41756329079550_page_140

41756329079550 | page 140 | https://thedailydialectics.com/pdfs/FIOA/41756329079550/41756329079550.pdf

L * —SHeneE- 1, RKC is a Literal hand substitution cypher, designed to give a high degree of security on strategical links where mchine systems are not available, 2. The cypher comprises a book of random literal key-groups, and a book of random 26 x 26 letter substitution squares, one for each day…