DHCP Snooping

DHCP Snooping: More Security for Your Network

DHCP snooping makes a network more secure. There are no two ways about it: DHCP makes network configuration so much easier. This is especially the case in large networks, where devices are constantly changing and the manual assignment of IP addresses is a never-ending task. Yet by using DHCP to simplify the process, you do relinquish controls, and criminals can take advantage of this. By using...

IP Spoofing: Fundamentals and counter-measures

IP Spoofing: Simple manipulation of data packets by attackers

Sending data over networks is one of the most important and highest utilised functions of the modern computer era. But the structure of the necessary TCP/IP connections makes it all too easy for criminals to intercept data packets along their way and either view or alter their contents. One of the most common methods of attack is IP spoofing, which allows DoS and DDoS attacks, among other things...

ARP Spoofing: Attacks from the internal network

ARP Spoofing – flaws in network security

When it comes to network security, administrators focus primarily on attacks from the internet. But often times, the danger lurks in the internal network. If the LAN turns out to be a blind spot in the security IT, then internal attackers have an easy time. A popular method of attack is ARP spoofing. With this, hackers switch undetected between two communication partners in order to intercept,...

HPKP: The security feature for SSL/TLS certification

HPKP: What is behind the public-key pinning extension for HTTP

SSL/TLS certificates play an increasingly important role in the transmission of sensitive data. They guarantee that data packets reach the desired addressee without any detours. Problems only arise when internet users are deliberately redirected by invalid certificates from dubious certification bodies – a scenario that can be prevented using so-called HTTP public key pinning (HPKP).

DNS over TLS

DNS over TLS: an improved security concept

The Domain Name System has a big security flaw: requests and responses are traditionally sent unencrypted. This provides Internet criminals with an ideal point of attack. Again and again, users are being directed to websites that they actually have no desire to visit. DNS over TLS acts as a deterrent. How does the security concept work?

Client to Authenticator Protocol (CTAP)

CTAP: A protocol for more security & convenience on the web

Try and imagine a world where you don’t have to memorise passwords: Thanks to FIDO2, this could soon become a reality. Authentication in online shops or for online banking can be done through a fingerprint or hardware token. The latter can communicate with laptops of PCs through a USB, NFC or Bluetooth. To enable conversations between two devices, FIDO2 uses the Client to Authenticator Protocol...

Zero-day exploit

Zero-day exploit: Explanation and protection measures

The risk for businesses to fall victim to a zero-day exploit has increased in recent years. More and more often, cybercriminals can take advantage of as-yet undiscovered weak points in business software in order to steal or manipulate data. It is difficult to protect against these attacks, but businesses can take some measures to improve their security.

What is a rootkit?

What you need to know about rootkits

If you ask the IT community which malware is the most harmful, the answer is typically not viruses, worms or Trojan horses. Experts unanimously agree that rootkits pose much greater problems even to experienced users. The rootkit’s special ability is to conceal other malware and thereby enable cybercriminals to misuse others’ computers for their own criminal activities undetected – such as for bot...

Cross-site request forgery (CSRF)

CSRF: Cross-site request forgery attacks explained

Criminals are constantly trying to exploit Internet vulnerabilities and harm users. One common type of cyberattack is a cross-site request forgery attack, or CSRF. Hackers use these attacks to make purchases and transfer money on a user’s behalf without the victim noticing. How can these attacks be prevented?

Comparison of the best antivirus programmes

Antivirus software: Which software is best?

Antivirus software has sadly become indispensable as new types of threats against your system emerge regularly. Viruses, worms, Trojan horses, and many other types of malware threaten to infect your system and could cause significant damage. To counteract these threats, software makers try to fight off malware attacks with intelligent antivirus programs. Find out which rank top in our antivirus...

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