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Trusting a large number of CAs might be a problem because any breached CA could issue a certificate for any domain name. DANE enables the administrator of a domain name to certify the keys used in that domain's TLS clients or servers by storing them in the Domain Name System (DNS).
For example, a web site using SSL, typically the DNS site name "www.foobar.com" is verified in a browser by the software using libraries that would check to see if the certificate was signed by one of the trusted root certificates given to the user. Therefore, creating trust for users that they had reached the correct web site via HTTPS.
In ADFS, identity federation [4] is established between two organizations by establishing trust between two security realms. A federation server on one side (the accounts side) authenticates the user through the standard means in Active Directory Domain Services and then issues a token containing a series of claims about the user, including their identity.
A domain controller is a server running the Active Directory Domain Services (AD DS) role. It authenticates and authorizes all users and computers in a Windows domain-type network, assigning and enforcing security policies for all computers and installing or updating software.
User Account Control (UAC) is a mandatory access control enforcement feature introduced with Microsoft's Windows Vista [1] and Windows Server 2008 operating systems, with a more relaxed [2] version also present in Windows 7, Windows Server 2008 R2, Windows 8, Windows Server 2012, Windows 8.1, Windows Server 2012 R2, Windows 10, and Windows 11.
A receiving SMTP server wanting to verify uses the domain name and the selector to perform a DNS lookup. [8] For example, given the example signature above: the d tag gives the author domain to be verified against, example.net ; the s tag the selector, brisbane. The string _domainkey is a fixed part of the specification.
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It can involve high-trust, high-security scenarios as well as low-trust, low-security scenarios. The levels of identity assurance that may be required for a given scenario are also being standardized through a common and open Identity Assurance Framework. It can involve user-centric use-cases, as well as enterprise-centric use-cases.