A tool designed to detect AI with high precision and few false accusations

Publié le 11 July 2025 à 09h33
modifié le 11 July 2025 à 09h33

The rapid rise of artificial intelligence raises unprecedented questions about the detection of generated content. The stakes focus on the need to establish a clear boundary between human writings and automated productions. AI content systems promote an unprecedented deregulation in academic and political fields.

A new tool, Liketropy, promises to provide an innovative and accurate response in this context. *Its architecture combines two statistical concepts*: likelihood and entropy. *Through statistical tests*, this tool meticulously analyzes writings to assess their origin.

It does not merely denounce but acts with rigor to minimize the risks of false accusations. This development represents a step towards balance between recognition of AI and respect for creators.

Development of the Liketropy Tool

A team of researchers from the University of Michigan has designed a new tool, named Liketropy, to evaluate the provenance of texts, whether generated by an artificial intelligence or written by humans. This device utilizes statistical concepts such as probability and entropy, allowing for in-depth analysis without requiring prior training on specific samples.

How the Detector Works

Liketropy uses zero-shot statistical tests that can determine whether a text was produced by an advanced language model or by a person, without needing specific training data. This tool primarily focuses on large language models (LLMs), assessing inherent statistical properties of the text, such as surprise or predictability of words.

Details and Performance

During tests conducted on large-scale datasets, including those whose models were not publicly accessible, the results proved promising. The tool achieved an average accuracy exceeding 96% in tests specifically designed for a few LLMs, while maintaining a false accusation rate as low as 1%.

Ethics and Accessibility

The researchers have shown particular concern for equity, especially regarding international students and non-native English speakers. Recent studies indicate that these students may face unjust penalties due to their sentence structure or tone. This is detrimental in an academic setting. Liketropy could thus serve as an accessible self-evaluation tool, allowing these students to check the quality of their writing without pressure.

Future Applications

Tara Radvand, co-author of the study, discusses the intention to develop the tool into an adaptable solution for various fields, including law and science. A tailored approach could be applied to university admissions, taking into account notable specificities in each field.

Reducing Misinformation

A crucial application of AI detectors lies in the fight against misinformation on social media. Some AI models intentionally induce extreme behavior, thereby contributing to the spread of false ideas. Researchers emphasize the importance of developing reliable detection tools capable of flagging these harmful contents.

Collaboration with the University

The research has also sparked interest among university leaders and the business sector at the University of Michigan, who are considering integrating the tool into existing systems like U-M GPT and the AI assistant Maizey. This would allow verification of whether a text originates from these platforms or an external model like ChatGPT.

Recognition and Publication

Liketropy was awarded the Best Presentation Award at the Michigan Student Symposium for Interdisciplinary Statistical Sciences, an annual event dedicated to graduate students. Additionally, it has been highlighted by Paris Women in Machine Learning and Data Science, showcasing the growing interest in detecting AI-generated content.

The research work has been published on the preprint server arXiv, signaling its significant contribution to the field of AI detection.

Relevant Links

For further exploration of cybersecurity and AIs, check the following articles: The Impact of Code Suggestions by AI, Preventing Risks from Generative AIs, Launch of Sanqtum, a Cybersecurity Solution, Team Trained to Detect Deceptive Scientific Reporting, Strengthening Cybersecurity Measures by AI.

Frequently Asked Questions

What is the main objective of the AI detection tool?
The main objective of the tool is to detect whether a text has been generated by artificial intelligence, while minimizing the risk of false accusations against human writings.

How does this tool work to detect AI-generated texts?
The tool utilizes statistical tests, based on properties such as surprise or predictability of words, to assess whether a text is more human or machine.

What does the term “zero-shot statistical tests” mean in the context of this tool?
This term refers to tests that determine the origin of a text without requiring prior training on samples from each type of author.

What is the accuracy of the tool when detecting texts generated by LLMs?
In tests on large-scale datasets, the tool achieved an average accuracy exceeding 96%, with a false accusation rate as low as 1%.

Can the tool detect texts generated by different AI models?
Yes, although the tool is designed with specific models in mind, it has demonstrated effective detection capabilities even without prior access to these models.

Who can benefit from this AI detection tool?
Students, particularly those speaking English as a second language, can benefit from this tool to self-check their writings before submission.

What are the potential areas of application for this tool?
Beyond education, the tool could be useful in areas such as law, science, and even for verifying the authenticity of university admission applications.

How does this tool contribute to the fight against misinformation on social media?
By facilitating the early identification of AI-generated content, the tool helps limit the spread of false information and protect the integrity of public discourse.

Is the tool accessible to the public?
The researchers plan to work with institutions like the University of Michigan to adapt and integrate the tool into various applications, but its public access may evolve.

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