ClassID:

225126

H04L9/3257 - CPC Classification

Classification description:

arrangements for secret or secure communications Cryptographic mechanisms or cryptographic ; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures using blind signatures

Recent Application in this class:
#1
20250373446
2025-12-04

System to Securely Issue and Count Electronic Ballots

#2
20250350467
2025-11-13

Load Balancing with End-to-End Encryption

#3
20250310077
2025-10-02

CIRCUITRY AND METHODS FOR EFFICIENT SIDE-CHANNEL AND FAULT ATTACK COUNTERMEASURES FOR CRYPTOGRAPHIC EXECUTION CIRCUITRY

#4
20250293891
2025-09-18

SYSTEMS AND METHODS FOR ESTABLISHING DATA PROVENANCE BY GENERATING ONE-TIME SIGNATURES

#5
20250286717
2025-09-11

ANONYMOUS AUTHENTICATION WITH TOKEN REDEMPTION

#6
20250156522
2025-05-15

CERTIFYING CAMERA IMAGES

#7
20250119301
2025-04-10

BLIND SIGNATURE SYSTEM AND METHOD USING LATTICE-BASED CRYPTOGRAPHY

#8
20250119296
2025-04-10

Methods and Apparatuses for Performing Federated Learning

#9
20240422013
2024-12-19

ANONYMOUS EVENT ATTESTATION

#10
20240406153
2024-12-05

Preventing fraud in aggregated network measurements

#11
20240388427
2024-11-21

GENERATING SHARED CRYPTOGRAPHIC KEYS

#12
20240340187
2024-10-10

RECOMMENDATION SERVICE USING BLIND SIGNATURES

#13
20240297796
2024-09-05

ANONYMOUS EVENT ATTESTATION WITH GROUP SIGNATURES

#14
20240214219
2024-06-27

Preventing data manipulation using multiple aggregation servers

#15
20240121109
2024-04-11

DIGITAL SIGNATURES

#16
20240113894
2024-04-04

INFORMATION PROCESSING APPARATUS, PROGRAM EXECUTION SYSTEM, INFORMATION PROCESSING METHOD AND PROGRAM

#17
20240089119
2024-03-14

PREVENTING DATA MANIPULATION AND PROTECTING USER PRIVACY IN TELECOMMUNICATION NETWORK MEASUREMENTS

#18
20240031150
2024-01-25

DATA PROCESSING METHOD AND APPARATUS, COMPUTER DEVICE AND COMPUTER STORAGE MEDIUM

#19
20230421544
2023-12-28

Preventing fraud in aggregated network measurements

#20
20230421353
2023-12-28

Generating sequences of network data while preventing acquisition or manipulation of time data

#21
20230336346
2023-10-19

ELLIPTIC CURVE ISOGENY BASED KEY AGREEMENT PROTOCOL

#22
20230308277
2023-09-28

ANONYMOUS AUTHENTICATION WITH TOKEN REDEMPTION

#23
20230291573
2023-09-14

Apparatus for generating blind signature and method thereof

#24
20230177499
2023-06-08

System and method for detecting signature forgeries

#25
20230163977
2023-05-25

DIGITAL SIGNATURES

#26
20230135566
2023-05-04

Methods and apparatus for cryptographic signature generation

#27
20230094214
2023-03-30

Biometric scanner apparatus and methods for its use

#28
20230068395
2023-03-02

Preventing data manipulation and protecting user privacy in telecommunication network measurements

#29
20230020084
2023-01-19

DIGITAL VALUE TOKEN PROCESSING SYSTEMS AND METHODS HAVING IMPROVED SECURITY AND SCALABILITY

#30
20220417034
2022-12-29

Anonymous event attestation

#31
20220376928
2022-11-24

Preventing data manipulation using multiple aggregation servers

#32
20220353251
2022-11-03

Preventing fraud in aggregated network measurements

#33
20220351199
2022-11-03

SYSTEM AND METHOD FOR DETECTING SIGNATURE FORGERIES

#34
20220294643
2022-09-15

Anonymous event attestation with group signatures

#35
20220263665
2022-08-18

Quantum-level cryptography for delegated digital signatures

#36
20220253538
2022-08-11

METHOD AND SYSTEM FOR DATA SECURITY, VALIDATION, VERIFICATION AND PROVENANCE WITHIN INDEPENDENT COMPUTER SYSTEMS AND DIGITAL NETWORKS

#37
20220239502
2022-07-28

System to Securely Issue and Count Electronic Ballots

#38
20220239464
2022-07-28

Generating sequences of network data while preventing acquisition or manipulation of time data

#39
20220129847
2022-04-28

Privacy-preserving supply chain verification for multiple asset types in shared data storage scenarios

#40
20220078028
2022-03-10

Digital signatures

#41
20220076253
2022-03-10

COMPUTATION MIXING

#42
20220052846
2022-02-17

JOINT BLIND KEY ESCROW

#43
20220029828
2022-01-27

In-vehicle media content monitoring and report generation

#44
20220021530
2022-01-20

Cryptographic key generation using kummer varieties

#45
20210158310
2021-05-27

Blockchain-based transaction processing methods and apparatuses and electronic devices

#46
20210143985
2021-05-13

Method and protocol for triple-blind identity mapping

#47
20210135879
2021-05-06

Decentralized group signature scheme for credential systems with issuer anonymization

#48
20210028946
2021-01-28

Blinding techniques for protection of private keys in message signing based on elliptic curve cryptography

#49
20200295934
2020-09-17

Joint blind key escrow

#50
20200267002
2020-08-20

Blinded endorsement for blockchain

#51
20200167772
2020-05-28

SYSTEM AND METHOD FOR DETECTING SIGNATURE FORGERIES

#52
20200153624
2020-05-14

Biometric scanner apparatus and methods for its use

#53
20200134671
2020-04-30

Method and system for media, advertising and/or in vehicle content monitoring

#54
20200014534
2020-01-09

Elliptic curve isogeny based key agreement protocol

#55
20190380031
2019-12-12

Securing communications for roaming user equipment (UE) using a native blockchain platform

#56
20190379544
2019-12-12

Provisioning network resources in a wireless network using a native blockchain platform

#57
20190303587
2019-10-03

Digital credentials for access to sensitive data

#58
20190229929
2019-07-25

Production of cryptographic signatures

#59
20190222425
2019-07-18

Authenticity verification of messages

#60
20190171825
2019-06-06

Method and system for data security, validation, verification and provenance within independent computer systems and digital networks

#61
20180351754
2018-12-06

System and device including reconfigurable physical unclonable functions and threshold cryptography

#62
20180254908
2018-09-06

Production of cryptographic signatures

#63
20180234409
2018-08-16

Privacy ensured brokered identity federation

#64
20180176024
2018-06-21

Challenge response authentication for self encrypting drives

#65
20180097633
2018-04-05

Signature generation and verification system

#66
20180083786
2018-03-22

METHODS AND SYSTEMS OF PERFORMING TAMPER-EVIDENT LOGGING USING BLOCK LATTICES

#67
20170324545
2017-11-09

Revocable PKI signatures

#68
20170272254
2017-09-21

Production of cryptographic signatures

#69
20170207920
2017-07-20

Production of cryptographic signatures

#70
20160285638
2016-09-29

Challenge response authentication for self encrypting drives

#71
20160269397
2016-09-15

Reissue of cryptographic credentials

#72
20150288525
2015-10-08

Production of cryptographic signatures

#73
20150280923
2015-10-01

Production of cryptographic signatures

#74
20140349682
2014-11-27

Location-based service provider method and system having a user controlled location privacy mechanism

#75
20140245020
2014-08-28

Verification System and Method with Extra Security for Lower-Entropy Input Records

#76
20130318359
2013-11-28

Systems and methods for verifying uniqueness in anonymous authentication

#77
20120297196
2012-11-22

Maintaining privacy for transactions performable by a user device having a security module

#78
20120297185
2012-11-22

Maintaining privacy for transactions performable by a user device having a security module

#79
20120265997
2012-10-18

Privacy-preserving flexible anonymous-pseudonymous access

#80
20120106733
2012-05-03

SYSTEM AND METHOD FOR DATA ENCRYPTION

#81
20120002806
2012-01-05

Digital signatures

#82
20110307704
2011-12-15

Replacing blinded authentication authority

#83
20110191251
2011-08-04

Token based new digital cash protocols with combined blind digital signature and pseudonym authentication

#84
20110185170
2011-07-28

Communication with non-repudiation and blind signatures

#85
20110099113
2011-04-28

Virtual account based new digital cash protocols with combined blind digital signature and pseudonym authentication

#86
20100325441
2010-12-23

Privacy-preserving flexible anonymous-pseudonymous access

#87
20100281257
2010-11-04

Confidential communication method

#88
20100275009
2010-10-28

Method for the unique authentication of a user by service providers

#89
20100174911
2010-07-08

Anonymous authentication system and anonymous authentication method

#90
20100121765
2010-05-13

ELECTRONIC ONLINE VOTING SYSTEM

#91
20090319434
2009-12-24

Maintaining privacy for transactions performable by a user device having a security module

#92
20090217042
2009-08-27

PROVISIONAL SIGNATURE SCHEMES

#93
20090217041
2009-08-27

PROVISIONAL SIGNATURE SCHEMES

#94
20090210349
2009-08-20

VIRTUAL ACCOUNT BASED NEW DIGITAL CASH PROTOCOLS

#95
20090182673
2009-07-16

Token based new digital cash protocols with combined blind digital signature and pseudonym authentication

#96
20090175442
2009-07-09

Digital rights management system protecting consumer privacy

#97
20090049300
2009-02-19

Method and system for user attestation-signatures with attributes

#98
20090031137
2009-01-29

BLIND SIGNATURE METHOD AND ITS SYSTEM

#99
20080243703
2008-10-02

Virtual account based new digital cash protocols with combined blind digital signature and pseudonym authentication

#100
20080154782
2008-06-26

APPARATUS, METHOD AND SYSTEM FOR PROTECTING PERSONAL INFORMATION

#101
20080141035
2008-06-12

Limited Blind Signature System

#102
20080052227
2008-02-28

Anonymous and secure internet payment method and mobile devices

#103
20080005573
2008-01-03

Credentials for blinded intended audiences

#104
20070245138
2007-10-18

Method for user attestation signatures with attributes

#105
20070244833
2007-10-18

Maintaining privacy for transactions performable by a user device having a security module

#106
20070192607
2007-08-16

Electronic voting process using fair blind signatures

#107
20060085359
2006-04-20

Method and apparatus for electronic commerce using digital ticket to provide anonymity

#108
20060056621
2006-03-16

Provisional signature schemes

#109
20060000904
2006-01-05

Method and system for electronic voting over a high-security network

#110
20050278536
2005-12-15

Fair blind signature process

#111
20050137898
2005-06-23

Replacing blinded authentication authority

#112
20050094806
2005-05-05

Use of isogenies for design of cryptosystems

#113
20050066171
2005-03-24

Controlled-content recoverable blinded certificates

#114
20050066164
2005-03-24

Controlled-content recoverable blinded certificates

#115
20050018851
2005-01-27

Methods and apparatuses for providing blind digital signatures using curve-based cryptography

#116
20050005125
2005-01-06

Apparatus and method for generating and verifying ID-based blind signature by using bilinear parings

#117
18602523
2025-02-18

Systems and methods for establishing data provenance by generating one-time signatures

#118
16864732
2021-01-12

Method and apparatus for end-to-end secure sharing of information with multiple recipients without maintaining a key directory

#119
16682809
2020-08-04

Methods and systems for implementing an anonymized attestation chain