
The token hardware is designed to be tamper-resistant to deter reverse engineering. On-demand tokens are also available, which provide a tokencode via email or SMS delivery, eliminating the need to provision a token to the user. The seed is different for each token, and is loaded into the corresponding RSA SecurID server (RSA Authentication Manager, formerly ACE/Server ) as the tokens are purchased. a key fob) or software (a soft token)-which is assigned to a computer user and which creates an authentication code at fixed intervals (usually 60 seconds) using a built-in clock and the card's factory-encoded almost random key (known as the "seed").

The RSA SecurID authentication mechanism consists of a " token"-either hardware (e.g. RSA SecurID (new style, SID800 model with smartcard functionality)
