What is a lightweight cryptosystem?
Could you elaborate on the concept of a lightweight cryptosystem? I'm particularly interested in understanding its distinguishing features and potential applications. Is it designed for specific hardware or software constraints? How does it balance security and efficiency? Furthermore, what are the key challenges in implementing lightweight cryptosystems effectively? Lastly, are there any emerging trends or advancements in this field that deserve attention? I'd appreciate a concise yet comprehensive overview of this topic.