http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2115063-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8f48f41f1eecc9119c9a87a241502343 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L2209-12 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L9-0618 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L9-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G09C1-00 |
| filingDate | 1992-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2001-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c63934261af0f74918341d233c75433 |
| publicationDate | 2001-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2115063-C |
| titleOfInvention | Nonlinear dynamic substitution devices and methods for block substitutions |
| abstract | Method and apparatus for nonlinearizing modulo 2 addition (24) based encryption by block substitution techniques which allows use of the substitution scheme with relatively simple hardware and yet makes cryptanalysis more difficult. The basic block substitution (22), a one to one mapping of n bit binary numbers onto themselves, is based on the fact that certain permutations of the n bit binary numbers define a block substitution by modulo 2 addition (24) of one permuted set of numbers to another, and that a subset of these define equations having an additive relationship when viewed as vectors. This allows the simple changing of the transformation on a frequent basis. Then the equations ace nonlinearized, also in an orderly (34) and readily variable manner, so that the remainder of the set equations may no longer be generated from a limited subset of the equations. Various properties of the transformations and methods of using the same are disclosed. |
| priorityDate | 1991-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.