|This article belongs to the Classic Continuity|
The Ultimatrix Security Keys are two special keys used to give access to otherwise locked DNA of certain aliens in the Ultimatrix. In order to prevent himself, and by extension, Albedo, from becoming certain transformations like Alien X, Ben had their DNA locked and the keys created to return access to him in case of an emergency. Ben gave the keys to Gwen and Kevin.
The keys are shaped like padlocks with keychains surrounding them. They both bear the symbol of the Ultimatrix.
Sometime after The Final Battle: Part 2, Ben requested Kevin to install a security system into the Ultimatrix to prevent an accidental transformation like Alien X or prevent Albedo from accessing Alien X if he were to ever gain possession of the device again.
In The Forge of Creation, Ben requested that Gwen and Kevin give him the keys to unlock Alien X. After inserting the keys, Alien X (referred to as Transformation Ten by the Omnitrix's A.I.) was re-unlocked and Ben transformed, though ended up failing to convince Bellicus and Serena to reveal the location of the Forge of Creation.
The keys need be placed in slots on the side of the Ultimatrix's dial, and then turned, thus overriding the Ultimatrix Security System and unlocking the blocked alien DNA.
It is used to prevent Albedo from activating it and Ben from transforming into Alien X by accident, thus preventing the former from accessing Alien X's abilities and the latter from being trapped in Alien X.
- Both keys were held by Gwen and Kevin at all times in case of emergency.