A computer-implemented method, comprising: obtaining, through preset sensing hardware, interaction characteristics of a user interacting with a virtual reality - VR - terminal in response to a request for execution of a target task requiring user identity verification; comparing the obtained interaction characteristics of the user with preset interaction characteristics of an authorized user of the VR terminal to verify identity of the user; and based on a successful user identity verification, executing the target task and authenticating the user as an identity-verified user of the VR terminal; the method further comprising, performing, after the successful user identity verification, an ongoing identity verification, wherein the ongoing identity verification is performed in the background of a VR operating system of the VR terminal, wherein performing the ongoing identity verification comprises a) obtaining, through the preset sensing hardware, additional interaction characteristics of the user interacting with the VR terminal, the additional interaction characteristics comprising behavioral interaction characteristics, b) comparing the obtained additional interaction characteristics of the user with behavioral interaction characteristics of the identity-verified user of the VR terminal to determine whether the user is the identity-verified user of the VR terminal, wherein the behavioral interaction characteristics of the identity-verified user of the VR terminal comprises a characteristic movement of an operating focus of the VR terminal defined by a direction and a speed in which the identity-verified user shifts the operating focus when reading a document, and c) based on a determination that the user is not the identity-verified user of the VR terminal, executing supplemental identity verification for the user. obtaining, through preset sensing hardware, interaction characteristics of a user interacting with a virtual reality - VR - terminal in response to a request for execution of a target task requiring user identity verification; comparing the obtained interaction characteristics of the user with preset interaction characteristics of an authorized user of the VR terminal to verify identity of the user; and based on a successful user identity verification, executing the target task and authenticating the user as an identity-verified user of the VR terminal; the method further comprising, performing, after the successful user identity verification, an ongoing identity verification, wherein the ongoing identity verification is performed in the background of a VR operating system of the VR terminal, wherein performing the ongoing identity verification comprises a) obtaining, through the preset sensing hardware, additional interaction characteristics of the user interacting with the VR terminal, the additional interaction characteristics comprising behavioral interaction characteristics, b) comparing the obtained additional interaction characteristics of the user with behavioral interaction characteristics of the identity-verified user of the VR terminal to determine whether the user is the identity-verified user of the VR terminal, wherein the behavioral interaction characteristics of the identity-verified user of the VR terminal comprises a characteristic movement of an operating focus of the VR terminal defined by a direction and a speed in which the identity-verified user shifts the operating focus when reading a document, and c) based on a determination that the user is not the identity-verified user of the VR terminal, executing supplemental identity verification for the user. a) obtaining, through the preset sensing hardware, additional interaction characteristics of the user interacting with the VR terminal, the additional interaction characteristics comprising behavioral interaction characteristics, b) comparing the obtained additional interaction characteristics of the user with behavioral interaction characteristics of the identity-verified user of the VR terminal to determine whether the user is the identity-verified user of the VR terminal, wherein the behavioral interaction characteristics of the identity-verified user of the VR terminal comprises a characteristic movement of an operating focus of the VR terminal defined by a direction and a speed in which the identity-verified user shifts the operating focus when reading a document, and c) based on a determination that the user is not the identity-verified user of the VR terminal, executing supplemental identity verification for the user.