# ISO 18033-7 Revision Checker

URL: https://iso-18033-7-revision-checker.theartofservice.com
Last updated: 2026-10-20

The free record of ISO/IEC 18033-7:2022 and its Amendment 1, a free scope and date check, a USD 799 revision kit and a USD 49 a month change watch.

Not legal advice; does not certify.

## The rule

ISO/IEC 18033-7:2022/DAmd 1: Information security, Encryption algorithms, Part 7: Tweakable block ciphers, Amendment 1. Stage 40.60 Close of voting, edition 1, 8 pages, under development. The ISO record states no publication date. 15 September 2027 is our estimate from the stage and is labelled estimated. The amendment body is not public and is not stated.

## The base standard

ISO/IEC 18033-7:2022, published April 2022, edition 1, 18 pages. It defines five tweakable block ciphers: Deoxys-TBC-256, Deoxys-TBC-384, Skinny-64/192, Skinny-128/256 and Skinny-128/384. Clause 5 requires a key of at least 128 bits, applies stricter conditions where a use case needs them, limits Skinny-64/192 to a bound below 2^64 data blocks, and forbids reusing keying material across instances with different tweak lengths.

## Prices

Free: the record, the publication page, every clause page and the six-question check, no account.
Revision kit: USD 799 one off, PDF, CSV and XLSX, 46 rows.
Change watch: USD 49 a month.

## Pages

- [1 Scope](https://iso-18033-7-revision-checker.theartofservice.com/clauses/scope/)
- [2 Normative references](https://iso-18033-7-revision-checker.theartofservice.com/clauses/normative-references/)
- [3 Terms and definitions](https://iso-18033-7-revision-checker.theartofservice.com/clauses/terms-and-definitions/)
- [4 Symbols](https://iso-18033-7-revision-checker.theartofservice.com/clauses/symbols/)
- [5 Requirements on the usage of tweakable block ciphers](https://iso-18033-7-revision-checker.theartofservice.com/clauses/requirements-on-usage/)
- [6 Deoxys-TBC](https://iso-18033-7-revision-checker.theartofservice.com/clauses/deoxys-tbc/)
- [6.1 Deoxys-TBC versions](https://iso-18033-7-revision-checker.theartofservice.com/clauses/deoxys-tbc-versions/)
- [6.2 Deoxys-TBC encryption](https://iso-18033-7-revision-checker.theartofservice.com/clauses/deoxys-tbc-encryption/)
- [6.3 Deoxys-TBC decryption](https://iso-18033-7-revision-checker.theartofservice.com/clauses/deoxys-tbc-decryption/)
- [6.4 Deoxys-TBC tweakey schedule](https://iso-18033-7-revision-checker.theartofservice.com/clauses/deoxys-tbc-tweakey-schedule/)
- [7 Skinny](https://iso-18033-7-revision-checker.theartofservice.com/clauses/skinny/)
- [7.1 Skinny versions](https://iso-18033-7-revision-checker.theartofservice.com/clauses/skinny-versions/)
- [7.2 Skinny encryption](https://iso-18033-7-revision-checker.theartofservice.com/clauses/skinny-encryption/)
- [7.3 Skinny decryption](https://iso-18033-7-revision-checker.theartofservice.com/clauses/skinny-decryption/)
- [7.4 Skinny tweakey schedule](https://iso-18033-7-revision-checker.theartofservice.com/clauses/skinny-tweakey-schedule/)
- [A Annex A, Numerical examples](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a/)
- [A.1 Deoxys-TBC-256 example](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a-deoxys-tbc-256/)
- [A.2 Deoxys-TBC-384 example](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a-deoxys-tbc-384/)
- [A.3 Skinny-64/192 example](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a-skinny-64-192/)
- [A.4 Skinny-128/256 example](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a-skinny-128-256/)
- [A.5 Skinny-128/384 example](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-a-skinny-128-384/)
- [B Annex B, Object identifiers](https://iso-18033-7-revision-checker.theartofservice.com/annex/annex-b/)
- [BIB Bibliography](https://iso-18033-7-revision-checker.theartofservice.com/annex/bibliography/)

- [Free check](https://iso-18033-7-revision-checker.theartofservice.com/scope/)
- [Publication record](https://iso-18033-7-revision-checker.theartofservice.com/publication/)
- [Prices](https://iso-18033-7-revision-checker.theartofservice.com/pricing/)
- [Kit](https://iso-18033-7-revision-checker.theartofservice.com/kit/)
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- [Answers](https://iso-18033-7-revision-checker.theartofservice.com/answers/)
- [About](https://iso-18033-7-revision-checker.theartofservice.com/about/)
- [Rules by market](https://iso-18033-7-revision-checker.theartofservice.com/rules/)
- [Method](https://iso-18033-7-revision-checker.theartofservice.com/method/)
- [Sources](https://iso-18033-7-revision-checker.theartofservice.com/sources/)
- [Changelog](https://iso-18033-7-revision-checker.theartofservice.com/changelog/)

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