Author name: Joseph Dugu Nartey

USSD application development workflow showing a Python code editor with USSD callback logic connected via API to a mobile phone displaying a USSD menu with Ghana carrier badges

How to Create a USSD Code: Developer Guide for Africa

How to Create a USSD Code: What Is USSD and How Does It Work? USSD (Unstructured Supplementary Service Data) is a real-time, session-based communication protocol built into every GSM network. Dial *920*100# on any phone and you’re using it. Unlike SMS, USSD creates a live session between the user’s handset and your application server. That

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OTP security best practices: a green security shield protecting a one-time passcode, the code arriving on a mobile device over an encrypted connection, beside a secured OTP API with a protected API key.

OTP API Security: Best Practices for Secure Transactions (2026)

A one-time password (OTP) adds a second factor that makes a stolen password far less useful. But the OTP itself is a target — attackers phish it, intercept it, swap the SIM it’s sent to, and replay it. This is a developer’s playbook of OTP security best practices: the real attacks OTP authentication faces, the

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