Citrix Systems, Inc.

John Gavin Ashman

Ricardo Fernando Feijoo

Feng Huang

Tom Kludy

Methods and systems for secure authentication of users based on unique device identifiers are described herein. A computing device may receive, from a user device, a device registration. The device registration may comprise authentication credentials, device information, and/or a public key. Based on the authentication credentials and/or the device information, a unique device identifier may be generated. A token may be generated based on the unique device identifier and sent to the user device. A request for content may be received from the user device. A nonce may be sent to the user device. The token and a signed version of the nonce may be received from the user device. The nonce may have been signed using a private key corresponding to the public key. Access to the content may be provided based on the token, the unique device identifier, and/or the signed version of the nonce.

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Wareham, United Kingdom

John Gavin Ashman