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Cryptography
SECTION I - CLASS DEFINITION
SUBJECT MATTER UNDER THIS CLASS:
This class includes equipment and processes which (a) conceal
or obscure intelligible information by transforming such information
so as to make the information unintelligible to a casual or unauthorized
recipient, or (b) extract intelligible information from such a concealed
representation, including breaking of unknown codes and messages.
| | (1)
Note. Cryptographic processing may include, e.g., scrambling
or masking or their complementary transformations. |
| | (2)
Note. All electrical communications equipment which processes
an information signal for purposes of concealment are classified in
this class. |
| | (3)
Note. Processing or converting of a signal for purposes of
handling or transmission which may incidentally render a signal unintelligible
are not classified in this class. |
| | (4)
Note. Mere blocking of access to the information is not considered
a cryptographic transformation of the signal or information. |
| | (5)
Note. A cryptogram or a cryptographic record absent a separate
encrypting or decrypting device is classified elsewhere. See References
to Other Classes, below. |
| | (6)
Note. Excluded herein is nominal cryptography in combination
with subject matter of another class. Such subject matter is classified
with the other class. See search notes below. |
| | (7)
Note. Excluded herein is subject matter of this class in combination
with the specific environments of a) business data processing or
b) electrical computer or digital processing system support. Such
subject matter is classified elsewhere in the classes providing
for the specific environment. See search notes below. |
| | (8)
Note. During the latest reclassification project, a group
of existing subclasses were repositioned as is pending additional
reclassification of this class. However, screening was not done
within this group of subclasses or between this group and the other subclasses
not part of the latest project. This should be taken into consideration when
determining an appropriate field of search. |
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