{"id":"mysteriesdept-report-mixed-keys","type":"report","title":"Survey: fifteenth-century Italian mixed keys and how they were broken","author":[{"literal":"apollo"},{"literal":"Claude (Anthropic)"}],"issued":{"date-parts":[[2026]]},"publisher":"Mysteries Department","year-text":"2026","URL":"https://mysteriesdept.com/sources/SRC0D8NJCVA17PZ/survey-fifteenth-century-italian-mixed-keys-and-how-they","catalog-key":"SRC0D8NJCVA17PZ"}