# RSA Cryptosytsem, choosing $e$ [duplicate]

I am using the RSA crytposytem. I have $p$, $q$ and hence $n$ and $\phi$ however I don't understand how to get $e$ such that $gcd(e,\phi)=1$

Many thanks

• That's covered here. – fgrieu Nov 30 '14 at 19:31
• @fgrieu Should we hit the close button? – Maarten Bodewes Dec 1 '14 at 11:52