Security Tools

This WebAuthn guide explains an authentication API intended to replace passwords with stronger authentication.

Add OpenID Connect and OAuth 2.1 identity-provider capabilities through Ory Hydra’s headless APIs.

This HTML editor supports writing and converting HTML, including Word-to-HTML conversion in a browser interface.

dnSpyEx continues the dnSpy project as a debugger and assembly editor for .NET.

Obtain a certificate for a website with Certbot, which helps configure HTTPS.

Nightfall 3's repository contains an optimistic version of the Nightfall project, according to its description.

This browser-based converter turns user-supplied text into an image file for downloading or use in other documents.

Clearstar reviews protocol governance, permissions, contracts, and oracles, then recommends fixes through its qualitative diligence process.

TRM Labs provides blockchain intelligence for investigating illicit activity, managing risk, preventing fraud, and securing protocols.

Security Onion Solutions develops and supports products related to its Security Onion security monitoring platform.

The Text and File Hash Calculator computes hashes such as MD5, SHA-1, SHA-256, SHA-512, and Whirlpool.

Find regional public webcam listings by place, with the directory aiming to cover locations around the world.

Configure DNS over HTTPS in curl, the command-line transfer tool and library.

Block hosts after repeated authentication errors with Fail2Ban, a daemon for monitoring failed logins.

SSL for Free provides SSL and wildcard certificates for enabling HTTPS on websites.

Add a proof-of-work CAPTCHA system to an application using the mCaptcha backend component.

Kryptos combines crypto portfolio tracking and tax filing with tools to build financial products across 5,500+ integrations.

B.Protocol Curator tracks data associated with B.Protocol's backstop pools for monitoring.

EverRise develops bridging and security applications for DeFi protocols across BNB Chain, Ethereum, Polygon, Fantom, and Avalanche.

OtterSec audits blockchain systems, including layer-one networks, wallets, DeFi protocols, bridges, and related infrastructure.

Favicon Hash generates a hash from a website favicon for use in Shodan searches.

Scan IP addresses and ports concurrently with rang3r, a multithreaded scanner.

Anvil runs a local Ethereum node for development and testing, with in-memory execution, funded accounts, instant mining, and chain forking.

Statemind audits smart contracts and researches blockchain systems, with published work on Vyper fuzzing and Curve stablecoin.