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Disk Encryption or File Encryption: Why You Must Have Both to Keep Data Secure
Disk encryption checks a box, but fails against insider threats or stolen credentials. Learn why file-centric security is an essential layer on top of disk encryption to truly protect sensitive data.
Written by
Hari Indukuri (CTO) and Chris Dailey (CRO)
Published On
Apr 22, 2025



In today’s connected world disk encryption may check a security box but it is ineffective at protecting against the most common ways data is stolen by insiders or external bad actors who are using valid credentials. Learn why file-centric security is an essential layer on top of disk encryption and TLS to truly protect sensitive data.
Ask a CISO, CIO, or IT professional if their company files are encrypted and ninety-nine percent will respond yes. Ask this same group if their files are encrypted so they are protected from theft by someone who is inside their network or device, and ninety-nine percent will say no.
How can there be such a discrepancy even though everyone believes their files are encrypted?
The ninety-nine percent that say their files are encrypted are referring to disk encryption and not file encryption. Disk encryption is the most rudimentary level of protection that almost one-hundred percent of organizations have. But it protects against the most basic level of intrusion and wasn’t made to combat the most common ways data is stolen, e.g. insider theft, network breach, or network breach of a third party or vendor.
This article explores key distinctions between disk encryption and file-level encryption, and examines the critical need for file encryption to thwart ransomware attacks and data theft by insiders and external bad actors.
What is Disk Encryption?
Disk encryption is a security method that encodes data stored on a computer's hard drive or storage system, making it unreadable without the user and password (appropriate encryption key). Disk Encryption primarily protects data at rest when the device is shut down, ensuring that unauthorized individuals without the password cannot access the information even if they physically obtain the device or hard drive. When the user credentials are entered, the disk is decrypted and the files can be freely accessed and moved. Disk encryption does not even provide encryption at rest, when a user is logged in. Disk encryption protection is only as strong as the user credentials and vulnerable to weak passwords, phishing exploits, and credential-based attacks that bypass traditional access controls.
Disk encryption is sufficient for protecting against device theft or loss, but becomes ineffective in situations where bad actors or insiders acting with negligence or bad intentions are already inside the network or device. Disk encryption is not designed to control the flow of information in and out of the organization.
Marketing in the cloud sharing space can add additional confusion about file safety and encryption through claims of “added” security. For example, cloud service providers, like SharePoint and Dropbox, and document management systems, such as NetDocuments and iManage, often highlight their strong security measures, including claims of "double encryption." At first glance, "double encryption" sounds like robust protection, but in most instances, this just means disk encryption. In other words, the files themselves are not encrypted and still remain subject to theft should someone have valid credentials, which is the most common situation for most data theft.
Marketing in the cloud sharing space can add additional confusion about file safety and encryption through claims of “added” security.

What are the Gaps with Disk Encryption?
While disk encryption offers significant protection for data at rest under limited circumstances, it presents several challenges:
Limited Protection Against Active Threats: Once the system is booted and authenticated, data becomes accessible in decrypted form, making it vulnerable to insider threats, credential theft, or malware attacks.
Single Point of Failure: If the encryption key or password is compromised, the entire disk and all data become accessible.
Performance Issues: Encrypting and decrypting the entire disk can lead to performance degradation, affecting system responsiveness.
Disk encryption does not stop the most prevalent and damaging thefts of data that arise from insiders and bad actors who are inside your network.
While disk encryption provides effective protection against device theft or loss, its protections stop when bad actors or insiders acting with bad intentions are able to access the network or the device. File-level encryption picks up where disk encryption leaves off, ensuring that each file remains protected, no matter where it’s stored, shared, or accessed.
What is File-Centric Security or File-Level Encryption?
File-Centric Security applies a specifically strong type of encryption and strong access policies at the individual file level. Unlike disk encryption and TLS encryption, file-centric security protects you from credential-based and man-in-the middle attacks as files stay encrypted no matter where they are moved and accessed.
Too often people conflate disk encryption with file-level encryption believing that the two terms refer to providing the same level of security. In reality, disk encryption only secures data while it is stored as opposed to file-level encryption, which ensures data stays protected and compliant, no matter where it travels. Here's how it works.

How File-Centric Security Fills the Gaps
File-centric security builds a new level of security layer on top of disk encryption to give organizations power to prevent ransomware, mitigate insider threats, and manage third party risks.
What can you expect when you choose a File-Centric Security Platform?
Continuous Protection Against Active Threats: Files remain encrypted at all times, even when actively accessed or moved. Any violation of policies or attempts to exfiltrate are prevented by strict encryption that persists irrespective of the data’s location or state.
Eliminating Single Point of Failure: Each file has its own encryption key and access policy. If one key is compromised, only the associated file becomes vulnerable, significantly reducing risk.
Granular Control: Dynamic, role-based, or location-based access controls and encryption is tailored to individual files, allowing organizations precise control over data usage, visibility, and movement.
Mitigating Insider Threats: Unlike disk encryption, file-level encryption maintains protection even when files are accessed internally, restricting unauthorized internal viewing or alterations based on stringent access controls.
Preventing Ransomware Attacks: By encrypting individual files, even if attackers gain system-level access or admin credentials, the data remains encrypted and unusable to the attackers.
Protection from Credential Theft: File-level encryption safeguards files independently from user credentials. Even if user credentials are stolen, attackers cannot decrypt and misuse sensitive data without appropriate keys and permissions.
No Dependency on Data Classification: File-centric security eliminates the dependency on data classification accuracy, as it encrypts all files individually, and protection policies are enforced through strict access controls rather than classification, ensuring consistent security without extensive administrative overhead or user friction.
By addressing the core vulnerabilities that disk encryption leaves open, file-centric security delivers protection that’s persistent, adaptive, and effective regardless of where your files live or how they move. File-centric security platforms offer a smarter, more resilient way to secure your most valuable data.
FenixPyre’s File-Centric Security Platform
FenixPyre provides a comprehensive file-centric security solution, enhancing data security through advanced file encryption and dynamic access controls:
Military-Grade Encryption: Utilizes FIPS 140-2 validated AES-256 encryption, securing any file type, from standard office documents to specialized formats like CAD files.
Milliseconds of Latency: Every file is encrypted with a distinct encryption key. Encryption and decryption is optimized at a kernel-level implementation, with no noticeable impact to the client.
Strong and Performant Key Management: Every file key is encrypted and stored in a high-performance database. File keys can only be decrypted in a Hardware Security Module, where the master key is hosted. Customers can manage their own HSM. File contents are provably zero-knowledge to anyone outside of the client’s access list, including the possible external data management or cloud hosting solution.
Seamless User Experience: Offers frictionless integration into user workflows, ensuring files remain secure without impacting productivity.
Patented Dynamic and Context-Aware Access Controls: Implements robust role-based and location-based access restrictions and revocation capability, effectively reducing risk by controlling who can access files and under what conditions. Files remain protected even when stolen.
Comprehensive Compatibility: Supports encryption across various environments, including network shares, cloud storage platforms (SharePoint, AWS S3, Azure), and local file systems.
Real-Time Monitoring and Analytics: Integrates seamlessly with SIEM tools to provide real-time logs, behavioral analytics, anomaly detection, and proactive threat response capabilities, further enhancing organizational security posture.
While disk encryption provides foundational security for anyone accessing data on a device, file-centric security solutions, like FenixPyre ,offer superior protection against modern threats, ensuring comprehensive, adaptive, and user-friendly data security.
File-centric security doesn’t just reduce risk - it redefines control.
By encrypting sensitive files and enforcing access at the source, FenixPyre ensures your data stays protected no matter where it goes or who tries to access it. Even when someone is inside your network with valid credentials.
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© 2018-2025 FenixPyre Inc, All rights reserved

solutions
7775 Walton Parkway
Suite 224
New Albany, OH 43054

© 2018-2025 FenixPyre Inc, All rights reserved