TLS

Transport Layer Security protocol

TLS

(1) See transparent LAN service.

(2) (Transport Layer Security) A security protocol from the IETF that is used to create an encrypted connection between the user's browser and a Web server. TLS also uses digital certificates to authenticate the server. For certain transactions, the client can be authenticated as well, but this is not necessary with normal browser interaction as public websites accept all visitors.

TLS is based on and supersedes Secure Sockets Layer 3.0 (SSL 3.0). Using stronger encryption algorithms than SSL, which has since been deprecated, TLS and SSL are not interoperable.

HTTPS Protocol and Port Number 465
A TLS session starts by sending a request to the Web server with an HTTPS prefix in the URL, which inserts TLS port number 465 into the packets. See well-known port and HTTPS.

The TLS client uses the public key to encrypt a random number and send it back to the server. The random number, combined with additional random numbers previously sent to each other, is used to generate a secret session key to encrypt the subsequent message exchange. See HMAC, digital certificate and EAP.

The Handshake

These steps take place to negotiate a TSL (or SSL) session before any user data are transmitted. The algorithm mentioned is the encryption method. In steps 5 and 6, the checksums ensure that the message was not tampered with (see MAC).

TLS

Acronym	Definition
TLS➣Transport Layer Security
TLS➣Tulsa (Amtrak station code; Tulsa, OK)
TLS➣Times Literary Supplement
TLS➣Timor Leste (East Timor ISO code)
TLS➣Terrestrial Laser Scanning (earth science)
TLS➣Thread Local Storage
TLS➣Typed Letter Signed (autographs)
TLS➣Tumor Lysis Syndrome
TLS➣Total Least Squares
TLS➣Triple Link Suspension
TLS➣Transparent LAN Service
TLS➣Tunable Laser Source
TLS➣Through Life Support
TLS➣Transaction Layer Security
TLS➣Trans Link Systems (Dutch joint venture)
TLS➣The Last Supper
TLS➣Trinity Lutheran School
TLS➣Transmission Line Systems
TLS➣Technical Library Supplement
TLS➣Terminal Server Licensing
TLS➣Three Letter Shortcut
TLS➣Tax & Legal Services
TLS➣Transperfect Legal Solutions (New York, NY)
TLS➣Transponder Landing System
TLS➣Top Level School (USMC)
TLS➣Third Level Support
TLS➣The Learning Station (band; Melbourne, FL)
TLS➣Toyota Logistics Services (est. 1976; Toyota Motor Sales)
TLS➣Thought Leadership Summit
TLS➣The Last Samurai (movie)
TLS➣Transaction Level Security
TLS➣Target Level of Safety (aviation)
TLS➣Tons of Liquid Steel
TLS➣Text Library System (Financial Planning Consultants, Inc.)
TLS➣Tactical Landing System
TLS➣Total Logistics Support
TLS➣Total Logistics Support (Navy)
TLS➣Tekniska Litteratursällskapet (Swedish Society for Technical Documentation)
TLS➣Top Level Specification
TLS➣Target LAN Server
TLS➣The Living Statues (band)
TLS➣Taiwan Light Source
TLS➣The Logan School (Denver, Colorado)
TLS➣Tactical Logistics Systems
TLS➣Transport LAN Service (US West)
TLS➣Toulouse, France - Blagnac (Airport Code)
TLS➣Teclas Locos Salvatruchos (Maryland; Mara Salvatrucha clique)
TLS➣Tactical Laser System (Ace Combat; video game)
TLS➣Terminology and Lexical Semantics (International Workshop)
TLS➣Thermal Laser Stimulation
TLS➣Time Line Sheet
TLS➣Transmitter Location Systems, LLC
TLS➣Timber Laminated Stringer
TLS➣Thang Long Securities (Vietnam)
TLS➣Transformed Least Squares
TLS➣Turbo Lycoming Sabre (aircraft engine)
TLS➣Table of shared Locked States
TLS➣Thesaurus & Linguistic Integrated System (IBM)
TLS➣Two-Layer Spreading
TLS➣Tactical Landing Strip
TLS➣Training-Leader Development-Soldier Support
TLS➣Time Labor System
TLS➣Trimmed Leaf Size (printing/publishing)
TLS➣Theater Logistics Station
TLS➣Translocated in Liposarcoma-associated protein
TLS➣Transmission-Line Stamp
TLS➣Transfer-Line Spill
TLS➣Transmit Level Sensor
TLS➣Trans-cowl Locking System (Pratt & Whitney)
TLS➣Travel Leadership Summit
TLS➣Time-Line Summary
TLS➣Trzy Literowy Skrót (Polish: three letter acronym)
TLS➣Triple Lead Sheath