CARTA HD Announces Engineer from Group Company fluct to Speak at ID Management Technology Study Session "Entrance to the ID Swamp"!

CARTA HOLDINGS Inc. (Minato-ku, Tokyo; President and CEO: Hideki Watanabe; Vice President and COO: Manabu Takahashi, hereinafter "CARTA HD") is pleased to announce that an engineer belonging to its group company, fluct Inc. (hereinafter "fluct"), which develops publisher growth support services, will be a speaker at the study session "\"ID Swamp Entrance\" - ID Management Technology Study Session Starting from Basics and Security for Continuous Learning," hosted by the OpenID Foundation Japan, to be held on July 2, 2026 (Thu) at KDDI Hall.

Presentation Overview

- Title: "Learning Through Authentication and Authorization: How to Eliminate 'I Don't Understand'"

- Date and Time: July 2, 2026 (Thu) 17:05 - 17:55

- Speaker: Kalloc (@calloc134), Engineer at fluct Inc.

- Session Content:

Authentication and authorization protocols such as OAuth 2.0 and OpenID Connect are areas where, despite learning them, one often feels they have only "scratched the surface and don't truly grasp it" due to the large number of related specifications and the complexity of their dependencies.

This session will organize why learning authentication and authorization protocols is structurally difficult and introduce a learning approach for building understanding systematically and without strain. Furthermore, using authentication and authorization related implementations in the server-side framework Hono as a case study, it will explain "how deep understanding of specifications can be applied to practical tasks such as noticing discrepancies and choosing safer configurations."

【Speaker Profile】

- Name: Kalloc

- X Account: @calloc134

- Biography:

Joined CARTA HOLDINGS Inc. as a new graduate in 2026. Currently involved in the development of ad-tech systems at group company fluct Inc., handling development using web applications and cloud infrastructure. A web engineer who enjoys deeply exploring mechanisms and protocols.

About the ID Management Technology Study Session "\"ID Swamp Entrance\""

This study session (official name: "\"ID Swamp Entrance\" - ID Management Technology Study Session Starting from Basics and Security for Continuous Learning") is a study session themed around ID management technologies.

Technologies related to ID management, such as OAuth 2.0, OpenID Connect, and Passkeys, are gaining attention. While the spread of generative AI has lowered the barrier to reading specifications, there is a significant gap between "understanding specifications" and "safely utilizing them in real services." This event will organize the basics of "ID management" that go beyond just authentication and authorization, and share ways of thinking that lead to service design and implementation. It will also delve into key security considerations from the perspective of attacks and countermeasures against web applications. It is an event that serves as an "entrance to the ID swamp," aiming to increase understanding of ID management by understanding "what problems these technologies are designed to solve," rather than just memorizing individual specifications.

【Event Overview】

- Date and Time: July 2, 2026 (Thu) 15:00 - 18:30 (Reception starts at 14:30)

- Organizer: OpenID Foundation Japan

- Venue: KDDI Hall (KDDI Otemachi Building 2F)

- Format: Hybrid

- Participation Requirements: Free / Pre-registration required

- Networking Event: Scheduled to be held

- Event Page: https://openid.connpass.com/event/396041/

About fluct Inc.

fluct Inc., a group company of CARTA HOLDINGS Inc. (NTT DOCOMO, INC. / Dentsu Group Inc.), operates one of Japan's largest SSPs with the vision of "Creating the Future of Publishers, Together with Publishers."

In addition to fluct SSP, the company develops and operates a variety of products and provides consulting services. As a Google certified "GCPP Partner," fluct collaborates with Google to provide comprehensive support for publisher growth. Leveraging the digital marketing expertise and technological capabilities of the CARTA HOLDINGS group and the data infrastructure of NTT DOCOMO, the company contributes to the healthy development of the domestic digital advertising market.

【fluct Inc.】https://corp.fluct.jp/

CEO: Yota Fujii

COO: Takeshi Kuroda

Head Office: Toranomon Hills Station Tower 36F, 2-6-1 Toranomon, Minato-ku, Tokyo

Established: June 2, 2008

Capital: 50 million yen (including reserves)

Major Shareholders: CARTA HOLDINGS Inc. (NTT DOCOMO, INC. / Dentsu Group Inc.)

Business Activities: Advertising Platform Business, Publisher Growth Business, Commerce Support Business

Company Name

CARTA HOLDINGS Inc.

Head Office

Toranomon Hills Station Tower 36F, 2-6-1 Toranomon, Minato-ku, Tokyo

Representative

President and CEO, Executive Officer: Hideki Watanabe

Vice President and COO, Executive Officer: Manabu Takahashi

Major Shareholders

NTT DOCOMO, INC. Dentsu Group Inc.

Business Activities

Digital Marketing Business / Internet Related Services Business

Contact for Media Inquiries

CARTA HOLDINGS Inc. Public Relations Department

https://cartaholdings.co.jp/contact/pr/form/