iiinova — where your digital self keeps evolving

the glorious future is here, now

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the way it should always have been built

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built-in privacy by default

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penumbra @penumbra.zone · 23/10/2024

no tracking, no cookies, no forced data consent

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defi on stealth mode

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penumbra @penumbra.zone · 22/10/2024

Penumbra Labs will also be at the Shielding Summit to give a product demo as well as connect with fellow builders looking to learn more about utilising Penumbra

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penumbra @penumbra.zone · 22/10/2024

Penumbra will be at Devcon

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penumbra @penumbra.zone · 22/10/2024

Penumbra is now live on mainnet: penumbra.zone

penumbra.zone

Penumbra - Home

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To test it out, install the extension, use the Discord faucet to request testnet tokens, and let us know what's broken in the web-ext-feedback channel!

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And, because the extension performs local indexing, most RPC requests are processed locally, so the demands on fullnodes are lightweight. To support decentralization, our goal is that any `pd` node should be able to serve a frontend, out-of-the-box, with no configuration.

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This design means that spending or viewing keys never leave the extension, so users can grant viewing permissions to web interfaces and revoke them later, and see exactly what they're authorizing before they approve.

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These services are first-class interfaces used throughout the Penumbra ecosystem. For the web, we provide them through a browser extension, using a custom transport object allowing frontend code to make GRPC requests to the extension the same way it would call a remote server.

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The Custody service handles auth requests, allowing the user to review and authorize a TransactionPlan describing a proposed transaction, and returning a bundle of auth data needed to build the transaction.

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The View service is a personal indexer, providing read access to all private data visible to a given wallet. It scans for relevant transactions, downloads them, and decrypts and indexes them locally.

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Our approach to solving this problem is to provide a "local RPC" in a browser extension that restores the programming model for frontends for transparent chains. We define two GRPC services, for "read" and "write":

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We need to rethink data management because privacy means no centralized server with access to all of a user's data. So we have to think holistically about how the protocol reaches all the way out to end-user devices. Privacy forces us to build a truly decentralized system.

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Frontends can operate on pre-interpreted views that show exactly what data is visible and what is opaque.

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Penumbra - How to See in the Dark: Navigating Penumbra

To do this, we've built first-class modeling of data visibility through the entire transaction lifecycle, which you can read about here: penumbra.zone/blog/how-to-...

penumbra.zone

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We need to rethink data modeling because introducing privacy -- control over information disclosure -- requires being able to model what information is visible to whom. We need to show users what they see and what others see.

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Shielded chains achieve privacy by moving end-user data off the chain and onto end-user devices, and that means those end-user devices must be responsible for scanning and processing that data. This requires rethinking both data modeling and data management.

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Solving on-chain privacy has the side effect of upending fundamental design assumptions about how frontends are built. For instance, on a shielded chain, there's no RPC to query for your account balance, since only you can see it.

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For use in interacting with the Penumbra blockchain

To test it out, check out our Chrome extension here: chrome.google.com/webstore/det... or read on for more details!

chrome.google.com

Penumbra wallet

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𝓐𝓾𝓫𝓻𝓮𝔂 @aub.bsky.social · 21/09/2023

Penumbra Testnet 63, "Rhea", is now live! This release lands web wallet support, bringing shielded transactions to the web! You can now create and view shielded transactions from your browser, with all scanning, decryption, and proving performed locally: penumbra.zone/blog/bringin...

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Reposted by penumbra

working on privacy software is fun because we have built a system to effectively conceal all of the information that would make what I need to do very easy, so my frustration here is tempered by a sense of accomplishment

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penumbra @penumbra.zone · 21/08/2023

This past month, Penumbra underwent two audits—by NCC Cryptography Services, and ZKSecurity, respectively—covering the protocol's cryptography design and ZK circuits. Several issues were found, with the fixes merged as part of Testnet 59: Enceladus. Read more here: penumbra.zone/blog/2023-au...

Two black mages in gray robes overlooking a laptop, with a shimmering bronze background whispering threads of code, forming a soothing cityscape lullaby.

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penumbra @penumbra.zone · 06/07/2023

The story goes like this: USA is captured by a privacy singularity as surveillance capacity and financial coercion lock into authoritarian take-off. Logistically accelerating biological-economic interactivity crumbles status quo social order in auto-sophisticating corporate runaw

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Penumbra - How to See in the Dark: Navigating Penumbra

How can we provide a unified interface for separating decrypted signal from encrypted noise, and conveying a sense of where visibility begins and ends in the context of particular transactions? Check out our latest blogpost to learn how we do it: penumbra.zone/blog/how-to-see-in-th…

penumbra.zone

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The same data can be viewed from multiple vantage points or perspectives corresponding to different sets of key material & giving different insight into the data’s meaning. This poses a challenge: how can we enable developers to build tools for users to navigate this environment?

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This horizon will vary by user: for instance, the sender of a transfer may be able to see the entire transaction, while the receiver of the same transfer may only be able to see the funds sent to them.

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On Penumbra, users experience a kind of “encryption horizon”: they can only see data when in possession of certain key material, defining a limit of visibility beyond which they cannot see.

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