Item #: SCP-XXXX

Object Class: Safe

Special Containment Procedures: All instances of SCP-XXXX are to be kept in a single Safe-class containment locker with the following modifications:

  • The keycard lock must be programmed to open for any valid Foundation identification card, including D-class, visitor, and sapient anomaly identification cards.
  • In sites which have retrofitted legacy containment lockers, the safe door must be replaced with one that does not have a keyhole.

At least once a week, the current SCP-XXXX project manager is to verify that the entire deck is present and signal a nonviolent containment breach if any part of it is missing.

At least once a week, an automated system shall scan the entire Foundation personnel database for impossible clearances and flag any that are found for immediate review.

Description: SCP-XXXX is a standard American deck of playing cards consisting of 52 normal cards and 2 jokers1. When one or more of these cards is in any room or container, any security measure designed to restrict access to certain people will fail to do so. For example, if one is locked in a room using a standard door lock, the lock will open for any key that can fit into the keyway, or if one is in a room with a guard confirming that people have permission to enter, the guard will allow anyone in after verifying their identity. The anomaly displays some degree of adaptability - testing using an extremely unusual keyway as the access control mechanism has resulted in it accepting any key of similar size, even if it should not have fit the keyway. Measures such as access logs are unaffected.

Once a key has been used to open a lock restricting access to SCP-XXXX, the key retains the ability to open any lock with the same keying, in addition to its original keying. The key will, however, gain the narrowest capability that allows it to work, even in a master keyed system. It is unknown how this is determined. The same happens for bureaucratic controls - the narrowest permission that will allow access is retained unless and until it is revoked. Records change to reflect this. Additionally, it is not necessary that the clearance be logically possible - tests have created such contradictions as D-class personnel with 4/XXXX access but no general clearance level.

Observers of attempted access to SCP-XXXX are subject to a mild cognitohazardous effect rendering them unable to perceive an access as unauthorized. They can describe any person who accesses the objects as reliably as normal, and they will react normally to theft of the cards, but when considering whether someone is allowed to access SCP-XXXX the observer will always conclude that they are.