Identity Disk

The Identity Disk is the weapon of choice of Tron. Identity Disks are standard weapons in the computer world, Space Paranoids. When a program's Identity Disk hits another program, the disk will de-resolute, or derezz, them, meaning they will be deleted from the database, pixel by pixel. In the film , Identity Disks are equally as powerful, but some programs have to be downloaded to the disk in order to derezz certain programs.

The Identity Disk is an average weapon, like the Kingdom Key. Just as in the film, a program was installed into Tron's Identity Disk in the I/O Tower to help him neutralize the Heartless and the MCP. After helping Tron save Space Paranoids from the MCP, Sora is rewarded with the Photon Debugger Keychain, which uses an Identity Disk as its token. Sark also wields an Identity Disk of his own. During the first battle, it can be knocked back at him, but in the second, it is too large for this to be possible.

Design
The Identity Disk appears as a grey Frisbee-like weapon. It has a thin ring near the edge of the weapon, followed by three consecutively smaller rings near the center of the disk, which sports a circle. The color of the rings depends on the disk's user: Users and User-affiliated programs wield blue Identity Disks, while Sark wields an orange-red Identity Disk. Otherwise, the disk will be a dark violet.

Tron's Identity Disk is a mixture of dark and light blues. The disk sports a simple color scheme: the outer ring is dark blue while the following ring is light blue, with the pattern repeating towards the center of the disk.

Kingdom Hearts 3D: Dream Drop Distance
Identity Disks make a return in The Grid. These Identity Disks are based on their incarnations from , being smaller, black chakram-like weapons with a white outer edge, the inner edge displaying the same color of the owner's circuitry. Rinzler, Quorra, CLU, and Sam and Kevin Flynn have been shown with Identity Disks, and Sora and Riku also bear Identity Disks on their designs in the Grid.

Kevin Flynn's Identity Disk in particular is said to be the "master key" to the Grid, crucial in leaving it.

Notes and references
Disque codé Identitätsdiskus