A message on the Internet is sent through several networks and via different stations on its way to the target system. The individual stations are responsible for ensuring that the message is properly forwarded and finally delivered to the correct recipient. Each of these stations, if the message is sent in plain text, can receive the message and read its content. This means that a potential attacker, if he controls one of these intermediate systems, can also read the content of the message and even modify it before retransmitting it. Such attacks can have extreme effects on communication.

In this course we will look at how and whether your connection to online banking is secure or whether the content of an e-mail is trustworthy. For this purpose we will deal with the basics of cryptography, security objectives and different types of encryption. In addition, we will provide insights into different models and standards that are used in practice.

The average Internet user has more than 25 Internet accounts, which are created for a wide variety of purposes. Besides accounts for e-mail services or social networks, users need access to learning platforms or online shopping services. Each of these internet accounts represents an individual digital identity. Each of these identities in turn contains a wide variety of personal information. In addition to information used to authenticate a user, such as an e-mail address and password, other services require very personal and sensitive data, such as bank details for payment and the place of residence for the subsequent delivery of an order.

Wir kennen es aus vielen Filmen: Ein Hacker setzt sich an den Computer, tippt mit grüner Schrift auf einem schwarzen Bildschirm eine Weile und sagt: "Ich bin drin!". Was dahinter steckt ist eine Kommandozeile, ein Weg mit Computern zu interagieren, der sehr mächtig ist, aber etwas undurchsichtig wirkt.

Wir wollen uns in diesem Kurs mit der Kommandozeile des Betriebssystems Linux beschäftigen. Mit dem Betriebssystem Linux kommt man öfter in Berührung als man denkt. Linux läuft auf Handys, in smarten Lampen und auf Supercomputern.

Mit der Kommandozeile lässt sich schnell und effektiv arbeiten, man kann viele alltägliche Aufgaben automatisieren und kleinere Programme zu großen zusammenschließen.

In this course we will discuss a huge problem on the Internet: The spread of malware.
The number of cyber attacks has increased again in 2021. New forms of malware have evolved, even more disruptive and more damaging.
We will cover different types of malware, such as, viruses, worms, and trojans, talk about botnets and ransomware, and mention some countermeasures.

If you have completed the three security workshops offered on openHPI this year, you should now have a good knowledge of the basics of cybersecurity. Here we offer you the opportunity to take an exam on the material from all three workshops. If successful, you will receive a record of achievement or a qualified certificate, which is usually only awarded in 6-week courses.

You may not register for the exam until you have met the eligibility requirements. The following criteria must be met:

• Participation in the 3 Workshops Confidential Communication in the Internet, Digital Identities, Cyberthreats by Malware
  
• Proof of a confirmation of participation in each of the three workshops (access of at least 80% of the learning material)

The participation in the weekly assignments in the individual courses is not relevant for this exam.

R ist eine weit verbreitete Programmiersprache für Datenanalyse und -visualisierung, Statistik, Forschung und Wirtschaft. In diesem Kurs werden die Grundlagen der Programmierung mit R vermittelt. Zentral steht dabei die praktische Anwendbarkeit des Erlernten.

Teilnehmer:innen werden nach dem Kurs Datensätze einlesen, verarbeiten und visualisieren können. Die Inhalte entsprechen dem Paradigma guter fachlicher Praxis für eine nachvollziehbare Arbeitsweise. Damit sind sie verwendbar für transparente Forschung und reproduzierbare Workflows.