Abstract: Systems and methods include receiving from a keyless account service, in response to an authentication request, a keyless account service signature including a cryptographic signature over a user identifier, a managing application identifier of a managing application, a nonce and to-be-revealed data, where the managing application manages activities by the user on a blockchain, and where the nonce is populated with a public key associated with the authentication request. An activity signature is generated for a particular activity based on the keyless account service signature and at least one to-be-revealed data field associated with the to-be-revealed data of the authentication request.