Many security assessments ask a familiar question: Is your data encrypted at rest and in transit?
For many organizations, a “yes” can feel like a sign that sensitive data is secure. But that answer can create a false sense of protection.
Encryption at rest and encryption in transit are important. They are also not enough.
Technologies such as Transparent Data Encryption, or TDE, and Transport Layer Security, or TLS, help organizations meet common security requirements. TDE helps protect data stored on physical media. TLS helps protect data as it moves between systems. Both are valuable.
But neither fully protects sensitive data while it is being used, processed or accessed by applications, databases and users.
That is the gap OnData is built to address.
The Misconception Around Encryption
For years, organizations have treated encryption at rest and encryption in transit as the standard benchmark for data protection.
That makes sense on the surface. If data is encrypted when stored and encrypted when moving across a network, it may seem secure.
But modern attacks often do not target only storage devices or network traffic. Attackers compromise credentials, exploit applications, abuse privileges, use malware, target memory and gain access through trusted systems.
In those scenarios, data may still be exposed in readable form.
The real question is not simply whether data is encrypted at rest or in transit. The better question is: When and where does sensitive data become readable?
Where TDE Helps — And Where It Falls Short
Transparent Data Encryption is commonly used to meet encryption-at-rest requirements. It encrypts database files at the storage level, helping protect data if someone steals a physical disk, accesses raw storage or takes an image of the storage device.
That protection matters.
But TDE has a major limitation. When the database engine needs to use the data, it decrypts the data so the system can process it. That means sensitive information may be available in readable form through the database engine, application logic, memory or authorized-looking access paths.
In other words, TDE protects against a narrow set of attack vectors. It does not fully protect against many common threats organizations face today, including compromised credentials, overprivileged users, insider misuse, application compromise or attacks that access data through normal database operations.
Where TLS Helps — And Where It Falls Short
TLS is commonly used to meet encryption-in-transit requirements. It helps protect information as it moves between systems, applications, APIs and users.
That is essential.
But TLS protects the communication channel, not necessarily the data after it reaches its destination. If an attacker compromises a valid account, endpoint, application or internal system, TLS does not stop the attacker from viewing or extracting sensitive data that the system is allowed to access.
TLS also does not solve memory-based risks, insider misuse or data exposure after the connection is complete.
Meeting the minimum requirement for encryption in transit does not mean sensitive data is fully protected.
The Real Pain Point: Data Is Exposed When It Is in Use
The biggest gap in many data protection strategies is data in use.
Sensitive data often becomes readable when it is queried, processed, displayed, exported, loaded into reports or used by an application. That is exactly when attackers may try to access it.
Common risks include:
- Compromised user credentials.
- Spear-phishing attacks.
- Insider threats.
- Overprivileged accounts.
- Application vulnerabilities.
- Memory-based attacks.
- Database access through legitimate-looking queries.
- Sensitive data copied into reports, files or downstream systems.
Encryption at rest and in transit help, but they do not close these gaps by themselves.
What a Stronger Data Security Model Requires
A stronger approach keeps sensitive data protected for as much of its lifecycle as possible.
That means sensitive data should remain encrypted by default. It should only be decrypted when an authorized user or approved process has a legitimate need to see it. At all other times, the data should remain protected.
This model helps reduce exposure across more attack vectors while still allowing business applications and users to work efficiently.
The goal is not to make data unusable. The goal is to make sensitive data available only when access is authorized and necessary.
How OnData Helps
OnData helps organizations move beyond basic encryption requirements with a data security platform designed to protect sensitive data at all times.
With OnData’s Runtime Encryption technology, sensitive data can remain encrypted not only at rest and in transit, but also while it is being processed and used. Data is only revealed when an authorized user or approved process has the proper permissions.
This helps organizations create a true Need-to-Know Data environment.
OnData can help protect sensitive and regulated data such as personally identifiable information, protected health information, payment data, criminal justice information, education records, employee records, customer data and other confidential business information.
Protecting Against More Real-World Attack Vectors
OnData is designed to help close the gap left by traditional encryption tools.
TDE may protect stored files. TLS may protect network traffic. OnData helps protect the sensitive data itself.
That means organizations can reduce risk from credential compromise, insider misuse, application-level exposure, unauthorized access and data movement across systems.
With OnData, businesses can:
- Keep sensitive data encrypted by default.
- Enforce need-to-know access controls.
- Protect data while it is stored, moving and in use.
- Reduce exposure from compromised accounts.
- Support compliance and audit readiness.
- Protect sensitive data without requiring major application disruption.
- Improve security while maintaining business usability.
The Better Question to Ask
Security assessments should not stop at asking whether data is encrypted at rest and in transit.
They should also ask:
Who can see the data when it is in use?
When does the data become readable?
Can overprivileged users access sensitive fields?
What happens if credentials are compromised?
Is sensitive data protected after it leaves the original system?
Can access be audited at the data level?
Those questions get closer to the real risk.
Encryption at Rest and in Transit Are Not Enough
TDE and TLS are important security controls. They help organizations meet key requirements and protect against specific risks.
But they do not fully protect sensitive data from the threats organizations face today.
A true data security platform must keep sensitive data protected until an authorized user needs to see it. That is the only way to close the remaining gaps while maintaining a practical path for modern applications and business workflows.
OnData helps organizations make that shift.
Because sensitive data should not only be protected when it is stored or transmitted. It should be protected whenever it is not explicitly needed by someone authorized to use it.
