The Spanish Purple Cross (Creu Roja) has launched RedChain, a brand new blockchain-based help distribution system that guarantees real-time donor transparency with out revealing the identities of these receiving help.
The platform was developed in collaboration with Barcelona-based infrastructure supplier BLOOCK and zero-knowledge credential firm Billions Community and goals to digitize “your complete help lifecycle, from donation to fee,” in response to a launch shared with Cointelegraph.
It replaces paper vouchers and pay as you go playing cards with ERC-20 help credit issued on the Ethereum (ETH) blockchain. This credit score is delivered to your cell pockets by way of a fast response (QR) code to be used at collaborating retailers.
Beneficiary information, together with names, contact info, and case data, is saved fully off-chain inside Creu Roja’s proprietary programs. Public blockchains are used purely as a verification layer, pinning hashes, timestamps, and proof of transaction integrity somewhat than personal info.
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RedChain goals to separate transparency from id
Whereas donors and directors can audit when and the place funds are allotted and spent, the system is designed to stop events from reconstructing particular person identities from on-chain data.
sauce: Purple Cross
“Donors will be capable to see aggregated and verifiable details about how their funds are allotted and spent, together with how a lot was distributed inside the program and when disbursements had been made,” a Creu Roja spokesperson instructed Cointelegraph. However “what donors won’t ever see is the id and private circumstances of the beneficiaries.”
A spokesperson stated RedChain is “explicitly designed in order that transparency applies to flows and outcomes, not people, permitting the Purple Cross to be accountable to donors with out compromising the privateness or dignity of beneficiaries.”
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Humanitarians demand verifiable help flows
Creu Roja constructed RedChain in response to rising stress on humanitarian organizations to show that help can obtain its meant targets with out turning weak communities into information sources.
“Folks looking for help mustn’t have to decide on between receiving help and defending their privateness,” Francisco López Romero, chief know-how officer at Creu Roja Catalunya, stated in a launch.
Recipients obtain digital credit of their cellphone wallets and pay via common checkouts, making transactions indistinguishable from common purchases and avoiding seen markers that point out somebody is an help recipient.
“We give them credit score they usually can store at grocery store chains that adjust to rules and comply with our program,” the spokesperson stated. “We can not exclude anybody as a result of technical limitations.”
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Blockchain as a notary for help
This technique implements a hybrid belief mannequin. ERC-20 tokens symbolize the allotted help, whereas spending data and eligibility checks stay in an off-chain database linked to on-chain proofs.
BLOOCK describes its function as working a “blockchain as an authentication layer” structure, with cryptographic anchors permitting it to detect tampering with inside data with out exposing the underlying information.
BLOOCK CEO Lluis Libre instructed Cointelegraph: “All related state modifications are cryptographically fastened to the general public blockchain, so any subsequent modifications to inside data will instantly fail validation in opposition to the immutable on-chain proof.”
He stated blockchain primarily “acts as a notary public, confirming the prevalence of an occasion with out revealing its content material or who was concerned.”
Billions Community, alternatively, gives a zero-knowledge authentication layer that enables beneficiaries to show their eligibility and authorization with out disclosing their id or attributes. Proof is saved within the consumer’s personal pockets, somewhat than in a centralized id registry.
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