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Mutual authentication or two-way authentication (not to be confused with two-factor authentication) refers to two parties authenticating each other at the same time in an authentication protocol. It is a default mode of authentication in some protocols ( IKE, SSH) and optional in others ( TLS ). Mutual authentication is a desired characteristic ...
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 visa policy of the United Kingdom is the policy by which His Majesty's Government determines visa requirements for visitors to the United Kingdom, and the Crown dependencies of Guernsey, Jersey, and the Isle of Man and those seeking to work, study or reside there. All visitors must obtain a visa from one of the British diplomatic missions ...
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.
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 ...
Smart Traveler Enrollment Program. The Smart Traveler Enrollment Program (STEP) is a service provided by the U.S. Department of State for U.S. citizens and nationals traveling and living abroad to enroll their trip with the nearest U.S. embassy or consulate. [ 1][ 2][ 3]
Let's Encrypt is a non-profit certificate authority run by Internet Security Research Group (ISRG) that provides X.509 certificates for Transport Layer Security (TLS) encryption at no charge. It is the world's largest certificate authority, [ 3 ] used by more than 300 million websites , [ 4 ] with the goal of all websites being secure and using ...
v. t. e. A UK Ancestry visa is a visa issued by the United Kingdom to Commonwealth citizens with a grandparent born in the United Kingdom, Channel Islands, Isle of Man or Ireland (before 1922) who wish to work in the United Kingdom. It is used mainly by young Canadians, Australians, New Zealanders and South Africans of British descent coming to ...