How does captcha work? Many IT security measures are not developed or deployed until you encounter a concrete problem. It was the same with Captcha. This security query was developed to put a stop to spam and the unwanted use of web services by automated bots and to clearly distinguish humans from machines. But as … Read more
What is TEE(Trusted Execution Environment)? A Trusted Execution Environment creates an isolated environment, sealed off from other applications and data, for the protected execution of applications or the storage of data that requires protection. The environment can be implemented on the main processor, a dedicated processor, or a special chip. Common application areas are smartphones. … Read more
What is biometrics? Biometrics refers to the science of measuring and analyzing biological characteristics. Today, biometric procedures are used to identify or verify persons. Biometric procedures are, for example, fingerprint or face recognition. What is biometrics? Biometrics refers to the measurement and statistical analysis of people’s unique physical and behavioral characteristics. These characteristics are used … Read more
What is a Zero-Day Exploit? A zero-day exploit is a special form of exploit, i.e. the exploitation of a vulnerability where no patch exists yet for a discovered security hole. Such an exploit can be used for very dangerous because undetected, zero-day attacks that spread, for example, rootkits, remote access Trojans (RATs), or other malware. … Read more
What is Shodan? Shodan is used to find devices and systems that are permanently connected to the Internet. Shodan is also called a search engine for the Internet of Things (IoT). It searches the Internet for open TCP/IP ports and allows to filter the found systems according to certain terms and criteria. The search engine … Read more
What is Maltego? Maltego is an analysis software that allows searching and linking information on the Internet. The data mining tool visually displays the information found using directed graphs and allows further analysis. Sources for searching information include websites, social networks, search engines, or publicly available databases. Maltego is a powerful and versatile Open Source … Read more
What is Ransomware? Ransomware is malware that blocks the use of computers or data and demands a ransom for release. Methods such as file encryption are used. Well-known examples of this type of malware are CryptoLocker, WannaCry, or Locky. The term ransomware is derived from the English word “ransom”. It means ransomware. Ransomware is extortionate … Read more
What is a Password manager? No user can remember complex passwords, but password management systems can easily accommodate many combinations of any letters, numbers, and special characters. Password managers for managing access data and passwords are therefore an important security measure in the online world. In today’s digital age, the concept of a password manager … Read more
What is code injection? Code injection allows the infiltration and execution of unwanted program code due to vulnerabilities in computer programs or in web applications. This is possible, for example, if a user’s input is not sufficiently checked and passed to the interpreter. Common examples of program code injection in the web environment are Cross … Read more
What is bug in software? A bug is an error in the program code of the software. It has various effects, ranging from undesired behavior to the complete malfunction of an application or a device controlled by software. Already in the development phase, programmers try to find and eliminate bugs. Fixing a bug is called … Read more
What is smishing? Smishing is an internet fraud method. Unlike phishing, it does not use e-mails or Internet links to elicit sensitive information such as passwords from victims but uses SMS text messages. The messages ask the victim to visit a link, install software or call a phone number, for example. In the second step, … Read more
What Is Vishing? Vishing is an Internet fraud method. Unlike phishing, it does not use emails or links to obtain sensitive information such as passwords or personal data of the victim but uses the personal conversation during a phone call. On the technical side, automated voice-over-IP calls with a falsified sender number are often used. … Read more
What is OPNsense? OPNsense is an open-source firewall distribution based on the UNIX-like operating system FreeBSD. It is licensed under a 2-clause BSD license and is freely available. The software evolved from a fork of pfSense. OPNsense offers a wide range of features, is easy to use, and can be used as a firewall and … Read more
What Is a Deepfake? Deepfakes are video or audio content faked with the help of artificial intelligence (AI). Artificial Intelligence methods such as Machine Learning (ML) and Artificial Neural Networks (ANN) are used, for example, to exchange persons in video sequences or to have actors speak different texts. Some deepfake methods are applicable in real-time. … Read more
What Is Encryption? Encryption is used to transform data into a form that can no longer be read by unauthorized persons. Digital keys (key files) are used for encryption in symmetric or asymmetric encryption processes. In the digital age, where information is constantly transmitted and stored online, the security and privacy of data have become … Read more
What Is a data breach? Data theft, data manipulation, encryption of data by ransomware, or data loss, all these incidents are classified as data breaches under data protection law. Reports of data breaches are piling up and many studies are investigating the consequences of a data loss. But what exactly is meant by a data … Read more
What is Credential Stuffing? Credential stuffing is a cyberattack method that uses previously leaked or illegally obtained credentials to try them out en masse for unauthorized access at other services. The attackers assume that users use their login credentials with the same usernames and passwords at multiple services simultaneously. This attack method is one of … Read more
What is a Remote Access Trojan (RAT)? A Remote Access Trojan(abbreviated RAT) is malware that enables remote control and administrative control of a foreign computer unnoticed by the user. The manipulation possibilities of a RAT are manifold and range from spying out passwords and stealing data to unnoticed use of the webcam or microphone. Remote … Read more
What is STIX? STIX (Structured Threat Information eXpression) is a language standardized by OASIS to describe threats in the cyber environment. STIX can be read by humans directly or via tools and can be processed automatically by machines. In modern days, the importance of cybersecurity cannot be overstated. Cyberattacks have become increasingly sophisticated and prevalent, … Read more
What Is Spam? Spam or junk refers to unsolicited electronic messages that often have an advertising character. The increased volume of messages and the additional work required to sort out or process them cause considerable economic damage. In digital and AI age, we’ve all encountered the relentless deluge of spam – those unsolicited and often … Read more