: A user enters their credentials (username/password) on a website or app [13].
: The server generates a unique, time-sensitive code and sends it via the mobile network to the user's registered phone number [13]. SMS Verification Method 2019.pdf
Papers from this era, such as On the Security Verification of a Short Message Service Protocol , highlighted that SMS is not inherently secure because it travels over unencrypted mobile networks [35]. : A user enters their credentials (username/password) on
: The user enters the code into the application to prove they have physical possession of the device [13]. 2. Key 2019 Regulatory Changes : The user enters the code into the
While there isn't a single definitive official document titled exactly "SMS Verification Method 2019.pdf," research from that year focused heavily on the framework and its vulnerabilities. A key paper from July 2019 titled Two Factor Authentication Framework Using OTP-SMS Based on Blockchain addresses the common security and management issues of SMS-OTP [20].
Below is an overview of the core concepts, security risks, and technical implementations as they were established or studied in 2019. 1. Core Workflow of SMS Verification
: Researchers proposed using smart contracts and distributed ledgers to generate and validate OTPs, reducing the reliance on a single central authority [20].