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The United Kingdom Electronic Travel Authorisation ( ETA) is an advance travel permission required from foreign nationals who intend to visit or transit the United Kingdom without a visa. [ 1] The system, as part of the Nationality and Borders Act 2022, operates using an online application whose information is checked against security databases.
UK Visas and Immigration. UK Visas and Immigration ( UKVI) is a division of the Home Office responsible for the United Kingdom's visa system. It was formed in 2013 from the section of the UK Border Agency that had administered the visa system.
Visa requirements for British citizens are administrative entry restrictions by the authorities of other states placed on citizens of the United Kingdom . As of 2024, British citizens had visa-free or visa on arrival access to 192 countries and territories, ranking the British passport 4th in the world according to the Henley Passport Index.
Transport Layer Security ( TLS) is a cryptographic protocol designed to provide communications security over a computer network. The protocol is widely used in applications such as email, instant messaging, and voice over IP, but its use in securing HTTPS remains the most publicly visible. The TLS protocol aims primarily to provide security ...
Security Support Provider Interface ( SSPI) is a component of Windows API that performs security-related operations such as authentication . SSPI functions as a common interface to several Security Support Providers (SSPs): [ 1] A Security Support Provider is a dynamic-link library (DLL) that makes one or more security packages available to apps.
Mutual authentication is a desired characteristic in verification schemes that transmit sensitive data, in order to ensure data security. [ 1][ 2] Mutual authentication can be accomplished with two types of credentials: usernames and passwords, and public key certificates . Mutual authentication is often employed in the Internet of Things (IoT).
Server Name Indication. Server Name Indication ( SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [ 1] The extension allows a server to present one of multiple possible certificates on the ...
To change this template's initial visibility, the |state= parameter may be used: {{TLS/SSL|state= collapsed }} will show the template collapsed, i.e. hidden apart from its title bar. {{TLS/SSL|state= expanded }} will show the template expanded, i.e. fully visible. Editors can experiment in this template's sandbox ( create | mirror) and ...