IWSPA 2023 [ninth international workshop on Security and Privacy Analytics] https://sites.google.com/view/iwspa-2023/home Charlotte, North Carolina, April 26, 2023. (Submissions due January 6, 2023). This is the ninth workshop in a series of workshops on Security and Privacy Analytics. Increasingly, sophisticated techniques from machine learning, data mining, statistics and natural language processing are being applied to challenges in security and privacy fields. However, experts from these areas have had no medium in the past where they can meet and exchange ideas so that strong collaborations can emerge, and cross-fertilization of these areas can occur. Moreover, current courses and curricula in security do not sufficiently emphasize background in these areas and students in security and privacy are not emerging with deep knowledge of these topics. Hence, we propose to continue the workshop that we started in 2015 to address the research and development efforts in which analytical techniques from machine learning, data mining, natural language processing and statistics are applied to solve security and privacy security and privacy ). Over the course of these seven years, the papers published in IWSPA proceedings have been downloaded more than 32,000 times according to ACM Digital Library and have 1,000 citations on Google Scholar. Submissions of papers related to methodology, design, techniques and new directions for security and privacy that make significant use of machine learning, data mining, statistics or natural language processing are welcome. Furthermore, submissions on educational topics and systems in the field of security analytics are also highly encouraged. Proposals for tutorials on related topics are also welcome. The workshop will focus on, but is not limited to, the following areas: Natural Language Processing for Security/Privacy Data Mining Techniques for Security/Privacy Machine Learning for Security/Privacy Statistics for Security/Privacy Inference Control Privacy-Preserving Data Mining Security of Machine Learning Security of Data Mining Security of Natural Language Processing Social Network Analysis Digital and Multimedia Forensics Applications of Blockchain for Security/Privacy Case Studies and/or datasets to support security/privacy research Educational Topics and Courses The workshop is planned for one day, April 26, 2023, on the last day of the conference. All submissions must describe original research, not published nor currently under review for another workshop, conference, or journal. For more information, please see https://sites.google.com/view/iwspa-2023/home