Appreciate if you can answer COMPLETELY and give me a detailed working with explanation for me to understand. Once completed so long as my doubts are cleared, I will definitely vote up.

Thank you

Question 7 Which statement is true? OAEP makes RSA encryption CCA2 secure, but not CCA1 secure O The Cramer-Shoup encryption scheme is not CCA2 secure. O The security of RSA encryption relies on the difficulty of factorization of large composites. The textbook version of RSA encryption achieves CPA-security