What are some possible forms for the output gesture?

1. Jack (Badler XX) (proprietary)
2. VRML a.k.a Web3D (VRML 1997) (open standard)
3. The open standards of the VRML Humanoid Animation Working Group (Roehl 1998)

What are the priorities for the output?

1. Works with cheap, readily available hardware and operating systems.
2. Realism is not a high priority; in fact, a more realistic signer would be expected to distract from the message being signed (McCloud 1994).