Final answer:
The process to convert received transmitted data into a readable message is demodulation, which is the reverse of modulation. Decoding and encryption are different processes related to data interpretation and security, respectively.
Step-by-step explanation:
The process used to receive transmitted data and convert it into a readable message is known as demodulation. When data is transmitted over a medium, such as a telephone line or radio frequency, it is typically modulated, which means it is combined with a carrier wave to ensure successful transmission over the medium. Once it reaches its destination, demodulation occurs, which is the reverse process where the received modulated signal is converted back to its original form so that it can be understood.
Decoding is a process that is sometimes confused with demodulation, but decoding refers to the interpretation of any code into a user-friendly format, which doesn't necessarily involve signals.
Encryption is the process of converting data or information into code, mainly to prevent unauthorized access. Upon reaching the intended recipient, the information must be decrypted.
Modulation is the process of varying a carrier signal to transmit data, which is the opposite of demodulation.