> For the complete documentation index, see [llms.txt](https://docs.dcn.foundation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dcn.foundation/part-x-reference/10-reference/23-glossary.md). # 23. Glossary > *This glossary defines the key technical, architectural, and business terms used throughout the Digital Crypto Note (DCN) Vision Paper. It serves as a common vocabulary for developers, manufacturers, publishers, enterprises, governments, researchers, and ecosystem participants.* *** ## Introduction The Digital Crypto Note ecosystem combines concepts from multiple industries, including: * Blockchain * Cryptography * Secure Hardware * Digital Identity * Payment Systems * NFC Technology * Enterprise Architecture * Public Key Infrastructure (PKI) * Manufacturing * Open Standards To ensure consistency throughout the specification, the following glossary defines the meaning of important terms used across the DCN ecosystem. Unless otherwise stated, these definitions apply throughout the entire DCN Standard. *** ## A ### API (Application Programming Interface) A standardized interface that allows software applications to communicate with DCN services such as Wallets, Publisher Platforms, Verification Services, and Blockchain Adapters. *** ### Asset Profile A predefined behavioral model describing how a Physical Digital Asset operates. Examples include: * DCN-S (Stored Value) * DCN-R (Reloadable) * DCN-P (Programmable) * DCN-C (Collectible) *** ### Authentication The process of verifying the identity and authenticity of a Physical Digital Asset, Wallet, Merchant, or Publisher using cryptographic methods. *** ## B ### Blockchain Adapter A standardized software component that connects the DCN ecosystem to a specific blockchain network while exposing a common interface to applications. *** ### Blockchain Network A distributed ledger system that records ownership, transactions, and smart contract operations. Examples include Ethereum, Bitcoin, TON, Solana, Polygon, and future supported networks. *** ## C ### Certificate A digitally signed credential used to establish trust between ecosystem participants. Certificates may identify: * Devices * Publishers * Manufacturers * Wallets * Verification Services *** ### Certificate Authority (CA) An organization responsible for issuing, managing, and revoking trusted digital certificates. *** ### Certification The formal process used to verify that an implementation complies with the DCN Standard. *** ### Companion Wallet The official or third-party wallet application that interacts with Physical Digital Assets for balance management, ownership verification, recovery, payments, and lifecycle operations. *** ### Cryptography Mathematical techniques used to secure communication, authenticate devices, and protect digital assets. *** ## D ### DCN Digital Crypto Note. The open standard for creating and managing trusted Physical Digital Assets. *** ### DCN Foundation The independent organization responsible for governing, maintaining, and evolving the DCN Standard. *** ### DCN-C Collectible Asset Profile supporting authenticated limited-edition Physical Digital Assets. *** ### DCN-P Programmable Asset Profile supporting configurable business rules. *** ### DCN-R Reloadable Asset Profile supporting reusable balances. *** ### DCN-S Stored Value Asset Profile supporting fixed-value Physical Digital Assets. *** ### DID (Decentralized Identifier) A globally unique identifier designed for decentralized identity systems. *** ### Digital Asset A cryptographically secured asset represented digitally on a blockchain or compatible distributed system. *** ### Digital Crypto Note A Physical Digital Asset implemented according to the DCN Standard. *** ### Digital Identity A trusted digital representation of an individual, organization, device, or system. *** ## E ### Ecosystem The complete collection of organizations, products, services, and participants operating under the DCN Standard. *** ### Enterprise A commercial or public-sector organization using the DCN Standard to deliver products or services. *** ## F ### Foundation See **DCN Foundation**. *** ## G ### Governance The processes through which the DCN Standard evolves, including proposals, reviews, certification, and version management. *** ## H ### Hardware Root of Trust A hardware-based security foundation that establishes device authenticity and protects cryptographic operations. *** ## I ### Identity Authority An organization authorized to issue trusted digital identities. *** ### Interoperability The ability of independently developed implementations to communicate and function together according to the DCN Standard. *** ### Issuer An organization responsible for issuing Physical Digital Assets. Within the DCN ecosystem, this role is generally referred to as the **Publisher**. *** ## L ### Lifecycle The complete sequence of states experienced by a Physical Digital Asset, including issuance, activation, transfer, suspension, recovery, revocation, and retirement. *** ## M ### Merchant An organization or individual that accepts Physical Digital Assets for payments, authentication, or service access. *** ### Multi-Chain The ability to support multiple blockchain networks through standardized Blockchain Adapters. *** ## N ### NFC (Near Field Communication) A short-range wireless communication technology used for interaction between Physical Digital Assets and compatible readers or mobile devices. *** ## O ### Open Standard A publicly documented specification that enables independent organizations to build interoperable implementations. *** ### Ownership The cryptographically verifiable relationship between a Physical Digital Asset and its current holder. *** ## P ### Payment Protocol The standardized sequence of messages used to authorize and complete a payment transaction. *** ### Physical Digital Asset (PDA) A secure physical object that represents and interacts with digital ownership through the DCN Standard. Examples include: * Digital Crypto Notes * Smart Cards * Identity Cards * Collectibles * Secure NFC Devices *** ### PKI (Public Key Infrastructure) A framework used to manage cryptographic identities, certificates, trust chains, and authentication. *** ### Provisioning The secure manufacturing process through which a device receives cryptographic keys, certificates, identifiers, and configuration before deployment. *** ### Publisher An organization that issues and manages Physical Digital Assets. Publishers define product policies, lifecycle rules, and business logic. *** ### Publisher Platform The software platform responsible for issuing, managing, and maintaining Physical Digital Assets. *** ## Q ### QR Code A two-dimensional barcode commonly used for payments and identity verification. Within the DCN ecosystem, NFC interactions provide an alternative user experience while QR support may remain available where appropriate. *** ## R ### Recovery The controlled process of restoring access to a Physical Digital Asset according to Publisher policy. *** ### Revocation The process of permanently or temporarily invalidating certificates, credentials, or Physical Digital Assets. *** ## S ### SDK (Software Development Kit) A collection of software libraries, APIs, documentation, and tools used to build applications compatible with the DCN Standard. *** ### Secure Element (SE) A tamper-resistant hardware component responsible for protecting cryptographic keys and executing secure operations. *** ### Secure Messaging Encrypted communication between trusted devices following successful authentication. *** ### Smart Account A programmable blockchain account supporting policy-based asset management and advanced authorization. *** ### Stablecoin Note A Physical Digital Asset representing a blockchain-based stablecoin. *** ## T ### Tokenization The process of representing an asset or right as a digital token on a blockchain or compatible distributed ledger. *** ### Trust Chain The sequence of certificates and cryptographic relationships used to establish authenticity. *** ## U ### User Permissions Configurable policies controlling how a Physical Digital Asset may be used, transferred, recovered, or managed. *** ## V ### Verification The process of confirming the authenticity, integrity, ownership, and validity of a Physical Digital Asset. *** ### Verification Service A trusted service responsible for validating certificates, identities, ownership, and asset status. *** ### Verifiable Credential (VC) A digitally signed credential that can be cryptographically verified without requiring direct communication with the issuer. *** ## W ### Wallet Software used to manage Physical Digital Assets, digital ownership, payments, and identity credentials. *** ### Wallet SDK The software toolkit used to develop applications compatible with the DCN Wallet Architecture. *** ## Z ### Zero-Knowledge Proof (ZKP) A cryptographic technique allowing one party to prove a statement is true without revealing the underlying information. Future versions of the DCN Standard may leverage ZKP technologies to enhance privacy and selective disclosure. *** ## Glossary Maintenance As the DCN ecosystem evolves, this glossary will continue to expand. New technical terms, standards, protocols, hardware technologies, and governance concepts introduced in future versions of the specification will be incorporated while preserving consistency across the documentation. The glossary serves as the authoritative vocabulary for the Digital Crypto Note Standard and should be referenced whenever interpreting technical or architectural content within this Vision Paper. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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