# ECB confidentiality mode — NIST cryptographic algorithm deprecation schedule: what is approved, deprecated, and disallowed, and when

For ECB confidentiality mode, purpose is encryption; current status is Approved; planned status is retired under SP 800-131A Rev 3 draft; replacement is CBC, CTR, GCM, or other approved modes; source document is SP 800-131A Rev 3 draft, recorded from its source on 2026-08-16.

- **Algorithm:** ECB confidentiality mode _(verified: appears in the quote below)_
- **Purpose:** encryption _(our reading, not quoted from the source)_
- **Current status:** Approved _(our reading, not quoted from the source)_
- **Planned status:** retired under SP 800-131A Rev 3 draft _(our reading, not quoted from the source)_
- **Replacement:** CBC, CTR, GCM, or other approved modes _(our reading, not quoted from the source)_
- **Source document:** SP 800-131A Rev 3 draft _(our reading, not quoted from the source)_

## What the source says

> Rev. 3 proposes moving the minimum classical security strength from 112 bits to 128 bits at the end of 2030, retires ECB confidentiality mode and DSA signature generation, and schedules the retirement of SHA-1 and 224-bit hash functions.

## Source

- https://www.encryptionconsulting.com/education-center/nist-ir-8547-sp-800-131a-algorithm-transitions/

Last verified: 2026-08-16. Review by: 2027-02-12.
Part of [NIST cryptographic algorithm deprecation schedule: what is approved, deprecated, and disallowed, and when](https://referencesource.org/nist-cryptographic-algorithm-deprecation-schedule/).