Secure Send » Mathematics http://ssend.com SSend.com Fri, 03 Feb 2012 06:24:41 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 RSA cryptography question? http://ssend.com/blog/rsa-cryptography-question/ http://ssend.com/blog/rsa-cryptography-question/#comments Sun, 17 Oct 2010 12:22:54 +0000 admin http://ssend.com/blog/rsa-cryptography-question/ send securely
geoff asked:

Alice wants to send a message to Bob securely, using
the RSA cryptosystem. Explain how this works (you do
not have to justify related theorems), by considering an
example where the public key is (n, e) = (77, 5). More
specically, and the private key, and explain the decryption/encryption process for each message 1 <= P <= 77.
Is there a restriction on the message P that Alice can
send? (P, 77) = 1.

]]> http://ssend.com/blog/rsa-cryptography-question/feed/ 1 Challenging Question? http://ssend.com/blog/challenging-question/ http://ssend.com/blog/challenging-question/#comments Sat, 01 Aug 2009 03:02:48 +0000 admin http://ssend.com/blog/challenging-question/ send securely
sheriefhalawa asked:

Me and my friend have reserved rooms in hotels. I want to handle him golden statue. Both me and him have 1 suit case, 1 lock and 1 key each (each one’s key is for his own lock). We are not allowed to leave our rooms but we are allowed to send each other things via the room handlers, which are not trust-worthy. If they see a golden statue, they steal it. If they see a key, they make themselves identical copies of it. Is there someway using some sequence of transactions that I can transfer the statue securely to my friend? (A golden statue for the best answer :)

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