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Nowadays, the dataflux shared between IOT systems must be secured from 8-bitsto 64-bits processors systems. Several symmetric cryptographic algorithmalready exist such as AES (Advanced Encryption Standard), RC4, Blowfish, etc.In this work, we propose an 8-bits encryption algorithm, combining severalideas of standard symmetric encryption algorithms. The aim is to provide aefficient, modular and compact algorithm able to tend to truly randomone-time-pad encryption quality even for large data flux. The algorithmcombines the implementation of a divergent polynomial with variablecoefficients for pseudo-random keys generation, variable bit swapping andbitwise operations on data, and the use of one or two passwords. The encryptionhas been evaluated statistically, tested for image encryption and compared withOne-Time-Pad encryption on the same data. Three implementations have beentested respectively in C, Javascript and GNU Octave. Encryption timeperformances are compared with AES on a 8-bits architecture: the Arduino Uno(ATmega328) microcontroller. A new concept of self-decryptionable web encryptedobject, called Blocksnet is also presented and tested as a potentialapplication of the compact and embedded PMSE algorithm.

Pretty Modular Symmetric Encryption (PMSE), compact algorithm for ''embedded cryptography'' with quite low computational cost