Abstract: Almost everything we do online, from checking email to paying a bill to opening an app, starts with a quick, invisible handshake called TLS, short for Transport Layer Security. In a fraction of a second, your device and the server agree on how to encrypt the connection and confirm the server is really who it says it is. How that handshake is built matters more than most people realize. It affects how fast a page loads, how much computing power a company needs to run its servers, and how safe your data stays if someone is quietly listening in.
This paper explains the four major versions of TLS, 1.0, 1.1, 1.2, and 1.3, in everyday language with real examples. We compare them on the things that actually matter: how long the handshake takes, how much server power it uses, and how well it holds up against real attacks. We also look at what is coming next: post-quantum encryption, a new safeguard against the risk that today's encrypted data could be cracked years from now by a powerful quantum computer. Every chart here is drawn from published data, including IETF standards, the Qualys SSL Pulse survey, Cloudflare's own measurements, and recent research papers, so the case for upgrading rests on evidence, not opinion.
Keywords: Security Comparison, Modern Transport, Transport Layer Security.
Title: TLS Evolution: A Performance and Security Comparison of Legacy and Modern Transport Layer Security Versions
Author: Zaki Saghir Ahmed
International Journal of Computer Science and Information Technology Research
ISSN 2348-1196 (print), ISSN 2348-120X (online)
Vol. 14, Issue 3, July 2026 - September 2026
Page No: 81-86
Research Publish Journals
Website: www.researchpublish.com
Published Date: 07-September-2026
