{"id":31548623,"url":"https://github.com/osoleve/guidwatermark","last_synced_at":"2025-10-04T16:38:02.437Z","repository":{"id":47782213,"uuid":"395203321","full_name":"osoleve/GUIDWatermark","owner":"osoleve","description":"Proof of concept for discreetly watermarking a database extract for distribution to unsecured third parties, supporting up to 2^128 recipients.","archived":false,"fork":false,"pushed_at":"2021-08-14T23:57:06.000Z","size":2803,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2023-03-11T10:42:58.659Z","etag":null,"topics":["data-distribution","guid","haskell","watermarking"],"latest_commit_sha":null,"homepage":"","language":"Haskell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/osoleve.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2021-08-12T05:20:17.000Z","updated_at":"2021-08-14T23:57:08.000Z","dependencies_parsed_at":"2022-09-07T21:21:18.707Z","dependency_job_id":null,"html_url":"https://github.com/osoleve/GUIDWatermark","commit_stats":null,"previous_names":[],"tags_count":null,"template":null,"template_full_name":null,"purl":"pkg:github/osoleve/GUIDWatermark","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/osoleve%2FGUIDWatermark","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/osoleve%2FGUIDWatermark/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/osoleve%2FGUIDWatermark/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/osoleve%2FGUIDWatermark/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/osoleve","download_url":"https://codeload.github.com/osoleve/GUIDWatermark/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/osoleve%2FGUIDWatermark/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":278343081,"owners_count":25971399,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-10-04T02:00:05.491Z","response_time":63,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["data-distribution","guid","haskell","watermarking"],"created_at":"2025-10-04T16:37:27.465Z","updated_at":"2025-10-04T16:38:02.394Z","avatar_url":"https://github.com/osoleve.png","language":"Haskell","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Watermark\nProof of concept for discreetly watermarking a database extract for distribution to unsecured third parties, supporting up to 2^128 recipients. Requires on average \u003e20,000 GUIDs to work properly, but a weaker version not published here can work with fewer.\n\nFor educational purposes only. If you want to use this in production, please contact me first so I can talk you out of it.\n\n```haskell\n\u003e import Watermark\n\n\u003e guids = [\"26CCDA16-1077-FB69-720B-2154ABB48E98\"\n          ,\"9FF085EC-DA5D-2ECF-532F-AEEA0974AEEB\"\n          ,\"E6A93E8C-580A-6AAB-A46F-28566544F8BA\"\n          ,\"F841B897-9454-60A5-8C81-09AF3F244F1B\"\n          ,\"91F5AFD7-8B18-23D0-E0B7-B6D24D54FF3B\"\n          ,\"D449EDAE-665D-8ABB-C44D-710A4A046E99\"\n          ,\"A9695C53-7DA6-3EA0-3CB8-01831DE4DF6B\"\n          ,\"16187EA0-F097-6950-385C-CA1B81A4EDEB\"\n          ,\"E09D2014-88D4-18D4-FB95-28B81C64F58A\"\n          ,\"D66C25C8-4F7B-6D12-DACE-ACCA08843379\"]\nguids :: [[Char]]\n\n\u003e clientGUID = \"A0562609-1AF7-DD39-A2B4-35E71B3A14BC\"\nclientGUID :: [Char]\n\n\u003e map (watermark clientGUID) guids\n[\"26cCDA16-1077-Fb69-720B-2154ABB48E98\"\n,\"9FF085ec-DA5d-2EcF-532f-AeEA0974aeEB\"\n,\"e6a93E8C-580a-6aAB-A46f-28566544F8ba\"\n,\"F841b897-9454-60a5-8C81-09AF3F244f1B\"\n,\"91F5aFd7-8B18-23d0-E0B7-B6D24D54ff3B\"\n,\"D449eDaE-665d-8abb-c44d-710a4A046E99\"\n,\"A9695C53-7Da6-3Ea0-3CB8-01831De4df6B\"\n,\"16187Ea0-F097-6950-385c-Ca1B81a4edEB\"\n,\"e09D2014-88d4-18D4-FB95-28B81c64F58a\"\n,\"D66c25c8-4f7b-6d12-daCe-acCa08843379\"]\nit :: [Watermark.GUID]\n```\n\n```haskell\n\u003e import Watermark\n\n\u003e guids = lines \u003c$\u003e readFile \"test/watermarked_guids.txt\"\nguids :: IO [String]\n\n-- recoverClientID takes a list of watermarked GUIDs\n-- Sample GUIDs watermarked with ClientID A0562609-1AF7-DD39-A2B4-35E71B3A14BC\n\u003e recoverClientID \u003c$\u003e guids\n\"A0562609-1AF7-DD39-A2B4-35E71B3A14BC\"\nit :: Watermark.ClientID\n```","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fosoleve%2Fguidwatermark","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fosoleve%2Fguidwatermark","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fosoleve%2Fguidwatermark/lists"}