1 Scope
This part of ISO/IEC 18033 specifies block ciphers. A block cipher maps blocks of n bits to blocks of n bits, under the control of a key of k bits. A total of eight different block ciphers are defined. They are categorized in Table 1.
Table 1
—
Block ciphers specified
|
Block length
|
Algorithm name (see #)
|
Key length
|
| 64 bits |
TDEA (4.2) |
128 or 192 bits |
| MISTY (4.3) |
128 bits |
| CAST-128 (4.4) |
| HIGHT (4.5) |
| 128 bits |
AES (5.2) |
128, 192 or 256 bits |
| Camellia (5.3) |
| SEED (5.4) |
128 bits |
| SM4 (5.5) |
The algorithms specified in this part of ISO/IEC 18033 have been assigned object identifiers in accordance with ISO/IEC 9834. The list of assigned object identifiers is given in Annex B. Any changes to the specification of the algorithms resulting in a change of functional
behaviour will result in a change of the object identifier assigned to the algorithm.