Darknet Diaries is hosted and narrated by Jack Rhysider, who frames each episode as a specific, real incident rather than general tech news or commentary. The format alternates between one-on-one interviews with security practitioners recounting their own experiences and narrated historical episodes that reconstruct events using archival material and named sources. Interview episodes have featured an application security specialist describing a botched early pen test and a government data breach she learned about from a journalist, an anonymous IT operations lead managing security across a multi-site European manufacturer, and a Swedish programmer describing his arrest in Ecuador on an anonymous tip tied to the Julian Assange case. Narrated episodes cover topics such as the 1984 AT&T breakup, phone phreaking, bulletin board systems, and the founding of the Legion of Doom, drawing on figures like Lloyd Blankenship, author of the 1986 Hacker Manifesto. Recurring themes include penetration testing, incident response, dark web data sales, hacker history and culture, enterprise security operations, and privacy and digital-rights activism. Guests are generally people directly involved in the story being told — hackers, security engineers, or activists — rather than outside commentators. Some stories run across two episodes, with the second part assuming familiarity with the first. Episodes are sponsored by cybersecurity vendors including ThreatLocker, Vanta, Black Hills Information Security, SpyCloud, and Delete.me, with ad reads worked into the show's framing. The show suits listeners with an existing interest in cybersecurity or hacking history rather than a general true-crime audience. Production combines interview audio with host-narrated scene-setting rather than a panel or roundtable format.