I'm an engineer with experience in applied cryptography, in particular in Smart Card systems.
Feel free to edit my answers to fix obvious errors, or improve them on expression (I'm not a native English speaker).
56 How big an RSA key is considered secure today? mar 3 '12
26 What security authorities and standards reject $e=3$ in RSA, when, and with what rationale? may 25 '13
21 Impacts of not using RSA exponent of 65537 jul 1 '12
18 Does RSA work for any message M? oct 20 '11