Look up whitelist in
Wiktionary, the free dictionary.

See also wikipedia:whitelist A whitelist is a list of accepted items or persons in a set. This list is inclusionary, confirming that the item being analyzed is acceptable. It is the opposite of a blacklist which confirms that items are not acceptable. Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... A blacklist is a list or register of entities who, for one reason or another, are being denied a particular privilege, service, or mobility. ...

E-mail whitelists

An e-mail whitelist is a list of contacts that the user deems are acceptable to receive email from and should not be sent to the trash folder. Wikipedia does not yet have an article with this exact name. ...

Spam filters that come with e-mail clients have both white and black lists of senders and keywords to look for in e-mails. If a spam filter keeps a whitelist, mail from the listed e-mail addresses, domains, and/or IP address will always be allowed. A mail filter is a piece of software which takes an input of an email message. ... {{ #REDIRECT [[ --216. ... In computer science, a keyword is an identifier which indicates a specific command. ... A KMail folder full of spam emails collected over a few days. ... An -mail address identifies a location to which e-mail messages can be delivered. ... Look up domain in Wiktionary, the free dictionary. ... This article or section does not cite any references or sources. ...

Internet service providers have whitelists that they use to filter e-mail to be delivered to their customers. ISPs receive requests from legitimate companies to add them to the ISP whitelist of companies. Companies either pay for a time period to be allowed to e-mail their customers or the companies pay per complaint received by the ISP from their customers. These payments per complaint increase incrementally: ie. The first 10 complaints are $10 each. The next 10 are $20 each. These funds are then used by the ISPs to fund anti-spam programs to prevent unwanted e-mail. “ISP” redirects here. ...

If a white list is exclusive, only e-mail from those on the white list will get through. If it is not exclusive, it prevents e-mail from being deleted or sent to the junk mail folder by the spam filter. Usually, only end-users would set a spam filter to delete all e-mails from sources not on the white list, not internet service providers or e-mail services.

Using whitelists and blacklists can assist in blocking unwanted messages and allowing wanted messages to get through, but they are not perfect. E-mail whitelists are used to reduce the incidence of false positives, often based on the assumption that most legitimate mail will be from a relatively small and fixed set of senders. To block a high percentage of spam, e-mail filters have to be continuously updated as e-mail spam senders create new email addresses to e-mail from or new keywords to use in their e-mail which allows the e-mail to slip through. Type I errors (or α error, or false positive) and type II errors (β error, or a false negative) are two terms used to describe statistical errors. ...

Note: Whitelisting can sometimes be perceived as a derogatory term; racially charged. Whitelisting and blacklisting are also referenced as "safe senders list" and "blocked list".

Commercial whitelists

Commercial whitelists are a system by which an internet service provider allows someone to bypass spam filters when sending e-mail messages to its subscribers, in return for a small pre-paid fee (typically a fraction of a cent) per message sent. A sender can then be sure that his messages have reached their recipients without being blocked, or having links or images stripped out of them, by spam filters. The purpose of commercial whitelists is to allow companies to reliably reach their customers by e-mail. “ISP” redirects here. ... A mail filter is a piece of software which takes an input of an email message. ... Wikipedia does not yet have an article with this exact name. ... A two-cent euro coin A United States penny, or 1¢ In currency, the cent is a monetary unit that equals 1/100 of the basic unit of value. ...

Commercial providers include Sender Score Systems (formerly Bonded Mail), SuretyMail (formerly ISIPP IADB), and GoodMailSystems's CertifiedEmail(tm) product. Goodmail made headlines in February 2006 when America Online and Yahoo announced plans to implement it. AOL has stated that mail from senders who have prepaid 1/4 cent per message (AOL has announced free programs with SuretyMail and Habeas for non-profits) will be delivered directly to users' mailboxes without being subject to spam filters. The messages will be clearly identified to the user as having come from a trusted source. These senders must pass a system of accreditation with Goodmail, and their messages must only be sent to people who have a pre-existing business relationship with the sender. If a sender sends a message to a user who has not previously agreed to receive it, AOL may entirely block the sender. To meet Wikipedias quality standards, this article may require cleanup. ... Yahoo! - Wikipedia, the free encyclopedia /**/ @import /skins-1. ...

Free e-mail on AOL's service will continue to work as it always has, and a user will continue to receive all messages from a sender whom he has whitelisted. AOL subscribers will not be charged for sending or receiving e-mail, and senders who do not prepay AOL will have their messages subject to the same spam filters as before.

LAN whitelists

Another use for whitelists is local area network (LAN) security. Many network admins setup MAC address whitelists or a MAC address filter to control who is on their networks. This is used when encryption is not a practical solution or in tandem with encryption. However, it's sometimes ineffective because a MAC address can be faked. LOCAL AREA NETWORK Local area network scheme A local area network is a computer network covering a small geographic area, like a home, office, or group of buildings. ... In computer networking a Media Access Control address (MAC address) or hardware address or adapter address is a quasi-unique identifier attached to most network adapters (NICs). ... In computer networking a Media Access Control address (MAC address) or hardware address or adapter address is a quasi-unique identifier attached to most network adapters (NICs). ...

Program whitelists

If an organization keeps a white list of software, only titles on the list will be accepted for use. For example, a school might whitelist MATLAB and Netscape Navigator, thus allowing only those programs to be used on its computers. The benefits of whitelisting in this instance are that the school administration can ensure itself that students will not be able to download and/or use programs that have not been deemed appropriate for use. Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ... MATLAB is a numerical computing environment and programming language. ... Netscape Navigator, also known as Netscape, was a proprietary web browser that was popular during the 1990s. ...

Anti virus whitelists

An emerging approach in combating viruses and malware is to whitelist software which is considered safe to run, blocking all others. Some deem this as superior to the standard anti-virus approach of blocking/removing known harmful software (essentially blacklisting), as the standard approach generally means that exploits are already in the wild. Criticisms of this approach often state that the list of acceptable software is substantially larger than the list of malware, making centralized application list management approaches unwieldy.

To overcome the cumbersome overhead associated with generating and maintaining a global whitelist, new approaches using self-learning whitelists have been found to be effective and to provide management efficiencies. Information asssurance techniques such as Malware Spread Mitigation employ self-derived key generation which eliminate the reliance on centralized application approval databases. Malware Spread Mitigation is a computer security technique designed to remove the means of individual and wide spread computing system infection by applying a combination of unique cryptographic hashing algorithms and the principles of application execution in single or multitasking operating systems. ...