Memory box
Memory boxes were devices that could hide and store memories deep within the owner's mind, thus making these memories undetectable to any memory scan. (AUDIO: The Memory Box)
When bounty hunter Vienna Salvatori went to assassinate trillionaire Berkley Silver, Silver doubled her bounty offer and used memory boxes to lock away their new deal to ensure that they both believed she had indeed killed him. Silver had copied his memories into another memory box in the mind of Norvelle Spraggott, which unlocked when Vienna and Silver met again on Volcana. Vienna tricked Silver back into his box within Spraggott's mind and erased the opening phrase - her own name - from the name of everyone present during the incident, making his escape impossible. (AUDIO: The Memory Box)
Detective Sargent Lois Mead had locked away her real identity of Roxanna Ceverley inside a memory box. Roxanna's true intentions were to take down Berkley Silver, who had stolen refugees from the Wrath Empire and converted them into revenant slaves. (AUDIO: The Memory Box)