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  2. Digest access authentication - Wikipedia

    en.wikipedia.org/wiki/Digest_access_authentication

    In contrast, basic access authentication uses the easily reversible Base64 encoding instead of hashing, making it non-secure unless used in conjunction with TLS. Technically, digest authentication is an application of cryptographic hashing with usage of nonce values to prevent replay attacks .

  3. Basic access authentication - Wikipedia

    en.wikipedia.org/wiki/Basic_access_authentication

    The resulting string is encoded into an octet sequence. The character set to use for this encoding is by default unspecified, as long as it is compatible with US-ASCII, but the server may suggest the use of UTF-8 by sending the charset parameter. [9] The resulting string is encoded using a variant of Base64 (+/ and with padding).

  4. Character encodings in HTML - Wikipedia

    en.wikipedia.org/wiki/Character_encodings_in_HTML

    As of HTML5 the recommended charset is UTF-8. [3] An "encoding sniffing algorithm" is defined in the specification to determine the character encoding of the document based on multiple sources of input, including: Explicit user instruction; An explicit meta tag within the first 1024 bytes of the document

  5. data URI scheme - Wikipedia

    en.wikipedia.org/wiki/Data_URI_scheme

    An optional base64 extension base64, separated from the preceding part by a semicolon. When present, this indicates that the data content of the URI is binary data , encoded in ASCII format using the Base64 scheme for binary-to-text encoding .

  6. Meta element - Wikipedia

    en.wikipedia.org/wiki/Meta_element

    Meta elements can be used to specify page description, keywords and any other metadata not provided through the other head elements and attributes. [ 1 ] The meta element has two uses: either to emulate the use of an HTTP response header field , or to embed additional metadata within the HTML document.

  7. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    Accept-Charset: Character sets that are acceptable. Accept-Charset: utf-8: Permanent RFC 9110: Accept-Datetime: Acceptable version in time. Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT: Provisional RFC 7089: Accept-Encoding: List of acceptable encodings. See HTTP compression. Accept-Encoding: gzip, deflate: Permanent RFC 9110: Accept-Language

  8. Unicode and HTML - Wikipedia

    en.wikipedia.org/wiki/Unicode_and_HTML

    Web pages authored using HyperText Markup Language may contain multilingual text represented with the Unicode universal character set.Key to the relationship between Unicode and HTML is the relationship between the "document character set", which defines the set of characters that may be present in an HTML document and assigns numbers to them, and the "external character encoding", or "charset ...

  9. Media type - Wikipedia

    en.wikipedia.org/wiki/Media_type

    In this example, text is the type, html is the subtype, and charset=UTF-8 is an optional parameter indicating the character encoding. Types, subtypes, and parameter names are case-insensitive. Parameter values are usually case-sensitive, but may be interpreted in a case-insensitive fashion depending on the intended use.