A breaking of (radio communications ciphers) may play a role.Logical formLearned from2 sentences. Ciphers may be broken in a matter of minutes.Logical formLearned from2 sentences. Ciphers can be cardboard.Logical formLearned from2 sentences. A family can be constituted-of-or-filled-with (block ciphers).Logical formLearned from2 sentences. (Enigma ciphers) may pertain-to a country.Logical formLearned from2 sentences. (Product ciphers) can be a kind of ciphers.Logical formLearned from2 sentences. Cryptanalysis can be constituted-of-or-filled-with ciphers.Logical formLearned from2 sentences. A list of ciphers may include some substitution.Logical formLearned from2 sentences. Some ciphers may have requirements.Logical formLearned from2 sentences. Ciphers can be general-purpose.Logical formLearned from2 sentences. (Radio communications ciphers) may pertain-to a military-or-other-action-organization.Logical formLearned from2 sentences. A structure of ciphers may be explored by cryptographers.Logical formLearned from2 sentences. A structure may be used in construction of (block ciphers).Logical formLearned from2 sentences. Some (block ciphers) may use forms of transposition.Logical formLearned from2 sentences. A use can be in (block ciphers).Logical formLearned from2 sentences.