{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GSX6OMUXARRLMMKOCEIRSH76T4","short_pith_number":"pith:GSX6OMUX","canonical_record":{"source":{"id":"1512.04362","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2015-12-14T15:25:04Z","cross_cats_sorted":[],"title_canon_sha256":"23ddd9f2bdccda747eb920d86aea413735626fb403161c79bbd778af6142ebdb","abstract_canon_sha256":"5f6b488cee2f01efa3b19d628e940c7f781594a631492a3a9bc3da45fef18f99"},"schema_version":"1.0"},"canonical_sha256":"34afe732970462b6314e1111191ffe9f0b34d8a40349419247c7f6c7cec3f564","source":{"kind":"arxiv","id":"1512.04362","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04362","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04362v3","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04362","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"pith_short_12","alias_value":"GSX6OMUXARRL","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GSX6OMUXARRLMMKO","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GSX6OMUX","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GSX6OMUXARRLMMKOCEIRSH76T4","target":"record","payload":{"canonical_record":{"source":{"id":"1512.04362","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2015-12-14T15:25:04Z","cross_cats_sorted":[],"title_canon_sha256":"23ddd9f2bdccda747eb920d86aea413735626fb403161c79bbd778af6142ebdb","abstract_canon_sha256":"5f6b488cee2f01efa3b19d628e940c7f781594a631492a3a9bc3da45fef18f99"},"schema_version":"1.0"},"canonical_sha256":"34afe732970462b6314e1111191ffe9f0b34d8a40349419247c7f6c7cec3f564","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:17.723158Z","signature_b64":"lg2cZlQ2i519kul6Kit+sRAO9RL7gxaNqSTIOTNiX+Ul4RymM6NlosxzpZg4IG7cLhqBW1uJuQuMWpIae3peAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"34afe732970462b6314e1111191ffe9f0b34d8a40349419247c7f6c7cec3f564","last_reissued_at":"2026-05-18T00:53:17.722596Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:17.722596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.04362","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:53:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8V+zvYlBFlSAPLM0MXlxsSzUgwVzCV68VvYM4MfoJ+RsL8V8LmAEf4tpnxouJ0Zikxc/ESGl+WVSSWzP6MzxDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:11:53.733688Z"},"content_sha256":"13d1d1bbaea3eb834cf6712dc78f6ec365e71d613fe94a16fcd3fd124dd09b28","schema_version":"1.0","event_id":"sha256:13d1d1bbaea3eb834cf6712dc78f6ec365e71d613fe94a16fcd3fd124dd09b28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GSX6OMUXARRLMMKOCEIRSH76T4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Passive Communication with Ambient Light","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.NI","authors_text":"Domenico Giustiniano, Marco Zuniga, Qing Wang","submitted_at":"2015-12-14T15:25:04Z","abstract_excerpt":"In this work, we propose a new communication system for illuminated areas, indoors and outdoors. Light sources in our environments -such as light bulbs or even the sun- are our signal emitters, but we do not modulate data at the light source. We instead propose that the environment itself modulates the ambient light signals: if mobile elements 'wear' patterns consisting of distinctive reflecting surfaces, single photodiode could decode the disturbed light signals to read passive information. Achieving this vision requires a deep understanding of a new type of communication channel. Many parame"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04362","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:53:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RaPkczXfqE3DfDPIXiCYVEAJ5/USvebc0OzrJswyrgUEnwuNWj7CTvhBu/iVr5SoJgmNZBI9jrZyqX+Phf+qBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:11:53.734042Z"},"content_sha256":"748c2ea34f226b13da1fffd3a1ca8fb5ad4f4d88291490c18e448596e2cc773e","schema_version":"1.0","event_id":"sha256:748c2ea34f226b13da1fffd3a1ca8fb5ad4f4d88291490c18e448596e2cc773e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GSX6OMUXARRLMMKOCEIRSH76T4/bundle.json","state_url":"https://pith.science/pith/GSX6OMUXARRLMMKOCEIRSH76T4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GSX6OMUXARRLMMKOCEIRSH76T4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T21:11:53Z","links":{"resolver":"https://pith.science/pith/GSX6OMUXARRLMMKOCEIRSH76T4","bundle":"https://pith.science/pith/GSX6OMUXARRLMMKOCEIRSH76T4/bundle.json","state":"https://pith.science/pith/GSX6OMUXARRLMMKOCEIRSH76T4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GSX6OMUXARRLMMKOCEIRSH76T4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GSX6OMUXARRLMMKOCEIRSH76T4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5f6b488cee2f01efa3b19d628e940c7f781594a631492a3a9bc3da45fef18f99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2015-12-14T15:25:04Z","title_canon_sha256":"23ddd9f2bdccda747eb920d86aea413735626fb403161c79bbd778af6142ebdb"},"schema_version":"1.0","source":{"id":"1512.04362","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04362","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04362v3","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04362","created_at":"2026-05-18T00:53:17Z"},{"alias_kind":"pith_short_12","alias_value":"GSX6OMUXARRL","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GSX6OMUXARRLMMKO","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GSX6OMUX","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:748c2ea34f226b13da1fffd3a1ca8fb5ad4f4d88291490c18e448596e2cc773e","target":"graph","created_at":"2026-05-18T00:53:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In this work, we propose a new communication system for illuminated areas, indoors and outdoors. Light sources in our environments -such as light bulbs or even the sun- are our signal emitters, but we do not modulate data at the light source. We instead propose that the environment itself modulates the ambient light signals: if mobile elements 'wear' patterns consisting of distinctive reflecting surfaces, single photodiode could decode the disturbed light signals to read passive information. Achieving this vision requires a deep understanding of a new type of communication channel. Many parame","authors_text":"Domenico Giustiniano, Marco Zuniga, Qing Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2015-12-14T15:25:04Z","title":"Passive Communication with Ambient Light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04362","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:13d1d1bbaea3eb834cf6712dc78f6ec365e71d613fe94a16fcd3fd124dd09b28","target":"record","created_at":"2026-05-18T00:53:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5f6b488cee2f01efa3b19d628e940c7f781594a631492a3a9bc3da45fef18f99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2015-12-14T15:25:04Z","title_canon_sha256":"23ddd9f2bdccda747eb920d86aea413735626fb403161c79bbd778af6142ebdb"},"schema_version":"1.0","source":{"id":"1512.04362","kind":"arxiv","version":3}},"canonical_sha256":"34afe732970462b6314e1111191ffe9f0b34d8a40349419247c7f6c7cec3f564","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34afe732970462b6314e1111191ffe9f0b34d8a40349419247c7f6c7cec3f564","first_computed_at":"2026-05-18T00:53:17.722596Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:17.722596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lg2cZlQ2i519kul6Kit+sRAO9RL7gxaNqSTIOTNiX+Ul4RymM6NlosxzpZg4IG7cLhqBW1uJuQuMWpIae3peAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:17.723158Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.04362","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13d1d1bbaea3eb834cf6712dc78f6ec365e71d613fe94a16fcd3fd124dd09b28","sha256:748c2ea34f226b13da1fffd3a1ca8fb5ad4f4d88291490c18e448596e2cc773e"],"state_sha256":"347be66cb54fc51c3f991ab1c4a4dca3f9c7c7dbbecba62f3fa36fcecc4eda20"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dsJA7wGKXxTdu1mbbIPPqAT9Iyv807vKsmFp4X/ATqSSmL35UtyMaPWzfPhXlYzVSHdZg448l8jjPszv3we1DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T21:11:53.735925Z","bundle_sha256":"2a0a6cc8aae4d906de8942fc747a6c1e4a665df5f112a6c9e8c2b7324e7db329"}}