{"id":40782,"date":"2025-08-06T14:31:50","date_gmt":"2025-08-06T14:31:50","guid":{"rendered":"https:\/\/dogewisperer.com\/?p=40782"},"modified":"2025-08-06T14:31:50","modified_gmt":"2025-08-06T14:31:50","slug":"ex-apple-engineer-unveils-privacy-focused-crypto-visa-card","status":"publish","type":"post","link":"https:\/\/dogewisperer.com\/?p=40782","title":{"rendered":"Ex-Apple Engineer Unveils Privacy-Focused Crypto Visa Card"},"content":{"rendered":"
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Three years in the making, the Payy Visa card hides stablecoin transactions using clever cryptographic proofs and a custom-built ledger, avoiding the situation where non-custodial card spending can be looked up and traced on public blockchains.<\/p>\n

Former Apple iOS engineer Sid Gandhi, co-founder of the team that built the Payy card, thinks it\u2019s irresponsible, unethical, even borderline illegal \u2013 taking General Data Protection Regulation (GDPR) into consideration \u2013 to offer users on-chain financial services where every single transaction and balance is publicly visible on the blockchain forever.<\/p>\n

\u201cEither I’m crazy or everyone else is crazy, because you just can’t build a financial system without the core pillar of confidentiality,\u201d Polybase Labs CEO Gandhi said in an interview. <\/p>\n

\u201cWe spent two years building a layer two payments network from scratch. We didn’t use EVM [Ethereum Virtual Machine-compatible blockchain] or anything like that, because they’re not usable for private payments,\u201d he added.<\/p>\n

In the same way that people\u2019s online activity is tracked and exploited, a \u201cscary future\u201d lies ahead where it\u2019s possible to start relating IP addresses to blockchain wallets, meaning on-chain activity can be matched to emails, Instagram or Facebook profiles, according to Gandhi.<\/p>\n

Under the hood, Payy uses zero-knowledge proofs (ZKPs<\/a>) to allow an authorization when tapping the card; a Payy Network blockchain transaction then debits the amount from the user\u2019s wallet to quickly settle with Visa.<\/p>\n

The Payy team took inspiration from privacy networks like Zcash<\/a>, Monero and Aztec, Gandhi said. But unlike these earlier privacy blockchains, Payy was focused from the beginning doing private stablecoin transactions in a regulatory compliant manner, avoiding obstacles that would hamper acceptance and user uptake.<\/p>\n

\u201cAll the other existing privacy technologies don’t have this idea of compliance baked in,” Gandhi said. “We’ve been thinking about compliance and privacy for a very long time, and realized that you have to continue doing the existing AML [anti-money laundering] and compliance operations, even if you have a privacy network.\u201d<\/p>\n

As well as solving for privacy, Gandhi claims his card has the easiest onboarding and user experience of any wallet and crypto payment offering on the market.<\/p>\n

\u201cI have tried everything. Even my sophisticated non-crypto friends will never be able to use any of these solutions. I can say that confidently. Our philosophy is that the product should be usable by anyone and everyone. Every single iteration of an on-chain bank for the last 10 years that we have seen is not usable.” he said.<\/p>\n

To date, Payy builder Polybase Labs has raised funds from Robot Ventures, DBA Crypto, 6th Man Ventures, Orange DAO, Protocol Labs and others.<\/p>\n

\u201cPayy finally built a real alternative to consumer banking,\u201d said Robot Ventures partner Robert Leshner, in a statement. \u201cYou can now save and spend self-custodied stablecoins privately without ever knowing they\u2019re on a blockchain. And it just works.\u201d<\/p>\n

<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Three years in the making, the Payy Visa card hides stablecoin transactions using clever cryptographic proofs and a custom-built ledger, avoiding the situation where non-custodial card spending can be looked up and traced on public blockchains. Former Apple iOS engineer Sid Gandhi, co-founder of the team that built the Payy card, thinks it\u2019s irresponsible, unethical, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":0,"footnotes":""},"categories":[2],"tags":[3,4,5],"class_list":["post-40782","post","type-post","status-publish","format-standard","hentry","category-news","tag-crypto","tag-doge","tag-news"],"_links":{"self":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts\/40782","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=40782"}],"version-history":[{"count":0,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts\/40782\/revisions"}],"wp:attachment":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}