Security

Man-in-the-middle attack: an overview of attack patterns

Man-in-the-middle attack: attack patterns and countermeasures

A man-in-the-middle attack is a deceitful espionage attack which aims to listen, record, or manipulate sensitive data being sent between unsuspecting internet users. To do this, hackers rely on methods that enable them to position themselves, unnoticed, between two or more computers communicating with one another. We introduce you to some well-known attack patterns and countermeasures that can be...

QUIC – the Internet Transport Protocol based on UDP

QUIC: What is behind the experimental Google Protocol?

Quick UDP Internet Connections (QUIC for short), is an experimental network protocol from Google. Further development of the protocol is being driven by IETF, which has set up a dedicated group working towards it. The QUIC protocol is intended to offer a speed-optimized alternative to the current transport standard TCP and builds on the connectionless protocol UDP to achieve this.

TAN procedures

iTAN, mTAN, chipTAN? An overview of all TAN procedures

Security in online banking has always been a cornerstone of the industry – TAN procedures like chipTAN are what make it possible. However, there are also many other variants of this two-factor authentication system that can be used to protect your banking transactions. As they say, a chain is only as strong as its weakest link – and in this case, it’s the user. Find out which TAN procedures are...

punycode

Punycode

Since the introduction of internationalised domain names in 2003, Punycode has been ubiquitous on the internet. Internet addresses like look peculiar, but fulfil an important function: They encode non-ASCII characters into ASCII-compatible character strings and therefore ensure a smooth flow in the network. How does this work, and why is Punycode criticised so often? We’ll tell you.

Using SSH keys for your network connection

How to use SSH keys for your network connection

Operating and managing a remote server located in a data centre is often carried out by using a secure network connection provided by the SSH protocol. The necessary registration on the server is preceded by an authentication process. Usually this occurs in the form of the username and password. Alternative methods such as the public key authentication used by SSH, do have their advantages. But...

Web analytics and data privacy

Web analytics: data privacy when creating a profile

Tracking tools can provide website operators with a useful indication on how to adapt an online project to suit a target group. These tools focus on user profiles, which reveal how users find the website, and which content provokes interactions. This information is based on user data, which can be subject to stringent data protection guidelines in some countries within the European Union. Find out...

SMTP-Auth

What is SMTP authentication? Secure e-mail against spam

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...

Protection against ransomware, spyware, and scareware

Ransomware, adware, etc. – how can you protect yourself?

The internet is a playground for cybercriminals and fraudsters – for many, this is an annoying and frightening reality. The threats from unwanted software range from harmless advertising to trojans, which can paralyse complete computer networks. The forms of malicious software or malware are diverse, the countermeasures often very simple. In our article, you can read about how ransomware, spyware,...

Keylogger

Keyloggers: how do they work and how do you protect yourself from them?

Keyloggers are programs or devices that get access to your credentials by recording your keystrokes. Keyloggers hide in operating system software and leak data. Some keylogger hardware is even more sophisticated, since it can document your keyboard behaviour or tap directly into the data stream. Learn how keyloggers work and which variants are available in our guide. We also give you tips on how...

DoS and DDoS: attack patterns at a glance

DoS: attack patterns and countermeasures

It is very important for a server service to always be available since this is directly related to an online company’s success. Many servers are susceptible to DoS and DDoS attacks, which cause overloads and trigger costly crashes . But which patterns do these attacks follow and which counter measures can be put into place in order to protect critical systems from being targeted?


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