Is your mail server configured with SMTP AUTH? If not, you should do so as soon as possible. Professional spammers are happy to see every open relay that they can use for the distribution of their junk mail. Such spam is not only hassle for the receiver, but also unnecessarily increases your server traffic and damages your online reputation. This security gap can be closed with the simple ESMTP...
For years, the captcha has been a necessary evil for securing interactive web applications (e.g. online forms) against spam. The fully-automatic public Turing test distinguishes between computers and humans. The test exposes which automatic queries are performed by spam robots, which then minimises the administrative effort needed for interactive websites. We present the most common types of...
A website operator is responsible for the security of a web project as well as the content. Neglecting security may lead to hackers easily infiltrating the system through security gaps. If a malware-infected website goes unnoticed, it could cause serious damage. It is therefore important to make sure your site is fully protected.
Billions of spam e-mails are sent daily. These annoying messages cost time and get on your nerves, especially when malware finds its way onto your computer or private data falls into the wrong hands. Just a few small tricks and a bit of caution when dealing with e-mails can remedy the situation.
What do your e-mail address, eye colour, preferred political party, and license plate have in common? They can all be regarded as personal data which companies and cybercriminals can use to draw direct or indirect conclusions about your physical, physiological, genetic, psychological, economic, cultural, or social identity. It goes without saying that this sensitive information must be protected...
A professional e-mail signature is a standard part of business communication. Private users can also stand to gain from these e-mail additions. But what exactly does a good e-mail signature contain? And which information should your company include when sending messages to customers or business partners?
Every year, click fraud costs the advertising industry billions. An increasing amount of advertising operators have to deal with the fact that their ads often don’t reach their intended targets due to artificially generated clicks through the likes of link farms or bot nets that seek to deplete advertising budgets. We take a closer look at the topic of click fraud and show you some counter...
Spam e-mails may be annoying, but they’re mostly harmless. What’s more problematic is phishing – a technique whereby fraudsters try to con you by posing as trustworthy sender addresses in an attempt to get hold of sensitive data. These messages appear genuine too, because without a digital signature, it’s very easy to assume a trusted identity online. In order to protect customers and their own...
Many only know internet identity theft and similar crimes from movies or television. But stories of online fraudsters are not just merely screenwriters’ fantasies; for many the experience is all too real. Online identity theft has become more and more of a problem over the past few years, and everyone is a potential victim. We have compiled some preventative steps than can help you stay out of the...
Do you find that lots of the traffic that arrives on your site comes from suspicious sources? There’s no need to worry since website operators encounter inconsistencies in reports from analysis tools (such as Google Analytics, Piwik, or etracker). The reason: referral spam falsifies visitor statistics. Learn how hackers can manipulate referrer information and traffic data, as well as which...
