![]() Later, the 128-bit RSA SecurID algorithm was published as part of an open source library. When software implementations of the same algorithm ("software tokens") appeared on the market, public code had been developed by the security community allowing a user to emulate RSA SecurID in software, but only if they have access to a current RSA SecurID code, and the original 64-bit RSA SecurID seed file introduced to the server. ![]() 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)
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