tolino shine 2 HD Schutztasche in Lederoptik - Schwarz:
Gente hoy 2. Manual digital USB (incl. Libro del profesor) (B1):
Displayschutz für den SONY Reader Touch Edition (PRS-600):
In this book Real time sound random scrambling encrypted device has been designed and implemented to achieve a secure communications system and to avoid eavesdropping on transmitted sound signals. The secure system involves two stages; sound encrypted at the transmitted part and sound decrypted at the receiver part. Mega Arduino board is used in each of the stages. The encrypted procedure, which is done in transmitter stage, is started by converting the sound signal from analogue to digital form and stored in the buffer memory. The Arduino memory is divided into different, random sections. Then the digital storage sound is converted to analogue signal and transmitted by a communication device. The same procedure is retried in a received stage to remove the randomization sound sections and retrieval of the original sound signals.