Validity period
A validity period is the time interval during which a credential, authorization, certificate, or stored information is considered current and effective.
Snowflake Data Engineering
A validity interval is the time period during which a stored record version represents the applicable state of an entity.
- How it is used
- Preserves historical entity states during incremental warehouse ingestion and supports point-in-time querying.
- How deep it goes
- Explains SCD2 interval updates and derives append-only end timestamps with LEAD() and NVL().
- Examples
- Uses partner rating changes and product category changes to create successive dated versions.
- What you can do after
- Build it from scratch by appending changed rows and calculating valid-to values in a Snowflake view.
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Software Security for Developers
A certificate validity period is the interval between the times an X.509 certificate becomes valid and ceases to be valid.
- How it is used
- Defines the time window in which an X.509 certificate can be trusted or used.
- How deep it goes
- Explains both timestamps, their boundary behavior, security tradeoffs, practical lifetimes, and OpenSSL inspection, but not implementation internals.
- Examples
- Uses a GitHub certificate, short-lived Sigstore certificates, Let’s Encrypt certificates, and OpenSSL date output.
- What you can do after
- Operate/configure certificate checks by reading validity dates and choosing a reasonable certificate lifetime.
Read how Software Security for Developers explains validity period →
Related concepts
- certificatepart of · A digital certificate is a digitally signed credential that binds an identity to a public key and supports authentication or secure communication.
- timestampmeasured by · A timestamp is a value representing a specific point in time, typically associated with an event, observation, or data item.
- stale dataconfigures · Stale data is information that no longer reflects the current state of its underlying source or relevant conditions.
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