US Patent 11140154 User authentication using tokens

Aspects of the disclosure relate to token-based authentication mechanism. A user token device may receive a first token from an authentication platform. The user token device may store the first token in a personal token chain corresponding to a user. The user token device may receive a token request, where the token request comprises an indication of a source. The user token device may retrieve, from memory, one or more second tokens that are assigned to the source and transmit the one or more second tokens to the authentication platform. The authentication platform may authenticate the user based on the received one or more second tokens.