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?

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.

Finding a website host: how to search successfully

Host: how to find out which provider is most suitable for your project

If you want to release a new web project today, you need to find the right host. Hosts have become a popular alternative for large companies, since they enable convenient outsourcing of certain work areas or data, saving company resources. But how do you know which host and which hosting package best meets your needs? And why is the provider’s security concept such a crucial criterion nowadays?

Intrusion detection systems and prevention systems

The intrusion detection and intrusion prevention systems at a glance

A stable network is characterized not only by the appropriate hardware structures, but also by a watertight security concept. In addition to back-up solutions and intelligent fail-safe systems, protection against external access attempts is a must. Intrusion detection systems (IDS) and intrusion protection systems (IPS) are an excellent addition to the classic firewall and are therefore a sensible...

Turning off the Windows firewall

How to turn off the Windows firewall

Among other things, Windows includes a built-in firewall that protects your device from attacks by hackers and unwanted network traffic. To ensure you can use the Internet safely, you shouldn’t turn off the firewall permanently. However, you may sometimes find you need to temporarily disable it, for example, to install software. Read on to find out how to do this.

S/MIME: the standard method for e-mail encryption

S/MIME: how to encrypt and sign your e-mails

If you send an e-mail without additional security measures, it’s like sending a postcard: if everything goes as planned, the information should arrive unchanged and unread in the recipient’s inbox. However, if someone intercepts the card or the e-mail in transit, they can read the contents without any problem and make as many changes as possible. Just like you would use an opaque envelope to...

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...

Spear phishing

Spear phishing: targeted attacks on your data

Internet users are constantly the target of cyberattacks. Most attacks are easy to fend off, but a new form of scam has proven to be especially dangerous. Spear phishing messages don’t contain absurd claims or bad spelling. These deceitful messages target specific individuals and look frighteningly real. How do these attacks work?


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