Encryption

Password protect pdf

Password protect PDFs: How to encrypt a PDF

Due to its platform independence and the option to combine text and images with navigation aids in one document, the PDF format has been one of the most popular file formats for years. But when it comes to the security of the files, the same applies as to all other digital files: Only by password protecting PDFs is the information contained in the file secured. But how do you encrypt a PDF?

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?

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.

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...


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