# Security · Tech watch

[Canonical source](<https://sebastien.rigaux.be/en/tech-watch/tags/security/page/2>)

Protecting applications and infrastructure through vulnerability analysis, controls and defensive practices.

## [Verify an ALTCHA challenge on the server](<https://sebastien.rigaux.be/en/tech-watch/links/verify-an-altcha-challenge-on-the-server>)

The documentation explains generating a single-use challenge and cryptographically verifying the widget response. It separates browser responsibilities from backend verification.

2025-05-27 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/verify-an-altcha-challenge-on-the-server.md>) · [Original resource](<https://altcha.org/docs/integration/server/>)

## [ProtonURL: share content with expiry and single-use access](<https://sebastien.rigaux.be/en/tech-watch/links/protonurl-share-content-with-expiry-and-single-use-access>)

ProtonURL creates temporary links for sharing text or a file. The page offers expiry settings and an optional custom encryption key to communicate separately to the recipient.

2025-05-27 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/protonurl-share-content-with-expiry-and-single-use-access.md>) · [Original resource](<https://protonurl.com/fr>)

## [Presidio: detect and anonymize personal data](<https://sebastien.rigaux.be/en/tech-watch/links/presidio-detect-and-anonymize-personal-data>)

Presidio provides detection and anonymization modules for text and images. Built-in or custom recognizers identify names, contact details and sensitive numbers.

2025-04-22 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/presidio-detect-and-anonymize-personal-data.md>) · [Original resource](<https://data-privacy-stack.github.io/presidio/>)

## [SlimToolkit: reduce container image contents](<https://sebastien.rigaux.be/en/tech-watch/links/slimtoolkit-reduce-container-image-contents>)

SlimToolkit analyzes and optimizes container images to remove unnecessary contents. The repository documents tooling intended to reduce image size and exposure.

2024-12-14 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/slimtoolkit-reduce-container-image-contents.md>) · [Original resource](<https://github.com/slimtoolkit/slim>)

## [T3 Env: validate and separate environment variables](<https://sebastien.rigaux.be/en/tech-watch/links/t3-env-validate-and-separate-environment-variables>)

T3 Env validates configuration with a schema and separates server variables from client variables. It makes missing configuration easier to detect and helps prevent accidental browser exposure.

2024-03-23 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/t3-env-validate-and-separate-environment-variables.md>) · [Original resource](<https://env.t3.gg/docs/introduction>)

## [Gmail adds a blue badge for verified senders](<https://sebastien.rigaux.be/en/tech-watch/links/gmail-adds-a-blue-badge-for-verified-senders>)

The article covers Gmail’s blue checkmark for organizations already using BIMI. The badge is intended to help distinguish verified senders from messages impersonating them.

2023-05-05 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/gmail-adds-a-blue-badge-for-verified-senders.md>) · [Original resource](<https://techcrunch.com/2023/05/03/blue-verified-checkmarks-are-coming-to-gmail/>)

## [Model application security flows during architecture design](<https://sebastien.rigaux.be/en/tech-watch/links/model-application-security-flows-during-architecture-design>)

Damien Bod proposes security context models centered on authentication and authorization flows. The diagrams help identify trust boundaries and design mistakes before implementation.

2023-05-02 · [Markdown](<https://sebastien.rigaux.be/en/tech-watch/links/model-application-security-flows-during-architecture-design.md>) · [Original resource](<https://damienbod.com/2023/05/01/application-security-context-models/>)

Page 2 / 2

[Previous](<https://sebastien.rigaux.be/en/tech-watch/tags/security>)