This paper aims to shed light into the operation of SafeLine, the only Greek Hotline for illegal online content, and its seventeen years of successful operation as a member of INHOPE, the International Association of Internet Hotlines. The operation of SafeLine is introduced and an analysis of the received reports during its operation is attempted, in order to reveal hidden trends over the seventeen years. Furthermore, a comparison between the reports of SafeLine and the reports of the other 48 national hotlines, members of the International Association INHOPE, operating in 43 different countries spanning six continents worldwide is presented.

Another main contribution of this paper is a correlation analysis between SafeLine's reports and dark web data. Specifically, SafeLine's reports are compared against the ALTAS dataset of the Voyager system of Web-IQ, drilled from the dark web, revealing a correlation of more than 50% between the reports received by SafeLine and the domains of illegal sites discussed in the dark web.

Last, but not least, an analysis of the legislative framework concerning Child Sexual Abuse Material (CSAM) in all country members of INHOPE, European and outside Europe is attempted, revealing similarities as well as differences in what is considered illegal, the ways CSAM is tackled, and the penalty limits prescribed in various countries.

本文旨在阐明SafeLine的运作，它是唯一的非法在线内容希腊热线，以及它作为国际互联网热线协会INHOPE的成员成功运营了十七年。介绍SafeLine的操作，并尝试对其运行过程中收到的报告进行分析，以揭示十七年来的隐藏趋势。此外，还比较了SafeLine的报告与国际48个国家的INHOPE成员的其他48条国家热线的报告，这些国家的热线遍及全球六大洲。

本文的另一个主要贡献是SafeLine报告与暗网数据之间的相关性分析。具体而言，将SafeLine的报告与从暗网中钻取的Web-IQ Voyager系统的ALTAS数据集进行比较，发现SafeLine收到的报告与暗网中讨论的非法站点的域名之间的相关性超过50％ 。

最后，但并非最不重要的是，尝试对欧洲，欧洲和欧洲以外所有INHOPE国家成员中有关儿童性虐待材料（CSAM）的立法框架进行分析，揭示了在CSAM的使用方式上被视为非法的相似之处和不同之处。解决了各国规定的刑罚限制。