How Renaissance spies kept secrets: A 1,600-key study reveals encryption's evolution
Researchers analyzed over 1,600 historical cipher keys from early modern Europe to map how secret codes became progressively harder to crack. The findings offer insights into how security practices developed—knowledge that matters for understanding the roots of modern cryptography and information protection standards.
Originaltitel: Keys with nomenclatures in the early modern Europe
<p>We give an overview of the development of European historical cipher keys originating from early Modern times. We describe the nature and the structure of the keys with a special focus on the nomenclatures. We analyze what was encoded and how and take into account chronological and regional differences. The study is based on the analysis of over 1,600 cipher keys, collected from archives and libraries in 10 European countries. We show that historical cipher keys evolved over time and became more secure, shown by the symbol set used for encoding, the code length and the code types presented in the key, the size of the nomenclature, as well as the diversity and complexity of linguistic entities that are chosen to be encoded.</p>