What Is Confidentiality?
Confidentiality is the principle that sensitive information should only be accessed, used, or disclosed by authorized people, systems, and organizations.
It is one of the three foundational principles of information security, commonly known as the CIA triad:
- Confidentiality protects information from unauthorized access or disclosure.
- Integrity protects information from unauthorized or improper changes.
- Availability ensures that information and systems are accessible when needed.
Organizations maintain confidentiality by identifying sensitive information, restricting access, protecting data during storage and transmission, and monitoring how information is used and shared.
What Types of Information Require Confidentiality?
The information an organization must protect depends on its business, customers, legal obligations, and compliance frameworks.
Common examples include:
- Customer information
- Employee records
- Financial information
- Authentication credentials
- Health information
- Payment card data
- Intellectual property
- Legal documents
- Security configurations
- Audit evidence
- Source code
- Business strategies
- Information received under a confidentiality agreement
Not every piece of information requires the same level of protection. Organizations commonly use data classification policies to determine how information should be accessed, stored, transmitted, retained, and deleted.
How Is Confidentiality Maintained?
Confidentiality is maintained through a combination of administrative, technical, and physical controls.
Common confidentiality controls include:
- Role-based access control
- Least privilege
- Multi-factor authentication
- Encryption at rest and in transit
- Data classification
- Access reviews
- Confidentiality agreements
- Security awareness training
- Secure file-sharing procedures
- Data loss prevention
- Logging and monitoring
- Physical access restrictions
- Vendor security reviews
- Data retention and disposal procedures
A control should be appropriate for the sensitivity of the information and the risks associated with unauthorized access or disclosure.
What Is a Confidentiality Breach?
A confidentiality breach occurs when information is accessed, used, shared, or exposed without proper authorization.
Examples include:
- An employee viewing customer information without a business need
- Sensitive information being sent to the wrong recipient
- A publicly accessible storage bucket containing private files
- Stolen credentials being used to access an internal system
- Confidential documents being shared through an unauthorized service
- A former employee retaining access after leaving the organization
- An application exposing information belonging to another customer
- An unencrypted device containing sensitive data being lost or stolen
A confidentiality breach does not always require a malicious attack. Accidental disclosures, incorrect permissions, and configuration mistakes can also compromise confidentiality.
Confidentiality in SOC 2
Confidentiality is one of the optional SOC 2 Trust Services Categories. It applies when information designated as confidential must be protected throughout its lifecycle.
An organization may include the Confidentiality category in its SOC 2 examination when it handles information such as customer data, business plans, intellectual property, or contractual information that requires specific protection.
Security is included in every SOC 2 examination. Confidentiality is added when it is relevant to the organization’s services, commitments, and system requirements.
Confidentiality in ISO/IEC 27001
ISO/IEC 27001 treats confidentiality as one of the three primary principles of information security, alongside integrity and availability.
An information security management system uses risk management, policies, processes, and controls to preserve these principles. For confidentiality, this means ensuring that only authorized people and systems can access protected information.
Confidentiality vs. Privacy
Confidentiality and privacy are related, but they are not identical.
Confidentiality focuses on preventing unauthorized access to or disclosure of protected information. It can apply to personal and nonpersonal information, including financial records, trade secrets, source code, contracts, and security documentation.
Privacy focuses primarily on how personal information is collected, used, shared, retained, and protected. Privacy obligations may also give individuals rights concerning their personal data.
A privacy program depends on confidentiality controls, but confidentiality applies more broadly than privacy.
Confidentiality vs. Security
Security is the broader collection of safeguards used to protect systems, information, and operations.
Confidentiality is one objective of security. An organization may have strong availability and integrity controls while still failing to protect confidential information from unauthorized access.
An effective security program must balance confidentiality with integrity and availability based on the organization’s risks and obligations.
What Evidence Demonstrates Confidentiality Controls?
Auditors and assessors may review evidence showing that confidentiality controls were implemented and operated throughout the audit period.
Examples include:
- User access lists
- Access review records
- Access approval tickets
- Employee termination records
- Encryption configurations
- Data classification policies
- Confidentiality agreements
- Security training completion records
- System activity logs
- Vendor agreements
- Data retention schedules
- Incident response records
- Data disposal records
- Screenshots of security configurations
The evidence should demonstrate both how the control was designed and whether it operated consistently during the period under review.
How AuditFlo Supports Confidentiality Controls
AuditFlo helps organizations maintain a continuous record of the activities used to protect confidential information.
Evidence from access reviews, approvals, system configurations, change records, and other operational sources can be collected and organized as work occurs. This allows compliance teams to show how confidentiality controls operated throughout the audit period without relying on a last-minute evidence collection effort.
AuditFlo supports the evidence layer of an existing compliance program. It does not replace the organization’s security controls, GRC platform, or compliance framework.
Frequently Asked Questions
What is confidentiality in simple terms?
Confidentiality means keeping protected information private and making sure it is only available to people or systems that are authorized to access it.
Is confidentiality the same as encryption?
No. Encryption is one control that can help protect confidentiality. Confidentiality also depends on access restrictions, authentication, policies, monitoring, training, and other safeguards.
Is confidentiality required for SOC 2?
Security is required in every SOC 2 examination. Confidentiality is an optional Trust Services Category that may be included when protecting confidential information is relevant to the organization’s services and commitments.
What is the CIA triad?
The CIA triad is a common information security model consisting of confidentiality, integrity, and availability. Together, these principles help organizations determine how information and systems should be protected.
Can internal information be confidential?
Yes. Confidential information can include internal business records, employee information, source code, financial data, security documentation, intellectual property, and other information that is not intended for public disclosure.
Who is responsible for confidentiality?
Confidentiality is a shared responsibility. Leadership establishes expectations, security and technology teams implement safeguards, control owners maintain specific processes, and employees are responsible for handling information appropriately.