Let p = 17, q = 11 and N = pq. If (in the public-key) e= 7, then a possible value for the trap-door d (in the private-key) in an RAS cryptosystem is
(a) 22
(b) 153
(c) 7
(d) 23

Encrypt the message m = 57 with the textbook RSA with the public key pk = N= 253, e = 3
(a) 240
(b) 250
(c) 257
(d) 196

In Asymmetric-Key cipher, the sender uses the _____ key
(a) Private
(b) Public
(c) Either Private or Public
(d) None

Understand PKCSv1.5 scheme(using experimetn) and try to break above scheme.

Why PKCSv1.5 is more Secure