by John Mueller
𝙀𝙣𝙘𝙧𝙮𝙥𝙩𝙨 𝘼𝙎𝘾𝙄𝙄 𝙩𝙚𝙭𝙩 𝙬𝙞𝙩𝙝 𝙤𝙣𝙚 𝙤𝙛 1️⃣2️⃣7️⃣ 𝙥𝙧𝙚𝙜𝙚𝙣𝙚𝙧𝙖𝙩𝙚𝙙 𝙩𝙧𝙪𝙚𝙡𝙮 𝙨𝙚𝙘𝙪𝙧𝙚 𝙠𝙚𝙮𝙨.
Key is randomly selected and preshared so that the cipher text cannot be easily decrypted by propability analysis.
the cipher is mapped to the GSM Alphabet to efficiently use all 160 7-bit Charakters per SMS.
let me know if you think 127 keys is not enough and there needs to be 127^2 keys
Next version will cover the transmission of periodic encrypted status reports (GPS, cell info, wifi APs, ...) to a receiver with datalogger.