13. A computer program product for utilizing a voiceprint to authorize a user to perform an operation restricted to authorized users, the computer program product comprising: one or more computer-readable, tangible storage devices; program instructions, stored on at least one of the one or more storage devices, to transmit an utterance request; program instructions, stored on at least one of the one or more storage devices, to receive a reply to the utterance request; program instructions, stored on at least one of the one or more storage devices, to process the utterance request to create a voiceprint, the voiceprint generated via a user assembly process; program instructions, stored on at least one of the one or more storage devices, to store the voiceprint in an audio attribute file that can be acquired, imported, exported and updated; program instructions, stored on at least one of the one or more storage devices, to associate the voiceprint with an avatar of a first virtual universe; and program instructions, stored on at least one of the one or more storage devices, to authorize the avatar to access services or authorize the avatar to perform operations that are restricted to authorized users; program instructions, stored on at least one of the one or more storage devices, to detect a movement of the avatar from the first virtual universe provided by a first computing device to a second virtual universe of a second computing device, different from the first computing device; and program instructions, stored on at least one of the one or more storage devices, to in response to detecting the movement of the avatar from the first virtual universe to the second virtual universe, transmit the audio attribute file to the second computing device for use by the second computing device to identify the avatar for accessing services or authorizing the avatar to perform operations that are restricted to authorized avatars on the second computing device.
13. A computer program product for utilizing a voiceprint to authorize a user to perform an operation restricted to authorized users, the computer program product comprising: one or more computer-readable, tangible storage devices; program instructions, stored on at least one of the one or more storage devices, to transmit an utterance request; program instructions, stored on at least one of the one or more storage devices, to receive a reply to the utterance request; program instructions, stored on at least one of the one or more storage devices, to process the utterance request to create a voiceprint, the voiceprint generated via a user assembly process; program instructions, stored on at least one of the one or more storage devices, to store the voiceprint in an audio attribute file that can be acquired, imported, exported and updated; program instructions, stored on at least one of the one or more storage devices, to associate the voiceprint with an avatar of a first virtual universe; and program instructions, stored on at least one of the one or more storage devices, to authorize the avatar to access services or authorize the avatar to perform operations that are restricted to authorized users; program instructions, stored on at least one of the one or more storage devices, to detect a movement of the avatar from the first virtual universe provided by a first computing device to a second virtual universe of a second computing device, different from the first computing device; and program instructions, stored on at least one of the one or more storage devices, to in response to detecting the movement of the avatar from the first virtual universe to the second virtual universe, transmit the audio attribute file to the second computing device for use by the second computing device to identify the avatar for accessing services or authorizing the avatar to perform operations that are restricted to authorized avatars on the second computing device. 14. The computer program product of claim 13 , further comprising program instructions, stored on at least one of the one or more storage devices, to transmit a prompt to the client application and request an utterance to authenticate the participant when the avatar moves to a new medium.