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

For ECB mode, purpose is encryption; current status is Acceptable; planned status is Disallowed (SP 800-131A Rev 3 draft proposes retirement); replacement is CBC, CTR, GCM, or other approved modes; source document is SP 800-131A Rev 3 draft (via EncryptionConsulting summary), recorded from its source on 2026-08-15.

- **Algorithm:** ECB mode
- **Purpose:** encryption
- **Current status:** Acceptable
- **Planned status:** Disallowed (SP 800-131A Rev 3 draft proposes retirement)
- **Replacement:** CBC, CTR, GCM, or other approved modes
- **Source document:** SP 800-131A Rev 3 draft (via EncryptionConsulting summary)

## 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: 2026-08-15. Review by: 2027-02-11.
Part of [NIST cryptographic algorithm deprecation schedule: what is approved, deprecated, and disallowed, and when](https://referencesource.org/nist-cryptographic-algorithm-deprecation-schedule/).