# Felix von Leitner > German IT security expert **Wikidata**: [Q20906](https://www.wikidata.org/wiki/Q20906) **Wikipedia**: [English](https://en.wikipedia.org/wiki/Felix_von_Leitner) **Source**: https://4ort.xyz/entity/felix-von-leitner ## Summary Felix von Leitner, also known as Fefe, is a German IT security expert, software developer, and programmer. He is best known for his work as a member of the Chaos Computer Club and for maintaining the dietlibc C standard library. His contributions span computer science, software engineering, and cybersecurity, with a notable presence in the hacker and open-source communities. ## Biography - Born: 1973-08-02 - Nationality: Germany - Education: [Not specified in source material] - Known for: Founding member of the Chaos Computer Club and creator of the dietlibc C standard library - Employer(s): [Not specified in source material] - Field(s): Computer science, software development, IT security, open-source projects ## Contributions - **dietlibc**: Developed the dietlibc C standard library, a lightweight alternative to traditional libraries, which has been used in various open-source projects. - **Chaos Computer Club**: Served as a member from 1981 until 2016, contributing to the organization’s work in cybersecurity and hacker culture. - **Fefes Blog**: Maintained a personal blog at [blog.fefe.de](https://blog.fefe.de/), where he discusses IT security, software development, and related topics. - **Podcasting**: Created podcasts, as evidenced by his Podchaser creator ID. ## FAQs - **What is Felix von Leitner known for?** Felix von Leitner is known for his work as a member of the Chaos Computer Club, his development of the dietlibc C standard library, and his contributions to IT security and software development through his blog and podcasts. - **Where did Felix von Leitner work?** Felix von Leitner was a member of the Chaos Computer Club from 1981 until 2016. His other affiliations are not specified in the source material. - **What is dietlibc?** Dietlibc is a C standard library developed by Felix von Leitner, designed to be lightweight and suitable for use in environments with limited resources. - **What is the Chaos Computer Club?** The Chaos Computer Club is a German-based hackers organization founded in 1981, known for its work in cybersecurity, privacy, and digital rights. - **What languages does Felix von Leitner speak?** Felix von Leitner speaks German and English. ## Why They Matter Felix von Leitner’s contributions to the IT security and open-source communities have had a lasting impact by providing tools and resources that support software development and cybersecurity efforts. His work with the Chaos Computer Club has helped shape the organization’s mission and influence in the hacker and digital rights movements. Additionally, his blog and podcasts have provided valuable insights and discussions on IT security and software engineering, making him a notable figure in these fields. ## Notable For - Founding member of the Chaos Computer Club (1981–2016) - Creator of the dietlibc C standard library - Maintainer of the personal blog [Fefes Blog](https://blog.fefe.de/) - Podcaster with a presence on Podchaser - Active contributor to IT security and software development discussions ## Body ### Early Life and Education Felix von Leitner was born on August 2, 1973. He is a German citizen and speaks both German and English. His educational background is not detailed in the source material, but his contributions to computer science and software development suggest a strong foundation in these fields. ### Career and Affiliations Felix von Leitner was a member of the Chaos Computer Club from 1981 until 2016. The Chaos Computer Club is a prominent German-based hackers organization known for its work in cybersecurity, privacy, and digital rights. His membership in this organization reflects his involvement in the hacker and open-source communities. ### Contributions to Software Development One of Felix von Leitner’s most notable contributions is the development of the dietlibc C standard library. Dietlibc is a lightweight alternative to traditional C standard libraries, designed for use in environments with limited resources. This project has been used in various open-source projects, demonstrating its utility and reliability. ### IT Security and Cybersecurity Work Felix von Leitner has also made significant contributions to IT security through his blog and podcasts. His blog, Fefes Blog, is a platform where he discusses topics related to IT security, software development, and related fields. His podcasting work further extends his reach, providing additional insights and discussions on these subjects. ### Influence and Legacy Felix von Leitner’s work has had a lasting impact on the IT security and open-source communities. His contributions to the Chaos Computer Club and the development of dietlibc have provided valuable tools and resources that support software development and cybersecurity efforts. His blog and podcasts have also made him a notable figure in these fields, offering valuable insights and discussions to a wide audience. ## References 1. [Source](http://blog.fefe.de/?ts=a860443c) 2. [Source](https://www.semanticscholar.org/topic/Felix-von-Leitner/3997450) 3. Google Knowledge Graph 4. [Source](https://www.podchaser.com/creators/felix-von-leitner-107aNBZ6an/appearances) 5. [Internet Domains Wikibase](https://domains.wikibase.cloud/entity/Q203519)