Meaning
Sequential data structures ensure that a numerical value only moves upward and never repeats or resets within a transaction log. Security protocols use monotonically increasing counters to prevent replay attacks where an old message is sent again as if it were new. Each record receives a unique and higher number than the one before it.
This mechanism provides a clear order of events that is resistant to manipulation.
Sequence Logic
Database integrity relies on the inability of a process to reuse a previous identifier. In a system using monotonically increasing counters, the current value serves as a reference for all subsequent entries.
Security Function
Cryptographic hardware uses these values to ensure the freshness of a signature or a command. If a packet arrives with a value lower than the stored state of the monotonically increasing counters, the system rejects it immediately. This check protects against the unauthorized repetition of a payment or an access grant.
Compliance Application
Regulatory mandates often require a non-repudiable record of system events. Because monotonically increasing counters create a gap-free sequence, any missing entry indicates a potential data deletion or a system failure. The structure provides an immutable trail for forensic investigation into commercial transactions.
