{"product_id":"powerverify-attested-cryptographically-signed-power-only-usb-c-interface-preorder","title":"PowerVerify Attested — Cryptographically Signed Power-Only USB-C Interface","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePreorder — $150, charged today · In development · Target ship: mid-August 2026\u003c\/strong\u003e\u003c\/p\u003e\n\u003cblockquote class=\"ml-2 border-l-4 border-[hsl(var(--border-300)\/0.1)] pl-4 text-text-300\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eThis is a paid preorder for a product still in development.\u003c\/strong\u003e You're charged $150 at checkout. We're targeting \u003cstrong\u003emid-August 2026\u003c\/strong\u003e to ship. That's a target, not a guarantee — hardware in development can slip. If we can't meet it, we'll tell you, give you a revised date, and you can take a full refund at that point — or anytime before your unit ships. You're funding the final board work and first production run, and we'll keep you posted on exactly where the build stands.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eCore lets you \u003cem\u003esee\u003c\/em\u003e there's no data path. Attested lets you \u003cem\u003eprove\u003c\/em\u003e it.\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePowerVerify Core makes the data lines physically absent — and lets you verify that with your own eyes. PowerVerify \u003cstrong\u003eAttested\u003c\/strong\u003e adds the next thing a forensic, legal, or procurement context needs: a way to prove, to someone who wasn't in the room, that a specific session happened on a specific device with no data path — without trusting ZKNOT, the host, or the operator.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eEvery power session is signed by a secure element on the device itself. The result is a record any third party can re-check against a published key, offline, with no central authority to trust.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWhat Attested adds over Core\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eA hardware secure element (ATECC608B).\u003c\/strong\u003e Generates its key pair on-device; the private key never leaves the chip and can't be extracted in software.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSigned power-session records.\u003c\/strong\u003e Each session is signed in hardware: device identity, start\/end timestamps, measured voltage and current, and an attestation that no data path was active. The signature covers all of it — change any field and verification fails.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMeasured, not assumed.\u003c\/strong\u003e An onboard current\/voltage monitor (INA219) records the real power profile of the session, not a nominal label.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eThird-party verifiable, offline.\u003c\/strong\u003e Anyone with the device's public key can verify a session record without contacting ZKNOT, without the device present, and without network access. Trust comes from the math, not from us.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eTamper-evident history.\u003c\/strong\u003e Session records are hash-chained — each links to the one before it — so deletion or alteration of a past record is detectable.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAnti-replay.\u003c\/strong\u003e A monotonic counter advances with every session, so records can't be reused or backdated.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePairs with ZKey (roadmap).\u003c\/strong\u003e Designed to share a session identifier with the ZKey human-presence signer, so a single verifiable record can prove both that power was delivered with no data path and that a human authorized the event in the same session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eThe honest boundary — what a signed session does and doesn't prove\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis is the upgrade over Core: Attested signs on the device, in the field, not just at our bench. So a verified session record is real cryptographic proof that \u003cem\u003ethis identified device recorded a power session with these measured parameters and no active data path.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhat it does \u003cstrong\u003enot\u003c\/strong\u003e claim: it isn't proof of what a charged device did internally beyond drawing power, and we don't market it as a legal guarantee of anything. It's designed for evidentiary and chain-of-custody workflows; how a given record is used in a proceeding is for the people running that proceeding to decide. We'll always tell you exactly what a claim is and what it isn't.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eHow verification works\u003c\/h2\u003e\n\u003col class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-decimal flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA session ends; the secure element signs the session record.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe signed record is retrieved from the device.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eA verifier checks the signature against the device's published public key and confirms the hash chain and counter.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThe result is independently re-checkable — by you, by a recipient, by an auditor — without trusting the website, the host, or us.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eIntended specifications (in development — subject to change)\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUSB-C power-only path: D+\/D− and SuperSpeed pairs physically absent; VBUS\/GND pass through; CC pins for power negotiation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e5–20V DC USB-C Power Delivery pass-through\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSTM32G0B1 microcontroller · ATECC608B secure element · INA219 current\/voltage monitor\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eECDSA P-256 signatures; on-device key generation, private key never exported\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHash-chained, monotonic-counter session records\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSolid clear-resin potting with unique optical fingerprint, photographed and recorded at manufacture\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSerialized; records verifiable at verifyknot.io and from the published public key\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePatent Pending — U.S. Application No. 63\/961,118 (additional applications pending)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDesigned in Utah · veteran-owned (SDVOSB) · Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWho it's for\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePeople who must prove something to \u003cem\u003eothers\u003c\/em\u003e, not just protect themselves: digital-evidence and chain-of-custody work · investigators and attorneys · journalists and researchers in adversarial settings · labs and secure facilities · procurement teams that need verifiable device provenance and session integrity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIf you only need to protect your own device while charging, \u003cstrong\u003ePowerVerify Core\u003c\/strong\u003e is the right product and it's available now. Attested is for when a third party has to believe you.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003ePreorder terms\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCharged today.\u003c\/strong\u003e Your $150 is collected at checkout — this is a preorder, not a free reservation.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eTarget ship: mid-August 2026.\u003c\/strong\u003e A target, not a guarantee. Hardware in development can slip.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFull refund if we slip or you change your mind.\u003c\/strong\u003e If we miss the target window we'll notify you with a revised date and your option to refund in full. You can also cancel for a full refund anytime before your unit ships.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eWhat you're funding.\u003c\/strong\u003e Final board revisions, firmware, secure-element provisioning, and the first production run.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eEarly-backer pricing.\u003c\/strong\u003e $150 is the preorder price; retail will be higher after launch.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eLimited slots,\u003c\/strong\u003e so we can build and support a small first batch well.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZKNOT","offers":[{"title":"Default Title","offer_id":53190636863599,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/shop.zknot.io\/products\/powerverify-attested-cryptographically-signed-power-only-usb-c-interface-preorder","provider":"ZKNOT","version":"1.0","type":"link"}