Use Cases Flashcards

A luxury goods consortium wants to combat the multi-billion dollar counterfeit market by providing customers with a way to verify product authenticity. How could a blockchain-based solution most effectively address this problem?

Answer: By minting a unique, non-fungible token (NFT) for each product, recording its provenance from creation to sale on an immutable ledger.

Minting an NFT for each physical product creates a unique 'digital twin'. This token's transaction history on the blockchain serves as an immutable and transparent record of its provenance. A customer can scan a tag on the product to view this history and confirm its authenticity, effectively combating counterfeiting by making the product's entire lifecycle transparent and tamper-evident.

A user wants to apply for a loan online. Using a Self-Sovereign Identity (SSI) model built on blockchain, how would the user typically prove their identity and income to the lender?

Answer: By presenting digitally signed, verifiable credentials from trusted issuers (e.g., government, employer) that the lender can cryptographically validate.

In a Self-Sovereign Identity (SSI) model, individuals control their own identity data in a digital wallet. Trusted entities (like an employer or government) issue digitally signed "verifiable credentials." The user can then present these credentials to a verifier (the lender) to prove specific claims without necessarily sharing the source documents. The verifier can cryptographically confirm the credential's authenticity and issuer.

Which of the following is a primary benefit of using a blockchain-based system for national elections?

Answer: Providing a publicly auditable and tamper-evident record of votes cast.

The core advantage of using blockchain for voting is its ability to create a transparent and immutable ledger. Each vote is recorded as a transaction that cannot be altered or deleted. This creates a tamper-evident trail that can be publicly audited by anyone, increasing trust and confidence in the election results by making the counting process verifiable.

In the context of Decentralized Finance (DeFi), what is the primary purpose of a decentralized exchange (DEX)?

Answer: To facilitate peer-to-peer trading of digital assets directly from users' wallets without a central intermediary.

A decentralized exchange (DEX) uses smart contracts to allow users to trade digital assets directly with each other in a peer-to-peer manner. Unlike centralized exchanges, a DEX is non-custodial, meaning users always maintain control of their private keys and their funds within their own wallets.

What is the principal advantage of tokenizing an illiquid asset, such as a large commercial real estate building, on a blockchain?

Answer: It enables fractional ownership and improves liquidity by allowing the asset to be traded as smaller, digital shares on secondary markets.

Tokenization converts ownership rights in an asset into digital tokens on a blockchain. For a high-value, illiquid asset like a building, this allows for fractional ownership, where many investors can buy small shares (tokens). These tokens can then be traded more easily on digital asset exchanges, significantly increasing the asset's liquidity and making it accessible to a wider pool of investors.

A key objective of the U.S. Drug Supply Chain Security Act (DSCSA) is to trace prescription drugs to prevent counterfeit products from entering the market. Which blockchain feature is most critical for meeting this objective?

Answer: The creation of an immutable, time-stamped, and auditable record of a drug's custody as it moves through the supply chain.

Blockchain provides an immutable and transparent ledger where every transfer of a drug package can be recorded as a transaction. This creates a permanent, auditable trail of the drug's provenance from the manufacturer to the dispenser. This traceability makes it extremely difficult for counterfeit drugs to be introduced into the supply chain, as their origin cannot be verified on the ledger.