I'm given a specific number (sayn)to use "as an encryption key," and I have to find the decryption key.

Isnthe same as the encryption exponent?

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- Nov 10th 2013, 10:39 AMeuphonyRSA/cryptography question
I'm given a specific number (say

*n**)*to use "as an encryption key," and I have to find the decryption key.

Is*n*the same as the encryption exponent? - Nov 10th 2013, 10:54 AMSlipEternalRe: RSA/cryptography question
- Nov 10th 2013, 01:37 PMeuphonyRe: RSA/cryptography question
So is the encryption key the same as the public key exponent

? The number I'm supposed to use as an encryption key is even, and it seems like it can't be the public key exponent because phi(m)=(p-1)(q-1) is also even.*e* - Nov 10th 2013, 01:48 PMSlipEternalRe: RSA/cryptography question
It sounds like you are given $\displaystyle m$, not $\displaystyle e$. So, you need to find $\displaystyle \varphi(m)$. Then the decryption key would be $\displaystyle e^{-1} \pmod{\varphi(m)}$? I dunno.

- Nov 10th 2013, 01:53 PMSlipEternalRe: RSA/cryptography question
Oh, just read through the link I sent you. It tells you precisely what to do in the section titled "A working example".

- Nov 10th 2013, 07:42 PMeuphonyRe: RSA/cryptography question
Is there any way to use an even number as an encryption exponent?