Question

Suppose, you and your friends have a few numbers of locks and you all want to share that numbers among yourselves securely using RSA based
   cryptosystem. You are using the private key as (5,27) and your friends are using the public key as (13,27). One of your friends wants to share the
   exact amount of locks only to you. What are the maximal possible locks that your friend can have so that he/she can secretly share that to you?​

Answer 1

Answer:

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