Anti-spam

reCAPTCHA Inc. is a corporation owned by its parent company Google, which produces the CAPTCHA system. It serves to web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images. Version 2 also asked users to decipher text or match images if the analysis of cookies and canvas rendering suggested the page was being downloaded automatically. Since version 3, reCAPTCHA will never interrupt users and is intended to run automatically when users load pages or click buttons.

software that can remove or alter advertising content from a web page, website, or a mobile app

email authentication method designed to detect email spoofing

simple email-validation system designed to detect email spoofing

problem caused by profanity filters on the Internet

computer program for e-mail spam filtering

Domain-based Message Authentication, Reporting and Conformance (DMARC) is an email authentication protocol. It is designed to give email domain owners the ability to protect their domain from unauthorized use, commonly known as email spoofing. The purpose and primary outcome of implementing DMARC is to protect a domain from being used in business email compromise attacks, phishing email and email scams.

Truecaller is a smartphone application that has features of caller ID, call-blocking, flash-messaging, call-recording (on Android up to version 8), chat and voice by using the Internet. It requires users to provide a standard cellular mobile number for registering with the service. The app is available for Android and iOS.

processing of email to organize it according to specified criteria

technique for filtering spam e-mail

methods, strategies, and techniques to prevent and counter unwelcome mass messaging

method to block host for e-mail spam

method of defending e-mail users against spam

Hashcash is a proof-of-work system used to limit email spam and denial-of-service attacks. Hashcash was proposed in 1997 by Adam Back and described more formally in Back's 2002 paper "Hashcash – A Denial of Service Counter-Measure". In Hashcash the client has to concatenate a random number with a string several times and hash this new string. It then has to do so over and over until a hash beginning with a certain number of zeros is found.

Finnish company

anti-web scraping software

Whoscall is a mobile application that offers caller identification services developed by Gogolook Co., Ltd., a listed company in Taiwan.

national data protection authority of Spain

Failed anti-spoofing proposal

Russian programmer

Postini, Inc. was an e-mail, Web security, and archiving service owned by Google from 2007 until its closure. It provided cloud computing services for filtering e-mail spam and malware (before it was delivered to a client's mail server), offered optional e-mail archiving, and protected client networks from web-borne malware. In November 2011, Google announced the discontinuation of Postini in August 2012.

Programming language that can be used for email filtering

American journalist specializing in cybersecurity

Computer Security Industry entrepreneur and researcher

The GTUBE ("Generic Test for Unsolicited Bulk Email") is a 68-byte test string used to test anti-spam systems, in particular those based on SpamAssassin. In SpamAssassin, it carries an anti-spam score of 1000 by default, which would be sufficient to trigger any installation.

company which delivers network solutions

information security and anti-spam techniques in networking