Graphemic-phonetic diachronic linguistic invariance of the frequency and of the Index of Coincidence as cryptanalytic tools

• Vicente Jara Vera ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: vicente.jara@upm.es

  Affiliation Department of Applied Mathematics to Information Technology and Communications (Telecommunication Engineering), Polytechnical University, Madrid, Spain

  http://orcid.org/0000-0001-8388-5235

  ⨯
• Carmen Sánchez Ávila

  Roles Supervision, Validation

  Affiliation Department of Applied Mathematics to Information Technology and Communications (Telecommunication Engineering), Polytechnical University, Madrid, Spain

  ⨯