re key sizes have been widely used due to export restrictions.</p>

<p>RC4 consists of a key setup phase and the actual encryption or decryption phase.</p>

<p>RC4_set_key() sets up the <b>RC4_KEY</b> <b>key</b> using the <b>len</b> bytes long key at <b>data</b>.</p>

<p>RC4() encrypts or decrypts the <b>len</b> bytes of data at <b>indata</b> using <b>key</b> and places the result at <b>outdata</b>. Repeated RC4() calls with the same <b>key</b> yield a continuous key stream.</p>

<p>Since RC4 is a stream ci