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Trusted QSL is an open-source Amateur Radio software suite developed by the American Radio Relay League to cryptographically sign and exchange QSO logbook records, enabling operators worldwide to replace traditional paper QSL cards with tamper-proof digital equivalents. The package bundles libraries, command-line utilities, and a graphical interface that seamlessly integrate with popular logging applications, letting users batch-sign ADIF or Cabrillo files, upload them to the ARRL Logbook of the World (LoTW) servers, and automatically verify incoming signatures against the LoTW public-key infrastructure. Typical use cases include contesters who need rapid confirmation of thousands of contacts, DXpedition teams seeking swift award credit, and casual operators who want trusted confirmation for Worked-All-States, DXCC, VUCC, or other ARRL awards without postal delays. Released under a permissive licence and currently at version 2.8.1, Trusted QSL has evolved through nine documented versions since its inception, each refining signature algorithms, adding support for revised LoTW security policies, and expanding platform compatibility. The software is categorised under Communications/Ham Radio within software catalogues, and its lightweight codebase also permits integration with third-party analytics or award-tracking dashboards. Trusted QSL is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest version, and supporting batch installation of multiple applications.
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