Time-delay combination locks

Features of Time-delay Combination Locks
– Armed robbery deterrent
– Equipped with a duress code for activating time delay and sending silent alarm
– Multiple different codes
– Pre-set time lock settings for open and close times
– Pre-set vacation times (e.g. Christmas Day)

Additional Functions of Modern Time-delay Combination Locks
– Dual code facility
– Full audit trail for detailed lock history
– Records who opened the lock, when, and for how long
– Non-volatile memory to prevent data loss when batteries are depleted
– Allows safe to be opened after battery change if correct code is entered

Operation of Electronic Combination Locks with Time-delay Feature
Code needs to be entered twice: once to start the timer
– Second entry required to unlock and open safe after delay period expires
– Enhances security by adding an extra step to the unlocking process
– Provides a controlled delay to deter unauthorized access
– Can be customized to suit specific security requirements

United States Department of Energy: Overview of Locking Systems
– U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research: General use of locks in protection
– Alexis Tsiamis: Tresor Notöffnung (in German)
– Fan Yang, Youmin Chen, Haiyu Mao, Youyou Lu, and Jiwu Shu: ShieldNVM – An Efficient and Fast Recoverable System for Secure Non-Volatile Memory
– ACM Transactions on Storage: Journal article on ShieldNVM (doi:10.1145/3381835)

Categories and Hidden Categories
Password authentication
Access control
– Technology stubs
– Hidden categories: CS1 errors: missing periodical, CS1 German-language sources (de), CS1 maint: multiple names: authors list, All stub articlesSources: https://en.wikipedia.org/wiki/Time-delay_combination_locks