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KM

Kwabena Mensah

Author

Mobile security engineer at an Accra fintech, conducting penetration tests on Android and Flutter applications. Identified the JWT storage anti-pattern in three popular Flutter packages and submitted upstream patches.

mobilesecurityflutterauth

Articles by Kwabena Mensah(8)

Mobile Biometric Authentication: Integrating Passkeys and Platform-Specific APIs

This article delineates the nuances of mobile biometric authentication, emphasizing the integration of passkeys and leveraging platform-specific APIs to bolster security in mobile applications. It explores the associated vulnerabilities, potential exploitation scenarios, and offers secure alternatives alongside a responsible disclosure protocol.

mobile securitybiometric authenticationpasskeysplatform APIsvulnerabilities

22 July 2026

Semantic chunking strategies for RAG that actually improve recall

A detailed breakdown of semantic chunking strategies for retrieval-augmented generation — comparing fixed-size, sentence-boundary, recursive, and late-chunking approaches with concrete benchmarks and implementation code

ragchunkingembeddingsvector-searchretrieval

15 July 2026

Using Either for error handling in Flutter

A practical, code-first guide to using Either for error handling in Flutter. Real patterns, common pitfalls, and a checklist you can apply to production Flutter apps.

fluttererror-handlingfunctionaldartz

6 March 2026

Flutter + WebSockets: real-time communication

A practical, code-first guide to flutter + WebSockets: real-time communication. Real patterns, common pitfalls, and a checklist you can apply to production Flutter apps.

flutterwebsocketsrealtimenetworking

11 January 2026

Certificate pinning in Flutter

A practical, code-first guide to certificate pinning in Flutter. Real patterns, common pitfalls, and a checklist you can apply to production Flutter apps.

fluttersecuritynetworkingcertificate-pinning

6 November 2025

Shared preferences vs secure storage: when to use which

A practical, code-first guide to shared preferences vs secure storage: when to use which. Real patterns, common pitfalls, and a checklist you can apply to production Flutter apps.

flutterstoragesecuritypreferences

6 October 2025

GraphQL in Flutter with ferry

A practical, code-first guide to graphQL in Flutter with ferry. Real patterns, common pitfalls, and a checklist you can apply to production Flutter apps.

fluttergraphqlferrynetworking

18 August 2025