The Best Altcoins

Altcoin: What are the alternatives to Bitcoin?

Bitcoin’s success has spawned hundreds of cryptocurrencies now available on the market. Known as altcoins, they try to fix Bitcoin’s weaknesses or else have a completely different focus. In this article, we present the most popular and important alternatives to Bitcoin and explain their main differences: what are the advantages and disadvantages of each cryptocurrency?

ERR_SSL_PROTOCOL_ERROR: the best solutions

ERR_SSL_PROTOCOL_ERROR: how to fix the Chrome bug

Chrome is the world’s most widely-used internet browser. The application scores points not only when it comes to security and speed, but also with its features such as cross-device synchronization of user data. But errors can occur even when surfing with Google’s wonder weapon. These can lead to the browser crashing or prevent certain pages from being accessed. The error message...

UTF-8: encoding global digital communication

UTF-8: the network standard

UTF-8 is method of Unicode character encoding, which claims to cover all modern languages for data processing. The format has significantly influenced international digital communication. But what exactly does “UTF-8” mean? And what is special about UTF-8 in the Unicode character set? Here you can find out which structure the coding is based on, and which bytes are permitted in the standard...

Honeypots: IT security through decoy programs

What is a honeypot?

Businesses use IDSs (intrusion detection systems) and firewalls in order to keep attackers away from sensitive IT systems. These safeguards can be enhanced through so-called honeypots, which bait hackers to isolated network areas where more information on their attack patterns can be collected. Find out more here on how honeypots work and with which programs honeypots can be implemented for both...

How to Protect Access to your Cloud

Using cloud services securely

In the digital age, we are increasingly resorting to cloud services: At work, people collaborate on projects together in the cloud, and in their free time, they share photos from their last vacation. At the same time, cloud storage is by no means free from security risks. The multi-cloud environments of larger companies, in particular, are becoming a challenge for cloud security. Here, we will...

Raspberry Pi: How to set up an SSH server

Raspberry Pi: activating and using SSH access

Raspberry Pi has established itself as a reliable basis for servers of various types. Access – for configuration and maintenance purposes – rarely takes place on the mini computer itself, but mostly on a desktop computer in the same network. The communication protocol is the secure SSH (secure shell), which isn’t enabled by default and hasn’t been for some time. How to activate the Raspberry Pi...

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.

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 utilized 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...

HSTS: Reliably secure your HTTPS connections

HSTS: How the HTTPS expansion works

HTTPS, the network protocol for TLS-encrypted data transfer online can be circumvented in some cases. The danger is that encrypted websites can be accessed via unencrypted HTTP. But the HTTPS extension HSTS (HTTP Strict Transport Security) forces website access via TLS encryption, closing the security gaps that hackers like to use to intercept the HTTPS connection during transport using...