
International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
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International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
Tapan Parekh
Data Engineer at Amazon, New York, NY, USA
Abstract - The importance of data privacy in modern data management practices has risen because new regulationslikeGeneralDataProtectionRegulation(GDPR), Health Insurance Portability and Accountability Act (HIPAA) and California Consumer Privacy Act (CCPA) demand more stringent protections. Organizations dealing with sensitive data must create data models that stay true to privacy principles while also ensuring scalable and efficient operations. The study presents a data model centered on privacy which integrates data minimization principles along with access control features, encryption protocols and data life-cycle management strategies. The model achieves operational efficiency as it accommodates compliance measures and security protocols while ensuring transparentuserinteractions.
Key Words: Data Privacy, Regulatory Compliance, GDPR, CCPA, HIPAA, Consent Management, Data Governance, Access Control, Data Classification and Minimization, Encryption, Anonymization, Pseudonymization, Data LifecycleManagement.
1.INTRODUCTION
Theresponsibilitytoprotectdataprivacyhasevolvedinto bothalegalrequirementandethicaldutyasorganizations accumulate more personal information. Businesses need to put privacy protection at the forefront of their data practices due to the regulations such as General Data Protection Regulation (GDPR), Health Insurance Portability and Accountability Act (HIPAA) and California Consumer Privacy Act (CCPA) with the increasing demands of consumers. Data models designed for basic storage and retrieval functions often do not include privacy safeguards which makes sensitive information at risk.
Modern data models need to integrate privacy controls duringtheir initial developmentphaseto meet regulatory standardswhileboostingsecurityandsupportingefficient data governance. Organizations that implement data minimization techniques together with role-based access controls and encryption methods achieve superior protection of personal information while sustaining trust andtransparency.
Organizations which do not establish strong data privacy protocols will encounter serious consequences.
Organizations who do not comply with data protection regulations will unavoidably encounter major consequencessuchas:
Organizations that do not adhere to data protection regulations like GDPR, CCPA, and HIPAA face substantial penalties from regulatory agencies. Under GDPR regulationsorganizationscanbefinedupto€20millionor 4% of their global annual revenue. The CCPA establishes penalties for violations which range between $2,500 and $7,500 per transgression. The HIPAA regulation enforces finesreaching$1.5millionannuallyfororganizationsthat fail to comply in each distinct non-compliance category. Organizations must deal with expensive legal settlements and higher insurance premiums as well as extra costs for meetingcompliancerequirements.
Customer trust declines when organizations mishandle personal information which results in diminished user interaction and financial setbacks for the business. Customers today possess greater awareness regarding their privacy rights which leads them to choose competitors who demonstrate better data protection practices when they find their trust compromised. Longtermcustomer relationshipsandbrandloyaltydepend on continuoustrustmaintenance.
Businesses runtherisk offacinglegal actionsfromcourts andregulatorybodiesiftheyfailtomanagesensitivedata appropriately. Affected individuals who file class-action lawsuits together with regulatory investigations produce extended legal conflicts which consume financial and operational resources. Mandatory audits and increased regulatory scrutiny will occur as a consequence of compliancefailureswhichmakebusinessoperationsmore complex.
The process of correcting compliance failures after they occur typically involves expensive system modifications along with updates to existing processes and expanding personnel resources. When investigating data breaches incident response teams must work to contain damages

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
and implement corrective measures that take resources away from fundamental business operations. Business operations might face disruptions when systems require goingofflineforresolvingnon-complianceissues.
Public perception and negative media reports about insufficient data security can damage brand reputation and decrease market competitiveness. Restoring a tarnished reputation requires both time and financial investmentwhilesomecustomerswilldecidenot tocome back. Organizations that actively demonstrate their dedication to protecting data privacy will see improvementsintheirbrandreputationaswellasgaining a competitive advantage while appealing to consumers whovalueprivacy.
Organizations which build data models that fulfill regulatory requirements will reduce risks while boosting security and user trust to achieve sustainable growth and lastingsuccess.
A strong privacy data model needs to tackle several important compliance and security considerations as below:
3.1 Data Classification:
The procedure of data classification involves sorting data according to its level of sensitivity. Appropriate security measuresareappliedtovarious datatypeswhichreduces unauthorized access while maintaining regulatory compliance. Organizations achieve better data management efficiency through proper classification which helps them focus their protection efforts on sensitiveinformation.
3.1.1 Personal Data (PII - Personally Identifiable Information): Includes names, emails, phone numbers, and addresses. The protection of this data serves to block identitytheftwhilemaintainingindividualprivacy.
3.1.2 Sensitive Data: The category of Sensitive Data encompasses financial statements combined with medical details and government identification numbers like Social SecurityNumbers.Toprotectthisdataorganizationsmust implementstrictcontrolsandemploybothencryptionand limitedaccessmeasures.
3.1.3 Non-Sensitive Data: Publicly available data such as product catalogs and general statistical information is included. Its importance may be lower but maintaining accuracyandintegrityremainsessential.
Data minimization means organizations collect and keep only essential data needed to fulfill a specific purpose. Data breach risks decrease while organizational liability reduces when data exposure is minimized. Privacy laws such as GDPR and CCPA mandate purpose limitation, which is supported by the practice of minimizing data collection. Organizations that reduce data storage volume benefit from reduced storage expenses while simplifying complianceandbuildingcustomertrustthroughenhanced privacy protection. Data minimization can be achieve usingthefollowingtechnique.
3.2.1 Anonymization: When data contains no personally identifiable elements it protects individual identitiesfromunauthorizedre-identification.
Table -1: BeforeAnonymization
Patient ID Patient Name DOB Diagnosis
1001 JohnSmith 1978–10-11 Diabetes 1002 PeterSmith 1984-01-28 Hypertension
Table – 2: AfterAnonymization
Patient ID Age Group Diagnosis
A001 46-50years Diabetes
A002 41-45years Hypertension
3.2.2 Pseudonymization: The use of artificial identifiersinplaceofprivateinformationprotectsagainst unauthorized exposure yet allows data analysis and processingtocontinue.
Table -3: BeforePseudonymization Order ID Name Credit Card# Order Amt ORD-12345 JohnSmith 4113-XXXX-XXXX-2122 65.80
ORD-4567 PeterSmith 4783-XXXX-XXXX-9845 23.50
Table – 4: AfterPseudonymization
Order ID Pseudo ID Credit Card# Order Amt
ORD-12345 CUST-7865 4113-XXXX-XXXX-2122 65.80
ORD-4567 CUST-9954 4783-XXXX-XXXX-9845 23.50

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
3.2.3 Data Aggregation: Where possible storing aggregated data at a high level minimizes data sensitivity whilekeepingitsvalueforanalysisintact.
3.3 Access Control:
Access control systems allow only authorized employees to reach sensitive information which helps to stop unauthorizedaccesswhilekeepingoperationsefficient.
3.3.1 Role-Based Access Control (RBAC): System administratorsallocatestandardizedroles(suchasAdmin, Manager,Analyst)withuniquepermissionstouserswhich makesaccessmanagementmorestraightforward.
3.3.2 Attribute-Based Access Control (ABAC): User attributes such as job title, location, or security clearance determine access permissions which provide flexible and detailedaccesscontrol.
Effective access control models enable legitimate users to efficiently access necessary data while blocking unauthorizedaccessattempts.
3.4 Encryption and Masking:
Encryption and masking convert data at rest and during transmission into unreadable formats for unauthorized users. These methods protect data from unauthorized access by keeping it secure whenever it is intercepted or improperlyaccessed.
3.4.1 Encryption at Rest: AES-256 encryption safeguardsstoreddataagainstunauthorizedaccess.
3.4.2 Encryption in Transit: TLS 1.3 encrypts data transmission between systems to prevent data interceptionduringtransit.
3.4.3 Static Masking: Staticmaskingemploysirreversible data transformations during storage which makes the information unreadable to anyone without the proper keys.
3.4.4 Dynamic Masking: Dynamic masking displays only selected data segments like the last four digits of a credit card according to user permissions while safeguardingsensitiveinformation.
3.5 Auditability and Compliance:
Organizations must keep comprehensive records of data access and any changes to meet regulatory compliance standards. Tamper-proof logs create accountability while makingregulatoryauditsmorestraightforward.
3.5.1 Access Logs: Maintain a detailed audit trail by logging user activities that record who accessed or modifieddataalongwiththecorrespondingtimestamps.
3.5.2 Change History: Document modifications in essential database fields to maintain data accuracy and ensuretransparentoperations.
3.5.3 Automated Reporting: Automated reporting tools produce compliance reports required for internal assessments and external audit processes to streamline regulatorycompliance.
3.5.4 Tamper-Proof Logging: Preserve audit record integritybypreventinglogalterationsthroughblockchain orwrite-once-read-many(WORM)storagesolutions.
Organizationsmusthandledatathroughoutitslifecyclefor regulatory compliance and security reasons starting with datacollectionandendingwithitsdeletion.Organizations benefit from reduced storage expenses and strengthened security while complying with regulations through efficient data lifecycle management practices. Key elementsinclude:
3.6.1 Data Retention Policies: Establishing data storage duration to comply with both legal standards and businessneeds.
3.6.2 Archival Strategies: Organizations transfer essentialhistoricaldatatoalternativestoragesolutionsto lessenthemaindatabaseworkload.
3.6.3 Automated Deletion: Organizations must establish routines for deleting data that has become expired or obsolete to meet "Right to be Forgotten" legal obligations.
3.6.4 Legal Holds: Safeguard data against deletion to fulfilllegalorregulatorycompliancemandates.
Through proper auditing and lifecycle management organizations can ensure accountability while identifying unauthorized activities and proving compliance with GDPR,CCPAandHIPAA.
4.
Eachspecificregulationneedsuniquedatamodelstomeet compliancestandards.
4.1. GDPR:
The General Data Protection Regulation functions as an extensive privacy protection legislation safeguarding personal information of EU residents. The regulation sets firmrulesgoverningtheacquisition,management,storage, anddeletionofdata.

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Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
Data Minimization: Organizations should gather the essential data necessary for specific purposes and store it onlyforthedurationrequired.
User Consent Management: Users need to receive information about data collection procedures and give explicit consent before organizations can process their information. Users must retain the power to revoke their consentwhenevertheydecide.
Right to Erasure (Right to be Forgotten): Users can demand their personal data be erased when it no longer servesitsoriginalpurpose.
Data Portability: Users should receive their personal data in a standard format that allows them to transfer it to anotherserviceproviderwithoutrestrictions.
Accountability and Compliance: Organizations have to establish both technical and organizational safeguards to align with GDPR requirements while keeping records of theirdataprocessingoperations.
A robust, GDPR-compliant data model meets GDPR standards by protecting data and providing transparency and user control through carefully planned database structures. A User Table collects personal data with consent records and pseudonymized identifiers to maintain privacy standards while a Personal Data Table securely stores encrypted user information with specified retention periods. Comprehensive audit trails from Data Access Logs track every personal data interaction to help organizations maintain compliance. Automated retention rules strengthen the system by erasing outdated data consistent with the regulations. Pseudonymization paired with encryption and Data Subject Request tracking performs secure handling of sensitive data while protectinguserrightswithprecision.
Table - 5 : ListoftablesforGDPRCompliancedatamodel
Table Name - User
Column Name Description
user_id Uniqueidentifierfortheuser
name User'sfullname
email User'semailaddress
consent_status Indicatesiftheuserhasgivenconsent (Yes/No)
pseudonymized_id Apseudonymizedidentifierforprivacy protection
created_at Timestampwhentheuserwascreated
Table Name - Personal_Data
Column Name Description
data_id Uniqueidentifierforpersonaldata record
user_id ForeignkeyreferencingtheUserTable
data_type Typeofpersonaldata(e.g.,Address, DOB)
data_value_encrypted Encryptedstorageofpersonaldata retentionperiod Definedretentionperiodforthedata
deletionstatus Statusindicatingifthedatais scheduledfordeletion
Table Name - Data_Access_Logs
Column Name Description
log_id
Uniqueidentifierforthelogentry
user_id ForeignkeyreferencingtheUserTable
accessed_by Identifieroftheentityaccessingthedata
access_time Timestampofwhenthedatawas accessed action
Descriptionoftheaccessaction(e.g., Read,Update,Delete)
The CCPA stands as a California state law which strengthens privacy rights and consumer protections for Californian residents. The regulation provides consumers enhanced authority over the collection, storage and sharingprocessesoftheirpersonalinformation.
Right to Know: Consumers have entitlement to request businesses disclose both the types and specific details of theircollectedpersonaldata.
RighttoDelete:Businessesmusteraseconsumerpersonal information when requested but may retain data under specifiedlegalorcontractualconditions.
RighttoOpt-Out:Consumersmaintaintherighttoprevent thesaleoftheirpersonalinformationtothirdparties.

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
Non-Discrimination: Companies must not refuse to provide goods or services, impose different pricing nor deliver varying service levels based on how consumers choosetomanagetheirprivacy.
TheidealapproachtocreateaCCPA-compliantdatamodel requires tracking user consent while managing access requestsandopt-outpreferences.Thissystemmaintainsa User Table for personal information and opt-out preferences while using a Consent Requests Table to register access and deletion requests.An Audit Log Table strengthens compliance efforts through detailed tracking of data modifications and access events.Explicit opt-out tracking combined with deletion request handling and Data Disclosure Logs enables transparency regarding third-partydatatransfers.Thesestructuresworktogether to provide responsible data management while giving usersmorecontrolovertheirpersonalinformation.
Table - 6: ListofTablesforCCPACompliancedatamodel
Table Name - User
Column Name Description
user_id Uniqueidentifierfortheuser
name User'sfullname
phone_number
opt_out_status
created_at
User'semailaddress
User'scontactnumber
Indicatesiftheuserhasoptedoutof datasale(Yes/No)
Timestampwhentheuserrecordwas created
Table Name - Consent_Requests
Column Name Description
request_id
Uniqueidentifierfortherequest
user_id ForeignkeyreferencingtheUsertable
request_type
request_status
requested_at
processed_at
Typeofrequest(Access,Deletion, Correction)
Statusoftherequest(Pending, Approved,Denied)
Timestampofwhentherequestwas made
Timestampofwhentherequestwas completed
Table Name - Audit_Log
Column Name Description
log_id
user_id
Uniqueidentifierfortheauditentry
ForeignkeyreferencingtheUsertable(if applicable)
modified_by Identifieroftheentity modifying/accessingdata
modification_type
Descriptionofthemodification(Create, Read,Update,Delete)
modification_time Timestampoftheaction
notes
Additionaldetailsaboutthemodification
Table Name - Data_Disclosure_Logs
Column Name Description
disclosure_id
user_id
third_party
data_shared
sharing_purpose
disclosure_date
user_notified
Uniqueidentifierforthedatadisclosure entry
ForeignkeyreferencingtheUsertable
Nameofthethirdpartyreceivingthe data
Descriptionofthedatashared
Reasonfordatadisclosure
Timestampofwhenthedatawasshared
Indicatesiftheuserwasnotified (Yes/No)
Accountability Act):
The Health Insurance Portability and Accountability Act (HIPAA)servesasafederalprivacyandsecuritylawinthe U.S. dedicated to protecting medical data. The law affects healthcare providers and insurance companies as well as business associates when they handle protected health information(PHI).
4.3.1 Key Requirements:
Protection of Health Data: Organizations need to protect PHI by maintaining its confidentiality, integrity and availability.
Audit Logging: The system must track and supervise all accessesandchangesmadetohealthdatarecords.

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
Access Controls: Organizations should strictly enforce role-based access control (RBAC) systems to control who haspermissiontoviewandmodifyPHI.
Encryption: PHI should be protected with encryption while stored and during transmission to block unauthorizedaccess.
Data Integrity and Availability: Security protocols should protect data from unauthorized modifications while maintainingitsavailabilitywhenrequired.
The HIPAA-compliant data model uses strong encryption alongside access control and logging systems to secure patient health information. This system maintains a Patient Table storing encrypted records while its Access Logs Table documents all data interactions to create completeaudittrails.TheRole-BasedAccessControlTable establishes permissions which restrict access exclusively to authorized users. The system provides extra functionalities with complete end-to-end encryption alongside automated audit logging and research-focused data anonymization. Backup and disaster recovery proceduresprovideuninterrupteddataaccessibilitywhile maintainingregulatorycompliance.
Table – 7:ListofTablesforHIPAAComplianceData Model
Table Name - Patient
Column Name Description
patient_id Uniqueidentifierforthepatient
name_encrypted Patient'sencryptedfullname
dob_encrypted Encrypteddateofbirth
contact_encrypted Encryptedcontactdetails
medical_record_encr ypted Encryptedmedicalhistoryandrecords
created_at Timestampwhentherecordwascreated last_updated_at Timestampofthelastrecordupdate
Table Name - Access_Logs
Column Name Description
log_id
Uniqueidentifierforthelogentry
patient_id ForeignkeyreferencingthePatienttable
accessed_by UserIDofthepersonaccessingtherecord
role
Roleofthepersonaccessing(Doctor, Nurse,Admin)
access_time
action
reason
Timestampofdataaccess
Typeofaction(Read,Update,Delete)
Justificationforaccess(Treatment,Billing, Audit)
Table Name - Role_Based_Access_Control
Column Name Description
role_id
role_name
Uniqueidentifierfortherole
Nameoftherole(Doctor,Nurse,Admin, Researcher)
permissions Allowedactions(View,Edit,Delete)
assigned_users ListofuserIDsassignedtothisrole
Table Name - Anonymized_Research_Data
Column Name Description
research_id
anonymized_data
Uniqueidentifierforresearchentry
De-identifiedpatientdataforresearch data_type
Typeofdataused(Genetic,Treatment, Diagnosis)
shared_with Authorizedresearchentityname
sharing_date
retention_period
Datewhenthedatawasshared
Dataretentionpolicyduration
Table Name - Backup_Recovery
Column Name Description
backup_id Uniqueidentifierforthebackupinstance patient_id ForeignkeyreferencingthePatienttable backup_timestamp Timewhenthebackupwascreated
recovery_status
encrypted_backup_lo cation
Statusofdatarecovery(Pending, Successful,Failed)
Encryptedstoragelocationofthebackup
The unified privacy compliance model combines the requirements from GDPR, CCPA, and HIPAA into one flexible framework. The methodology enables organizations that process personal and sensitive data in different jurisdictions to stay compliant with diverse

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
regulations while avoiding fragmented or redundant data managementsystems.
Comprehensive Consent Management: The system monitors user consent through mechanisms that comply withregionallawsincludingexplicitconsentrequirements forGDPRandopt-outfeaturesforCCPA.
Data Classification and Protection: This system identifies personal and sensitive health information and protects it following the most stringent data protection standards available.
Role-Based and Attribute-Based Access Control:Access control mechanisms are designed to align with universal privacy laws along with specific healthcare industry regulations.
Encryption and Anonymization: The system protects sensitivedatabyimplementingfullencryptionthroughout its journey and incorporates anonymization or pseudonymizationwhennecessary.
Retention and Deletion Policies: Automates data management through its lifecycle by adhering to regional laws such as GDPR's deletion rights and CCPA's removal rights.
Audit Logging and Compliance Reporting: The system records comprehensive access and modification logs which enable audit processes to meet various regulatory standards.
A comprehensive privacy management solution should integrate consent tracking, access control measures, encryptionprotocolsandretentionschedulestoconstruct a suitable data model. User consent details and preferencestooptoutarestoredintheUserTableandthe Personal Data Table maintains jurisdictional information together with encryption standards and data retention policies.TheDataAccessLogsTabledocumentseverydata interaction to maintain full accountability. The Consent RequestsTablemaintainsrecordsofuserrequestsfordata access modification or deletion. These combined components establish strong compliance with multiple regulatorystandards.
Table – 8 : ListoftablesforUnifiedPrivacyCompliance
Table Name Description
UserTable Storesbasicuserdetailsandjurisdictional information
Federated_Consent Table Tracksconsentacrossvarious jurisdictions
Regulatory_Complian ce Tracksspecificregulatoryrequirements
Data_Access_Logs Maintainsanaudittrailforalldata interactions
Automated_Complia nce_Reports Generatesreal-timecompliancereports
Multi_Level_Encrypti on Managesencryptionmethodsbasedon dataclassification
The unified compliance model adjusts to existing jurisdictional regulations and uses multi-level encryption depending on how data is classified. A centralized dashboardmanagesfederatedconsentwhichallowsusers to adjust their privacy settings across various regions. Real-time audit reports created through automated compliance reporting eliminate the need for manual processes. Structured fields exist within the Regulatory Compliance and Federated Consent tables to document regulatory requirements alongside consent information. The platform simplifies intricate privacy laws to boost bothoperationalproductivityandprotectionofdata.
Organizations face multiple challenges when developing privacy-centricdatamodelswhichtheymustovercometo maintain compliance standards as well as achieve system performanceandsecurityobjectives.Wewilldiscussboth theprimarychallengesandtheircorrespondingmitigation strategiesbelow:
Whensystemsimplementencryption,anonymization,and access controls they face increased latency which affects systemperformance.
Mitigation: Enhance system performance through strategic database indexing combined with encryption accelerationviaspecializedhardware.Decreaselatencyby establishing efficient database queries and caching mechanisms.
Multiple regulations like GDPR, CCPA, and HIPAA create diverserequirementsthatmayconflictwhenimplemented acrossdifferentregions.
Mitigation: Implement a modular framework that enables compliance policies to be adjusted according to different jurisdictional requirements. Utilize compliance managementsystemstomaintaincurrentadherencetoall regulatoryrequirements.

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume: 12 Issue: 03 | Mar 2025 www.irjet.net p-ISSN:2395-0072
Users demand authority over their personal data which includes the capabilities to view, alter, and remove their informationaccordingtoprivacyregulations.
Mitigation: Establish self-service privacy dashboards that enable users to examine their data and make changes or deletions as needed. Ensure users understand privacy policieswhileofferingthemtoolstomanagetheirconsent preferences.
Privacy protection measures must effectively expand alongside increasing data volumes to sustain both operationalperformanceandlegalcompliance.
Mitigation: Implement distributed databases with sharding to spread data throughout nodes while keeping privacy controls in place. Develop privacy protection structures like differential privacy to secure extensive datasets.
Databreachesandunauthorizedaccesstosystemsleadto significant financial losses and damage to organizational reputation.
Mitigation: Enhance protection mechanisms by adopting multi-factorauthentication(MFA),intrusiondetectionand prevention systems (IDPS), and zero-trust security frameworks. Keep security protocols updated while performingregularvulnerabilityassessments.
Organizations that actively confront these challenges will develop powerful data models that strike a balance between privacy requirements and performance needs while scaling effectively to maintain compliance and secureuserconfidence.
A data model focused on privacy protection requires foundational principles of security measures, compliance standards, and user control mechanisms. Organizations can protect sensitive information while keeping it usable throughstructureddataclassificationtogetherwithstrong access controls, advanced encryption methods and automated management of data lifecycles. The next steps inprivacyframeworkdevelopmentcouldincludeartificial intelligence for compliance monitoring alongside instant privacy evaluations and distributed identity management systems to maintain alignment with both technological progressandregulatoryupdates.
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