pr\u00e9sentent l\u2019AVIS DE SOUTENANCE de Madame Tiphaine HENRY <\/p>\n\n\n\n
Autoris\u00e9e \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en :<\/p>\n\n\n\n
le MERCREDI 16 NOVEMBRE 2022 \u00e0 14h00<\/p>\n\n\n\n
Amphi 4
Institut Mines-T\u00e9l\u00e9com 19 place Marguerite Perey 91120 Palaiseau<\/p>\n\n\n\n
Membres du jury :<\/strong><\/p>\n\n\n\n M. Walid GAALOUL<\/strong>, Professeur, T\u00e9l\u00e9com SudParis, Institut Polytechnique de Paris, Samovar, France, FRANCE – Directeur de th\u00e8se La technologie blockchain peut \u00eatre utilis\u00e9e comme outil de d\u00e9sinterm\u00e9diation fiable pour la gestion des processus m\u00e9tiers inter-organisationnels. Elle assure la tra\u00e7abilit\u00e9 de l’ex\u00e9cution des activit\u00e9s et du flux de contr\u00f4le. Cependant, assurer la confiance dans le protocole de d\u00e9ploiement et d’ex\u00e9cution, permettre la flexibilit\u00e9 des processus et respecter la confidentialit\u00e9 des donn\u00e9es restent trois verrous \u00e0 solutionner dans cet environnement. Pour r\u00e9soudre les probl\u00e9matiques susmentionn\u00e9es , nous pr\u00e9sentons les contributions suivantes. D’abord, nous pr\u00e9sentons un m\u00e9canisme de d\u00e9ploiement et d’ex\u00e9cution on\/off-chain pour les processus chor\u00e9graphiques. Cette solution assure une s\u00e9paration fiable des vues entre les participants \u00e0 chaque \u00e9tape du d\u00e9ploiement et de l’ex\u00e9cution des instances. Ce faisant, nous tirons parti d’un langage de mod\u00e8le de processus m\u00e9tiers d\u00e9claratif, DCR, qui permet d\u2019abstraire le flux de contr\u00f4le. Deuxi\u00e8mement, nous proposons un m\u00e9canisme de changement d\u2019instances de chor\u00e9graphies DCR en cours d’ex\u00e9cution sur la blockchain. Un changement affectant d’autres partenaires est propag\u00e9 aux processus concern\u00e9s via un contrat intelligent. Nous proposons \u00e9galement une s\u00e9lection dynamique de fournisseurs de services g\u00e9r\u00e9e par contrat intelligent. Enfin, nous proposons deux m\u00e9canismes pr\u00e9servant la confidentialit\u00e9 des ench\u00e8res et des paiements dans un contexte blockchain. Le premier m\u00e9canisme se base sur du chiffrement enti\u00e8rement homomorphe. Les calculs g\u00e9r\u00e9s par la blockchain op\u00e8rent sur des nombres chiffr\u00e9s. Le deuxi\u00e8me m\u00e9canisme utilise une banque et un jeton de paiement (NFT) \u00e0 valeur al\u00e9atoire. Les partenaires utilisent ces jetons pour proc\u00e9der \u00e0 plusieurs paiements tout en pr\u00e9servant la confidentialit\u00e9 des valeurs. Nous d\u00e9montrons la faisabilit\u00e9 de chaque contribution au travers d\u2019un prototype et son efficacit\u00e9 via des exp\u00e9rimentations ancr\u00e9es dans le domaine logistique.<\/p>\n\n\n\n Blockchain technology has been introduced as a trustworthy disintermediation tool for managing cross-organizational business processes in the past decade. It ensures activities’ execution traceability while enforcing the control flow agreed upon at design time with other partners. However, ensuring trust in the deployment and execution protocol, process flexibility, and data privacy remains challenging in this environment. To address these challenges, we propose the three following contributions in this manuscript. First, we design and implement an on\/off-chain deployment and execution strategy for on\/off-chain choreographies, which enforces a trustworthy separation of concern between participants at each step of the deployment and execution. Meanwhile, we leverage a constraint-based business model language, DCR, abstracting the control flow under a set of constraints. Second, we propose to bring control-flow flexibility to the blockchain-based business process management system through change management: a change impacting other partners is propagated to affected processes using a smart contract. We also leverage smart contracts for a dynamic selection of service providers. The system analyses service providers’ performance stored as blockchain logs and dynamically decides on the allocation of a task based on the QoS outputs. Finally, we propose two mechanisms to reconcile privacy imperatives with the benefits of blockchain. The first mechanism leverages fully homomorphic encryption for blockchain-based calculations such as sealed-bid auctions. Smart contracts gather and orchestrate bid comparison, while a computation oracle carries comparisons over ciphered data. The second mechanism leverages banks as trustworthy intermediaries while secreting the payment value. Partners can use per-collaboration tokens backed by a random value to proceed to multiple payments confidentially. We demonstrate the feasibility of each contribution through an implemented prototype and its effectiveness via experiments anchored in the logistics domain.<\/p>\n","protected":false},"excerpt":{"rendered":" L’Ecole doctorale : Ecole Doctorale de l’Institut Polytechnique de Pariset le Laboratoire de recherche SAMOVAR – Services r\u00e9partis, Architectures, MOd\u00e9lisation, Validation, Administration des R\u00e9seaux pr\u00e9sentent l\u2019AVIS DE SOUTENANCE de Madame Tiphaine HENRY Autoris\u00e9e \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en : Informatique […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[],"footnotes":""},"categories":[286,549],"tags":[],"class_list":["post-4904","post","type-post","status-publish","format-standard","hentry","category-fractualites-ennews-fr","category-seminaire-acmes","entry"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/4904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=4904"}],"version-history":[{"count":2,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/4904\/revisions"}],"predecessor-version":[{"id":4911,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/4904\/revisions\/4911"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=4904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=4904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=4904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
M. Alexander NORTA<\/strong>, Professor, Tallinn University of Technology , ESTONIE – Rapporteur
M. Thomas HILDEBRANDT<\/strong>, Professor, ITU DK, DANEMARK – Rapporteur
Mme Sara TUCCI<\/strong>, Cadre scientifique, CEA List, FRANCE – Examinatrice
Mme Chirine GHEDIRA<\/strong>, Professeure des universit\u00e9s, Univ. Lyon, Universit\u00e9 Jean Moulin Lyon 3, LIRIS, UMR5205, IAE Lyon School of Management, FRANCE – Examinatrice
M. Emmanuel BERTIN<\/strong>, Ing\u00e9nieur de recherche, Orange, FRANCE – Examinateur
M. Nassim LAGA<\/strong>, Ing\u00e9nieur de recherche, Orange, FRANCE – Co-encadrant de th\u00e8se
M. Joaquin GARCIA<\/strong>, Professeur, T\u00e9l\u00e9com SudParis, FRANCE – Examinateur<\/p>\n\n\n\n
R\u00e9sum\u00e9 :<\/strong><\/p>\n\n\n\n
Abstract : \u00ab\u00a0Towards trustworthy, flexible, and privacy-preserving peer-to-peer business process management systems\u00a0\u00bb<\/strong><\/p>\n\n\n\n