{"adoption": {"forks": 200, "observed_at": "2026-08-28T04:06:52.957052+00:00", "stars": 2451}, "canonical_url": "https://ross.abutalabs.com/products/u2f-zero", "card": {"archived": false, "artifact_type": "application", "description": "U2F USB token optimized for physical security, affordability, and style", "domain": ["security", "hardware", "privacy"], "enriched": true, "function": ["security", "auth", "embedded"], "health_score": 20, "homepage": null, "language": "C", "license": "NOASSERTION", "license_family": "other", "maturity": "abandoned", "member_repos": ["conorpp/u2f-zero"], "name": "conorpp/u2f-zero", "platform": ["embedded", "cross-platform"], "pushed_at": "2022-09-01T01:17:44+00:00", "repo": "conorpp/u2f-zero", "stars": 2451, "tags": ["u2f", "two-factor-authentication", "hardware-token", "fido", "open-source-hardware", "usb-security-key"], "topics": ["u2f", "hardware", "security"], "urls": [], "use_cases": ["build my own U2F security key", "two-factor authentication for Google and GitHub", "open source hardware 2FA token", "cheap hardware security key for keychain", "U2F token with unlimited registrations"], "what_it_is": "U2F Zero is an open source hardware U2F security token for two-factor authentication, built on a small USB device with secure key storage. It is explicitly unmaintained and superseded by the Solo FIDO2 key.", "when_to_avoid": ["you need FIDO2 or passwordless login - use SoloKeys instead", "you want a maintained, supported product", "you need protection against targeted physical side-channel attacks"], "when_to_choose": ["you want to build your own U2F token from open source schematics", "you need a low-cost hardware 2FA key and accept U2F-only support"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/u2f-zero", "repo": "conorpp/u2f-zero", "role": "main", "score": 23}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:06:52.957052+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T02:30:12.427037+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3d898dae51de88ab84e70edca7cce6db84f9d2f4df2ffc0d80ed8c1dffd5a721", "fetched_at": "2026-08-28T04:06:52.957052+00:00", "kind": "readme", "missing": false, "url": "https://github.com/conorpp/u2f-zero"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_license"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 3898, "days_push": 1463, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 23, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}