{"id":17047,"date":"2026-09-10T09:25:54","date_gmt":"2026-09-10T13:25:06","guid":{"rendered":"https:\/\/dev.nsira-ossnr.gc.ca:9174\/?page_id=17047"},"modified":"2026-09-10T14:15:27","modified_gmt":"2026-09-10T18:15:27","slug":"backgrounder","status":"publish","type":"page","link":"https:\/\/nsira-ossnr.gc.ca\/fr\/examens\/nos-examens\/25-11\/fiche-dinformation-2\/","title":{"rendered":"Technical Assurance Review of a Specific Communications Security Establishment Activity: Backgrounder"},"content":{"rendered":"
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\n Examen d\u2019assurance technique d'une activit\u00e9 particuli\u00e8re du Centre de la s\u00e9curit\u00e9 des t\u00e9l\u00e9communications <\/h1>\n\n
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\n Fiche d'information <\/h2>\n \n \n\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n\n
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<\/p>\n\n\n\n

Une version expurg\u00e9e du rapport d\u2019examen r\u00e9alis\u00e9 par l\u2019Office de surveillance des activit\u00e9s en mati\u00e8re de s\u00e9curit\u00e9 nationale et de renseignement (OSSNR) et intitul\u00e9 Examen de la suppression, par le Centre de la s\u00e9curit\u00e9 des t\u00e9l\u00e9communications, de donn\u00e9es de certains partenaires [**]<\/em> a r\u00e9cemment \u00e9t\u00e9 publi\u00e9e en vertu de la Loi sur l\u2019acc\u00e8s \u00e0 l\u2019information<\/em>.<\/p>\n\n\n\n

Cet examen constitue un exemple du nouveau format d\u2019examen d\u2019assurance technique (EAT), que l\u2019OSSNR utilise pour communiquer les r\u00e9sultats de ses travaux d\u2019examen au ministre comp\u00e9tent. Ce format permet de pr\u00e9senter une \u00e9valuation cibl\u00e9e \u2013 d\u2019un processus, d\u2019un syst\u00e8me ou d\u2019un m\u00e9canisme de contr\u00f4le particulier \u2013 et fond\u00e9e sur les \u00e9l\u00e9ments de preuve recueillis au cours de l\u2019examen.<\/p>\n\n\n\n

Importance de la question<\/a><\/strong><\/p>\n\n\n\n

Les organismes responsables de la s\u00e9curit\u00e9 nationale et du renseignement s\u2019appuient sur des syst\u00e8mes techniques complexes pour g\u00e9rer des renseignements \u00e0 caract\u00e8re sensible. Le r\u00f4le de l\u2019OSSNR consiste notamment \u00e0 v\u00e9rifier si ces syst\u00e8mes et les m\u00e9canismes de contr\u00f4le connexes fonctionnent comme pr\u00e9vu.<\/a><\/p>\n\n\n\n

Un EAT permet \u00e0 l\u2019OSSNR d\u2019examiner un processus particulier et d\u2019en \u00e9valuer l\u2019efficacit\u00e9 \u00e0 partir d\u2019\u00e9l\u00e9ments de preuve provenant des syst\u00e8mes, notamment les registres, les journaux et certaines donn\u00e9es.<\/p>\n\n\n\n

L\u2019examen<\/strong><\/p>\n\n\n\n

L\u2019examen portait sur certains \u00e9l\u00e9ments du processus du Centre de la s\u00e9curit\u00e9 des t\u00e9l\u00e9communications (CST) visant \u00e0 supprimer des donn\u00e9es de renseignement \u00e9lectromagn\u00e9tique (SIGINT pour Signals Intelligence) \u00e0 la suite d\u2019une demande de suppression.<\/p>\n\n\n\n

En r\u00e9ponse \u00e0 un incident de non-conformit\u00e9 signal\u00e9 par le CST en mars 2025 concernant la communication d\u2019ensembles de donn\u00e9es entre partenaires internationaux et les demandes de suppression connexes, l\u2019OSSNR a cherch\u00e9 \u00e0 \u00e9valuer la mani\u00e8re dont le CST traite la suppression de donn\u00e9es au Canada lorsque celle-ci concerne des renseignements re\u00e7us d\u2019un partenaire international.<\/p>\n\n\n\n

L\u2019OSSNR a s\u00e9lectionn\u00e9 trois demandes de suppression transmises aux syst\u00e8mes et a examin\u00e9 les syst\u00e8mes, registres et journaux de v\u00e9rification connexes afin d\u2019examiner le fonctionnement des m\u00e9canismes de contr\u00f4le. Pour certaines donn\u00e9es s\u00e9lectionn\u00e9es, l\u2019OSSNR a directement v\u00e9rifi\u00e9 qu\u2019elles avaient \u00e9t\u00e9 supprim\u00e9es des syst\u00e8mes du CST.<\/p>\n\n\n\n

Constatations<\/strong><\/p>\n\n\n\n

L\u2019OSSNR a confirm\u00e9 que les renseignements s\u00e9lectionn\u00e9s avaient \u00e9t\u00e9 supprim\u00e9s au moment de son \u00e9valuation.<\/p>\n\n\n\n

L\u2019examen a \u00e9galement permis de relever certaines lacunes dans le processus. Dans un syst\u00e8me, une demande de suppression automatique n\u2019a pas entra\u00een\u00e9 la suppression attendue, ce qui a oblig\u00e9 le personnel du CST \u00e0 supprimer l\u2019information manuellement. Le CST a aussi relev\u00e9 un autre cas o\u00f9 des renseignements qui auraient d\u00fb \u00eatre supprim\u00e9s \u00e9taient demeur\u00e9s dans un syst\u00e8me. Le CST a donc \u00e9t\u00e9 contraint de les supprimer lui\u2011m\u00eame.<\/p>\n\n\n\n

L\u2019OSSNR a constat\u00e9 que les registres de suppression du CST ne contenaient pas suffisamment de d\u00e9tails pour confirmer pr\u00e9cis\u00e9ment \u00e0 quel moment chaque renseignement avait \u00e9t\u00e9 supprim\u00e9.<\/p>\n\n\n\n

Ces constatations soul\u00e8vent des pr\u00e9occupations quant \u00e0 la fiabilit\u00e9 et \u00e0 la rapidit\u00e9 du processus de suppression, m\u00eame si, en d\u00e9finitive, les renseignements s\u00e9lectionn\u00e9s ont fini par \u00eatre supprim\u00e9s.<\/p>\n\n\n\n

Cote d\u2019assurance<\/strong><\/p>\n\n\n\n

L\u2019OSSNR a attribu\u00e9 une cote d\u2019assurance moyenne<\/strong> \u00e0 l\u2019efficacit\u00e9 du processus de suppression du CST.<\/p>\n\n\n\n

Cette cote tient compte des probl\u00e8mes relev\u00e9s au cours de l\u2019examen ainsi que des limites li\u00e9es \u00e0 la capacit\u00e9 de l\u2019OSSNR \u00e0 acc\u00e9der directement aux syst\u00e8mes du CST et \u00e0 v\u00e9rifier en toute ind\u00e9pendance le moment pr\u00e9cis o\u00f9 chaque renseignement a \u00e9t\u00e9 supprim\u00e9.<\/p>\n\n\n\n

L\u2019avenir en quelques mots<\/strong><\/p>\n\n\n\n

Les EAT ont \u00e9t\u00e9 introduits \u00e0 titre de projet pilote en 2025 afin de fournir \u00e0 l\u2019OSSNR un outil additionnel lui permettant d\u2019\u00e9valuer des activit\u00e9s techniques dans le domaine de la s\u00e9curit\u00e9 nationale, tout en mettant l\u2019accent sur la r\u00e9alisation d\u2019examens rapides, concis et transparents.<\/p>\n\n\n\n

\u00c0 la suite du projet pilote, l\u2019OSSNR a officialis\u00e9 cette nouvelle pratique et l\u2019a ajout\u00e9e aux autres types d\u2019examens qu\u2019il r\u00e9alise dans l\u2019exercice de son mandat. L\u2019OSSNR peut ainsi s\u00e9lectionner l\u2019approche la mieux adapt\u00e9e \u00e0 la nature, \u00e0 la port\u00e9e et \u00e0 la complexit\u00e9 de chaque examen.<\/p>\n<\/div><\/section>\n<\/div><\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":2200,"parent":12109,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-nsira-subpages.php","meta":{"inline_featured_image":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-17047","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nTechnical Assurance Review of a Specific Communications Security Establishment Activity: Backgrounder - National Security and Intelligence Review Agency<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nsira-ossnr.gc.ca\/fr\/examens\/nos-examens\/25-11\/fiche-dinformation-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Technical Assurance Review of a Specific Communications Security Establishment Activity: Backgrounder - 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