Arcane Lock(Player's Handbook v.3.5, p. 200)
Level: Thayan Slaver 1, Sorcerer 2, Magewright 2, Merchant Prince 2, Court Herald 2, Savant 2 (Arcane), Sha'ir 2, Wu Jen 2, Knight of the Weave 2, Wizard 2, Spellthief 2,
Components: V, S, M,
Casting Time: 1 standard action
Target: The door, chest, or portal touched, up to 30 sq. ft./level in size
Saving Throw: None
Spell Resistance: No
An arcane lock spell cast upon a door, chest, or portal magically locks it. You can freely pass your own arcane lock without affecting it; otherwise, a door or object secured with this spell can be opened only by breaking in or with a successful dispel magic or knock spell. Add 10 to the normal DC to break open a door or portal affected by this spell. (A knock spell does not remove an arcane lock; it only suppresses the effect for 10 minutes).
Material Component: Gold dust worth 25 gp.