#Japan #Tokyo #CARTA HOLDINGS #fluct #OAuth 2.0

Engineers from CARTA HD to Speak at ID Management Study Session

CARTA HOLDINGS, located in Minato City, Tokyo, has announced that an engineer from its group company, fluct, will participate in a significant seminar named "ID沼入口" (ID Swamp Entrance). Scheduled for July 2, 2026, at KDDI Hall, this event is organized by the OpenID Foundation Japan and aims to delve into the intricacies of ID management technology.

Overview of the Session

• - Title: Understanding Authentication and Authorization: Overcoming the Unknown
• - Date and Time: July 2, 2026 (Thursday) from 17:05 to 17:55
• - Presenter: Engineer Kalloc from fluct (@calloc134)

During this session, Kalloc will address the complexities involved in learning about authentication and authorization protocols, such as OAuth 2.0 and OpenID Connect. These protocols often leave learners feeling like they have merely scratched the surface due to the myriad of related specifications and their intricate interdependencies. Kalloc will clarify why mastering these protocols can be structurally challenging and will present a systematic approach to building understanding without overwhelming the audience. Furthermore, the session will include a practical demonstration of authentication and authorization implementations using the server-side framework Hono, explaining how deep comprehension of specifications can lead to awareness of discrepancies and choices for safer configurations in actual practice.

Presenter Profile

• - Name: Kalloc
• - X Account: @calloc134
• - Background: Kalloc joined CARTA HOLDINGS as a new graduate in 2026 and currently works at fluct, focusing on the development of ad-tech systems. They are involved in projects utilizing web applications and cloud infrastructure, with a passion for deeply exploring systems and protocols as a web engineer.

About the ID Management Study Session "ID沼入口"

The "ID沼入口" study session (officially titled "Fundamentals and Security of ID Management Technology") is dedicated to the technologies surrounding ID management. As the focus on technologies such as OAuth 2.0, OpenID Connect, and passkeys rises, there is a growing realization of the barriers between understanding specifications and safely applying them in real services. This event will structure the basics of ID management beyond just authentication and authorization, sharing ideas that lead to service design and implementation. Additionally, the discussion will delve into the security considerations regarding attacks on web applications and countermeasures. Instead of merely memorizing specifications, the goal is to understand the problems these technologies aim to solve, thus enhancing the clarity of ID management. This session serves as an entry point into the world of ID management.

Event Details

• - Date: July 2, 2026 (Thursday), from 15:00 to 18:30 (Reception starts at 14:30)
• - Organizer: OpenID Foundation Japan
• - Location: KDDI Hall, KDDI Otemachi Building, 2nd floor
• - Format: Hybrid
• - Participation: Free, registration required in advance
• - Networking Events: Planned after the session
• - Event Page: ID Management Study Event

About fluct

fluct, a subsidiary of CARTA HOLDINGS (which includes NTT Docomo and Dentsu Group), operates under the vision of "Creating the Future with Publishers." The company has developed and operates one of Japan's largest Supply-Side Platforms (SSPs). In addition to the fluct SSP, the company offers a range of product development and consulting services. As a Google-certified GCPP partner, fluct collaborates with Google to support publishers' growth comprehensively. Leveraging CARTA HOLDINGS' digital marketing expertise and technological capabilities, along with NTT Docomo's data infrastructure, fluct is committed to contributing to the healthy growth of Japan's digital advertising market.

Company Details

• - Name: CARTA HOLDINGS Inc.
• - Headquarters: 2-6-1 Toranomon, Minato-ku, Tokyo 36F, Toranomon Hills Station Tower
• - CEO: Hideki Watanabe
• - COO: Manabu Takahashi
• - Establishment: June 2, 2008
• - Capital: 500 million yen (including preparatory funds)
• - Major Shareholders: CARTA HOLDINGS (NTT Docomo / Dentsu Group)
• - Business Overview: Digital marketing services and internet-related services.

For media inquiries, please contact: CARTA HOLDINGS PR