Arvid

Are you this old?

UNLINKABLE Issue 4: @UmbraPrivacy What's Umbra and how does it work? Umbra on @solana is trying to do something ambitious: turn privacy from a “degenerate side quest” into a first‑class, compliance‑ready primitive for serious capital. Most private flows on Solana today are either: - mixers with fixed denominations and obvious usage patterns, or - account‑level abstractions that still leak balances, counterparties, and behavior to anyone running a block explorer. Umbra’s design goes in almost the opposite direction. Instead of wrapping public accounts in a thin veil, it builds a shared encrypted state where balances, links, and flows are hidden by default, and the public chain only ever sees zero-knowledge proofs that “something valid happened.” Arcium’s MPC network handles the off‑chain encrypted computation, so sensitive data gets processed and shielded before it even hits Solana. That shared state matters. Mixers fragment liquidity into pots and epochs; you constantly fight churn and liquidity constraints and pray that your withdrawal timing doesn’t deanonymize you. With a single, evolving shielded state, Umbra lets value flow internally without exposing who talked to whom, how much they moved, or what strategy they’re running. The other axis is UX. Privacy historically meant: run custom clients, babysit proofs, fund burner wallets, pay gas twice, and hope your relayer isn’t logging everything. Umbra pushes this into an SDK + relayer stack that is meant to feel invisible to the user: - gasless interactions where a relayer fronts fees - withdrawals to fresh public addresses - wallet/dApp integrations that can present “Send privately” as a one‑click toggle, not a whole new mental model. The most controversial piece is also the most pragmatic: auditable privacy. Instead of pretending regulators don’t exist, Umbra bakes in viewing keys and an auditor framework so users can prove solvency, source of funds, and transaction history to specific parties without turning their life into an open spreadsheet. Verdict That combination (shared encrypted state powered by Arcium MPC, an invisible user experience, and built-in auditability) is what sets Umbra apart from traditional mixers and most shielded systems on Solana. Mixers are transactional bandaids, designed for one-off obfuscation. Shielded account models reduce visibility but still leak structural patterns over time. Umbra is positioning itself as a protocol primitive: a privacy layer other applications can natively integrate, where on-chain behavior is private by default, yet selectively provable when disclosure actually matters. Unfortunately, we have to wait until @Arcium goes live. 😤 X: @UmbraPrivacy Website: umbraprivacy.com/ Token: $UMBRA

UNLINKABLE Issue 3: @CipherNetSolana 1/ What is CipherNet? CipherNet is a privacy-first Web3 browser on @solana, engineered to erase identity trails, sever wallet linkages, and block behavioral tracking across dApps. Core features include ephemeral wallets, auto-burn sessions, encrypted dApp isolation, MSG masking, and a built-in mixer. All in a secure environment for trace-free exploration. 2/ How does it work? CipherNet runs as a secure browser environment where every session opens in an isolated container, shielding users from tracking. dApps execute in standalone encrypted sandboxes—no shared cookies, storage, metadata leaks, or cross-app fingerprints. MSG masking layers instructions: users sign isolated payloads, the system obfuscates routes, and transactions execute anonymously. - Ephemeral Wallets: Generated on-demand per session for instant use—no address reuse or on-chain identity buildup. - Paired with Auto-Burn Protocol: Browser exit triggers burn queue wiping keys, routes, memos, permissions, and artifacts—zero traces left. Enables safe dApp usage without main wallet exposure to linkage, clustering, or history attacks. - Integrated mixer AI-optimizes unlinkability by randomizing amounts, timing, routes, and metadata. 3/ Verdict With a developer from Spillways on @ethereum, CipherNet brings credible privacy engineering to Solana and targets a clear niche: browser-native anonymity for safer dApp usage in an environment dominated by address clustering and on-chain tracking. That same focus is also the risk. CipherNet is a niche product, and broader adoption depends on execution (clear revenue strategy, polished UX, a functional mobile version, and thorough audits). Still, from a privacy-infrastructure perspective, it stands out as one of the more unique projects in the space right now. X-Profile: @CipherNetSolana Website: ciphernetsol.xyz Token: $CiNET

Since we’re all getting played anyway, should we just quit?

Sooo just another pump and dump? $BLIND

Please, no more whales. Be more creative.

UNLINKABLE Issue 2: @Veildotcash 1/ What is Veil Cash? Veil Cash is a non-custodial zk-SNARK privacy protocol on @Base that breaks the on-chain link between deposit and withdrawal addresses using trusted pools. It mimics Tornado-style mixers but integrates with Base's low fees and Coinbase verification for verified users. 2/ How does it work? Users deposit ETH into shared pools with fixed denominations, receiving a cryptographic note for later withdrawal. A zk-SNARK proof during withdrawal confirms note ownership, hides the deposit source, and sends funds to a fresh address—making links untraceable to observers. Veil Cash limits access to its privacy pools to verified users—addresses that meet Veil’s eligibility requirements through either pre-verification or deposit screening. 3/ Verdict Base’s push into the mainstream will require credible privacy infrastructure for payments, OTC flows, and advanced DeFi without custodial risk. Veil.Cash currently stands out on Base with a zk-native, audited design and demonstrable pool activity, positioning it as an early leader in compliant, verified-user privacy. That advantage is not uncontested. Coinbase’s March 2025 acquisition of the Iron Fish team signals a clear intent to develop first-party privacy primitives, including zk-SNARKs and confidential transactions, directly at the Base layer. If successful, this could turn privacy into a built-in commodity, structurally favoring native integrations and increasing pressure on independent protocols. In this environment, Veil’s long-term relevance will depend on execution speed and clear differentiation beyond what Base itself may offer.

UNLINKABLE Issue 1: @theprivacycash 1/ What is Privacy Cash? Privacy Cash is a non‑custodial privacy protocol built for @Solana, designed to break the on‑chain link between funding and receiving wallets for SOL transfers. It behaves like a Tornado‑style mixer on Solana, focusing on speed, UX, and deep integration into the Solana DeFi stack. Privacy Cash processed hundreds of thousands of SOL (over 100M USD equivalent) across tens of thousands of transactions and wallets, signaling strong organic demand. 2/ How does it work? Users deposit SOL into shared “pools”. They receive a cryptographic “note” representing the right to withdraw later from that pool. When withdrawing, a zero‑knowledge proof: - Confirms they own a valid note. - Hides which deposit is being spent. - Sends funds to a fresh wallet, breaking the deterministic link on‑chain. To an external observer, the chain shows many deposits into the same contracts and many withdrawals to new addresses, without a clear mapping between the two. 3/ Verdict Adoption momentum is clear: measurable volume, active wallets, and growing mentions from Solana‑native users position Privacy Cash as a frontrunner in terms of privacy. The team needs to keep shipping (SPL support, better UX), avoid security incidents, and navigate a regulatory environment that’s still deciding how to treat on-chain privacy tools. Stronger design/branding would help as well. The key question is how the landscape evolves once infrastructure projects like Arcium launch, and how that reshapes privacy on Solana.

I want to do something new, so I’m starting a reporting series called Unlinkable. It’s about privacy in crypto, looking beyond $ZEC and $XMR. In my opinion real privacy adoption has to happen on the chains we actually use every day. Each issue takes a brief and critical look at one privacy project: how the tech works, and where it falls short. I also want to highlight lesser-known projects that don’t get much attention. I’ll drop the first couple of issues today. If there are privacy projects I should cover, drop them in the comments.