BS ISO/IEC 18033-4:2011+A1:2020 - Page 4

1. a) output functions to combine a keystream with plaintext,
2. b) keystream generators for producing keystream, and
3. c) object identifiers assigned to dedicated keystream generators in accordance with ISO/IEC 9834.

NOTE 1 The list of assigned object identifiers is given in Annex A.

NOTE 2 Any change to the specification of these algorithms resulting in a change of functional behaviour will result in a change of the object identifier assigned to the algorithms concerned.