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SP 800-38A Addendum

Recommendation for Block Cipher Modes of Operation: Three Variants of Ciphertext Stealing for CBC Mode

Date Published: October 2010

Planning Note (3/24/2022): NIST has announced its decision proposal to REVISE SP 800-38A (and move this Addendum into the revised SP 800-38A). Public comments may be submitted by April 25, 2022. See the announcement for full details.


Morris Dworkin (NIST)



block cipher; ciphertext stealing; cryptography; encryption; mode of operation
Control Families

System and Communications Protection


SP 800-38A Addendum (DOI)
Local Download

Supplemental Material:
None available

Other Parts of this Publication:
SP 800-38A

Document History:
10/21/10: SP 800-38A Addendum (Final)


Security and Privacy
authentication; cryptography