title: Same RSA keys, same message, different encrypts
body: <p>I generate private/public keys, and a small text file,</p>
  
  <pre><code>openssl genrsa -out priv.pem
  openssl rsa  -out pub.pem -in priv.pem -pubout
  echo "A" &gt; plain.txt
  </code></pre>
  
  <p>When you encrypt the text file with the public key twice, as so,</p>
  
  <pre><code>openssl rsautl -encrypt -pubin -inkey pub.pem -in plain.txt -out cipher.txt
  </code></pre>
  
  <p>you will see that the two cipher.txt differ. This is what I do not understand.</p>