtual asset trading platform serving Hong Kong clients. Licensed VATPs must meet AML/CFT, custody, and conduct requirements; applicants require at least two SFC-approved Responsible Officers.
Source: SFC, Licensing of Virtual Asset Service Providers; AMLO Amendment 2022, Cap. 615
Try another term, or browse by category above.