ISO/IEC 18033 specifies encryption systems (ciphers) for the purpose of data confidentiality.
ISO/IEC 18033-3:2010 specifies block ciphers. A block cipher is a symmetric encipherment system with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext.
ISO/IEC 18033-3:2010 specifies following algorithms:
- 64-bit block ciphers: TDEA, MISTY1, CAST-128, HIGHT;
- 128-bit block ciphers: AES, Camellia, SEED.
NOTE The primary purpose of encryption (or encipherment) techniques is to protect the confidentiality of stored or transmitted data. An encryption algorithm is applied to data (often called plaintext or cleartext) to yield encrypted data (or ciphertext); this process is known as encryption. The encryption algorithm needs to be designed so that the ciphertext yields no information about the plaintext except, perhaps, its length. Associated with every encryption algorithm is a corresponding decryption algorithm, which transforms ciphertext back into its original plaintext.
Status: PublishedPublication date: 2010-12
Edition: 2Number of pages: 78
Technical Committee: ISO/IEC JTC 1/SC 27 Information security, cybersecurity and privacy protection
- ICS :
- 35.030 IT Security
Buy this standard
|std 1 187|
|std 2 187||Paper|
ISO/IEC 18033-3:2005/Cor 1:2006Withdrawn
ISO/IEC 18033-3:2005/Cor 2:2007Withdrawn
ISO/IEC 18033-3:2005/Cor 3:2008
A standard is reviewed every 5 years
Stage: 90.93 (Confirmed)
Corrigenda / AmendmentsPublished
ISO/IEC 18033-3:2010/Amd 1:2021
Got a question?
Check out our FAQs
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)
Keep up to date with ISO
Sign up to our newsletter for the latest news, views and product information.