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Let p=3 and q=17 and let an RSA public-key cryptosystem be given. 1. Why is the...

Let p=3 and q=17 and let an RSA public-key cryptosystem be given.


1. Why is the number 8 not a valid encryption-key?

2. We encrypt the number M=8 with the help of the encryption-key e=3.
Why is the encrypted message C=2?

3. Why is the decryption key d for the encryption-key, (e=3), equal to 11?

https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Encryption

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