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Spam, ham, and eggs are the principal metasyntactic variables used in the Python programming language. [10] This is a reference to the famous comedy sketch, "Spam", by Monty Python, the eponym of the language. [11] In the following example spam, ham, and eggs are metasyntactic variables and lines beginning with # are comments.
Webhooks are "user-defined HTTP callbacks". [2] They are usually triggered by some event, such as pushing code to a repository, [3] a new comment or a purchase, [4] a comment being posted to a blog [5] and many more use cases. [6] When that event occurs, the source site makes an HTTP request to the URL configured for the webhook.
ver: Hashcash format version, 1 (which supersedes version 0). bits: Number of "partial pre-image" (zero) bits in the hashed code. date: The time that the message was sent, in the format YYMMDD[hhmm[ss]]. resource: Resource data string being transmitted, e.g., an IP address or email address. ext: Extension (optional; ignored in version 1).
Image spam, or image-based spam, [14] [15] is an obfuscation method by which text of the message is stored as a GIF or JPEG image and displayed in the email. This prevents text-based spam filters from detecting and blocking spam messages. Image spam was reportedly used in the mid-2000s to advertise "pump and dump" stocks. [16]
An example of an IDN homograph attack; the Latin letters "e" and "a" are replaced with the Cyrillic letters "е" and "а".The internationalized domain name (IDN) homograph attack (sometimes written as homoglyph attack) is a method used by malicious parties to deceive computer users about what remote system they are communicating with, by exploiting the fact that many different characters look ...
The spam that a user receives is often related to the online user's activities. For example, a user may have been subscribed to an online newsletter that the user considers to be spam. This online newsletter is likely to contain words that are common to all newsletters, such as the name of the newsletter and its originating email address.
The passive method of adding random words to a small spam was ineffective as a method of attack: only 0.04% of the modified spam messages were delivered. The active attack involved adding random words to a small spam and using a web bug to determine whether the spam was received. If it was, another Bayesian system was trained using the same ...
The simplest method involves spammers purchasing or trading lists of email addresses from other spammers.. Another common method is the use of special software known as "harvesting bots" or "harvesters", which uses spider Web pages, postings on Usenet, mailing list archives, internet forums and other online sources to obtain email addresses from public data.