Patent ID: 11101978

Abstract:
A method (100) for establishing a new identity for a constrained device is disclosed, wherein the device has an existing identity and is associated with an asymmetric key pair comprising a device public key and a device private key. The method comprises applying a hash function to the existing identity (106) and setting the resulting value as the new identity for the constrained device (108), wherein the existing identity comprises at least a first generation hash value of a hash chain formed by applying the hash function to the device public key. Also disclosed is a method (200) for managing an identity of a constrained device, the device being associated with an asymmetric key pair comprising a device public key and a device private key. The method comprises maintaining a record of the device public key (202), receiving an identity from the device (204), sequentially applying a hash function to the device public key to generate a hash chain of the device public key (206), and identifying a hash value in the hash chain matching the identity received from the device (208).