g>key</strong> refers to a different mathematical property. For example:</p>
<ul>
  <li> For RSA, the key is the product of two large prime numbers, also called the <strong>modulus</strong>. </li>
  <li> For AES and Elliptic Curve Cryptography (ECC), the key is only a sequence of randomly generated bytes.
    <ul>
      <li> In some cases, AES keys are derived from a master key or a passphrase using a Key Derivation Function (KDF) like PBKDF2 (Password-Based Key
      Derivation Function 2) </li>
    </ul> 