EncryptUpdate.html">EVP_EncryptUpdate(3)</a> and <a href="../man3/EVP_EncryptFinal_ex.html">EVP_EncryptFinal_ex(3)</a> or the equivalently named decrypt functions.</p>

<p>This library implements the Alleged RC4 cipher, which is described for example in <i>Applied Cryptography</i>. It is believed to be compatible with RC4[TM], a proprietary cipher of RSA Security Inc.</p>

<p>RC4 is a stream cipher with variable key length. Typically, 128 bit (16 byte) keys are used for strong encryption, but shorter insecu