BLOCK CHAIN AUTHENTICATION SYSTEMS AND METHODS

Techniques provided herein relate to registering secondary authentication information with a blockchain. A block chain is stored, having primary authentication information, secondary authentication information, or both that is used in authenticating one or more electronic data action requests provided by a client system to a backend system. The client system, a secondary device, or both registers the secondary device with blockchain node, such that secondary device data is stored as the primary authentication information, the secondary authentication information, or both in the blockchain node.