While seeking out for questions for (pre-quantum) public-key cryptography, I find that the questions being asked are variatiful. Askers' confusion can come from anywhere, and lack commonality. Despite this, I believe the main cause is probably novices didn't properly grasp the purpose and meaning of public-key encryption, key exchange, digital signature, and sometimes other minor functionalities of PKC. The few questions that I think has the widest audience are: - https://crypto.stackexchange.com/q/12823/36960 - https://crypto.stackexchange.com/q/586/36960 - https://crypto.stackexchange.com/q/66760/36960 - https://crypto.stackexchange.com/q/5782/36960 - https://crypto.stackexchange.com/q/8687/36960 - *Can we find an archetypal textbook RSA question for here?* - [RSA Full-Domain Hash](https://crypto.stackexchange.com/q/109433/36960) - https://crypto.stackexchange.com/q/3820/36960 - https://crypto.stackexchange.com/q/5646/36960 - [Digital signatures are !!NOT "encrypt" with private keys!!](https://crypto.stackexchange.com/q/93641/36960)