Sir, i need some basic information about analog vs digital signal/information transmission. i have few Questions and and idea to discuss weather its feasible or not. [Q1] can digital data requires same bandwidth as analog data contains as if i convert analog information to digital using DAC and transmit? [Q2] can i send same information in digital form on 100MHz carrier using FM (or other modulation types) as i send analog information on same carrier using FM. my idea is to transmit voice[0- 3.4kHz] signal on FM 100MHz carrier but in encrypting form so no one can hear this, by doing this i need to first convert voice to digital using ADC and then play some of my own cryptographic techniques and then send it over air in digital form, make me right if i goes wrong, that if i convert that digital data to analog and send it over air then may be some sort of high frequencies and hormones generated.