KB Sez<p>MEET RAYHUNTER: A New Open Source Tool from EFF to Detect Cellular Spying</p><p>Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out CSS around the world</p><p><a href="https://mastodon.social/tags/CSS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CSS</span></a> (Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones into connecting to the device rather than a tower</p><p><a href="https://mastodon.social/tags/surveillance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>surveillance</span></a> <a href="https://mastodon.social/tags/Spying" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Spying</span></a> <a href="https://mastodon.social/tags/Privacy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Privacy</span></a> <a href="https://mastodon.social/tags/Protest" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Protest</span></a> </p><p><a href="https://www.eff.org/deeplinks/2025/03/meet-rayhunter-new-open-source-tool-eff-detect-cellular-spying" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">eff.org/deeplinks/2025/03/meet</span><span class="invisible">-rayhunter-new-open-source-tool-eff-detect-cellular-spying</span></a></p>