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* Products  
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  * [SaaS Security](https://www.paloaltonetworks.com/sase/saas-security?ts=markdown)  
    [AI-Driven Security Operations Platform](https://www.paloaltonetworks.com/cortex?ts=markdown)
  
  * [Cloud Security](https://www.paloaltonetworks.com/cortex/cloud?ts=markdown)
  
  * [Cortex Cloud](https://www.paloaltonetworks.com/cortex/cloud?ts=markdown)
  
  * [Application Security](https://www.paloaltonetworks.com/cortex/cloud/application-security?ts=markdown)
  
  * [Cloud Posture Security](https://www.paloaltonetworks.com/cortex/cloud/cloud-posture-security?ts=markdown)
  
  * [Cloud Runtime Security](https://www.paloaltonetworks.com/cortex/cloud/runtime-security?ts=markdown)
  
  * [Prisma Cloud](https://www.paloaltonetworks.com/prisma/cloud?ts=markdown)
  
  * [AI-Driven SOC](https://www.paloaltonetworks.com/cortex?ts=markdown)
  
  * [Cortex XSIAM](https://www.paloaltonetworks.com/cortex/cortex-xsiam?ts=markdown)
  
  * [Cortex XDR](https://www.paloaltonetworks.com/cortex/cortex-xdr?ts=markdown)
  
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  * [Cortex XSOAR](https://www.paloaltonetworks.com/cortex/cortex-xsoar?ts=markdown)
  
  * [Cortex Exposure Management](https://www.paloaltonetworks.com/cortex/exposure-management?ts=markdown)
  
  * [Cortex Xpanse](https://www.paloaltonetworks.com/cortex/cortex-xpanse?ts=markdown)
  
  * [Cortex Advanced Email Security](https://www.paloaltonetworks.com/cortex/advanced-email-security?ts=markdown)
  
  * [Unit 42 Managed Detection \& Response](https://www.paloaltonetworks.com/cortex/managed-detection-and-response?ts=markdown)
  
  * [Unit 42 Managed XSIAM](https://www.paloaltonetworks.com/cortex/managed-xsiam?ts=markdown)

* Solutions  
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  Secure AI by Design
  
  * [Secure AI Ecosystem](https://www.paloaltonetworks.com/prisma/prisma-ai-runtime-security?ts=markdown)
  * [Secure GenAI Usage](https://www.paloaltonetworks.com/sase/ai-access-security?ts=markdown)  
    Network Security
  * [Cloud Network Security](https://www.paloaltonetworks.com/network-security/software-firewalls?ts=markdown)
  * [Data Center Security](https://www.paloaltonetworks.com/network-security/data-center?ts=markdown)
  * [DNS Security](https://www.paloaltonetworks.com/network-security/advanced-dns-security?ts=markdown)
  * [Intrusion Detection and Prevention](https://www.paloaltonetworks.com/network-security/advanced-threat-prevention?ts=markdown)
  * [Device Security](https://www.paloaltonetworks.com/network-security/device-security?ts=markdown)
  * [OT Security](https://www.paloaltonetworks.com/network-security/ot-device-security?ts=markdown)
  * [5G Security](https://www.paloaltonetworks.com/network-security/5g-security?ts=markdown)
  * [Secure All Apps, Users and Locations](https://www.paloaltonetworks.com/sase/secure-users-data-apps-devices?ts=markdown)
  * [Secure Branch Transformation](https://www.paloaltonetworks.com/sase/secure-branch-transformation?ts=markdown)
  * [Secure Work on Any Device](https://www.paloaltonetworks.com/sase/secure-work-on-any-device?ts=markdown)
  * [VPN Replacement](https://www.paloaltonetworks.com/sase/vpn-replacement-for-secure-remote-access?ts=markdown)
  * [Web \& Phishing Security](https://www.paloaltonetworks.com/network-security/advanced-url-filtering?ts=markdown)  
    Cloud Security
  * [Application Security Posture Management (ASPM)](https://www.paloaltonetworks.com/cortex/cloud/application-security-posture-management?ts=markdown)
  * [Software Supply Chain Security](https://www.paloaltonetworks.com/cortex/cloud/software-supply-chain-security?ts=markdown)
  * [Code Security](https://www.paloaltonetworks.com/cortex/cloud/code-security?ts=markdown)
  * [Cloud Security Posture Management (CSPM)](https://www.paloaltonetworks.com/cortex/cloud/cloud-security-posture-management?ts=markdown)
  * [Cloud Infrastructure Entitlement Management (CIEM)](https://www.paloaltonetworks.com/cortex/cloud/cloud-infrastructure-entitlement-management?ts=markdown)
  * [Data Security Posture Management (DSPM)](https://www.paloaltonetworks.com/cortex/cloud/data-security-posture-management?ts=markdown)
  * [AI Security Posture Management (AI-SPM)](https://www.paloaltonetworks.com/cortex/cloud/ai-security-posture-management?ts=markdown)
  * [Cloud Detection \& Response](https://www.paloaltonetworks.com/cortex/cloud-detection-and-response?ts=markdown)
  * [Cloud Workload Protection (CWP)](https://www.paloaltonetworks.com/cortex/cloud/cloud-workload-protection?ts=markdown)
  * [Web Application \& API Security (WAAS)](https://www.paloaltonetworks.com/cortex/cloud/web-app-api-security?ts=markdown)  
    Security Operations
  * [Cloud Detection \& Response](https://www.paloaltonetworks.com/cortex/cloud-detection-and-response?ts=markdown)
  * [Security Information and Event Management](https://www.paloaltonetworks.com/cortex/modernize-siem?ts=markdown)
  * [Network Security Automation](https://www.paloaltonetworks.com/cortex/network-security-automation?ts=markdown)
  * [Incident Case Management](https://www.paloaltonetworks.com/cortex/incident-case-management?ts=markdown)
  * [SOC Automation](https://www.paloaltonetworks.com/cortex/security-operations-automation?ts=markdown)
  * [Threat Intel Management](https://www.paloaltonetworks.com/cortex/threat-intel-management?ts=markdown)
  * [Managed Detection \& Response](https://www.paloaltonetworks.com/cortex/managed-detection-and-response?ts=markdown)
  * [Attack Surface Management](https://www.paloaltonetworks.com/cortex/cortex-xpanse/attack-surface-management?ts=markdown)
  * [Compliance Management](https://www.paloaltonetworks.com/cortex/cortex-xpanse/compliance-management?ts=markdown)
  * [Internet Operations Management](https://www.paloaltonetworks.com/cortex/cortex-xpanse/internet-operations-management?ts=markdown)
  * [Extended Data Lake (XDL)](https://www.paloaltonetworks.com/cortex/cortex-xdl?ts=markdown)
  * [Agentic Assistant](https://www.paloaltonetworks.com/cortex/cortex-agentic-assistant?ts=markdown)  
    Endpoint Security
  * [Endpoint Protection](https://www.paloaltonetworks.com/cortex/endpoint-protection?ts=markdown)
  * [Extended Detection \& Response](https://www.paloaltonetworks.com/cortex/detection-and-response?ts=markdown)
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  * [Small \& Medium Business Solutions](https://www.paloaltonetworks.com/industry/small-medium-business-portfolio?ts=markdown)

* Services  
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  [Threat Intel and Incident Response Services](https://www.paloaltonetworks.com/unit42?ts=markdown)
  
  * [Assess](https://www.paloaltonetworks.com/unit42/assess?ts=markdown)
  
  * [AI Security Assessment](https://www.paloaltonetworks.com/unit42/assess/ai-security-assessment?ts=markdown)
  
  * [Attack Surface Assessment](https://www.paloaltonetworks.com/unit42/assess/attack-surface-assessment?ts=markdown)
  
  * [Breach Readiness Review](https://www.paloaltonetworks.com/unit42/assess/breach-readiness-review?ts=markdown)
  
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  * [Cloud Security Assessment](https://www.paloaltonetworks.com/unit42/assess/cloud-security-assessment?ts=markdown)
  
  * [Compromise Assessment](https://www.paloaltonetworks.com/unit42/assess/compromise-assessment?ts=markdown)
  
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  * [M\&A Cyber Due Diligence](https://www.paloaltonetworks.com/unit42/assess/mergers-acquisitions-cyber-due-diligence?ts=markdown)
  
  * [Penetration Testing](https://www.paloaltonetworks.com/unit42/assess/penetration-testing?ts=markdown)
  
  * [Purple Team Exercises](https://www.paloaltonetworks.com/unit42/assess/purple-teaming?ts=markdown)
  
  * [Ransomware Readiness Assessment](https://www.paloaltonetworks.com/unit42/assess/ransomware-readiness-assessment?ts=markdown)
  
  * [SOC Assessment](https://www.paloaltonetworks.com/unit42/assess/soc-assessment?ts=markdown)
  
  * [Supply Chain Risk Assessment](https://www.paloaltonetworks.com/unit42/assess/supply-chain-risk-assessment?ts=markdown)
  
  * [Tabletop Exercises](https://www.paloaltonetworks.com/unit42/assess/tabletop-exercise?ts=markdown)
  
  * [Unit 42 Retainer](https://www.paloaltonetworks.com/unit42/retainer?ts=markdown)
  
  * [Respond](https://www.paloaltonetworks.com/unit42/respond?ts=markdown)
  
  * [Cloud Incident Response](https://www.paloaltonetworks.com/unit42/respond/cloud-incident-response?ts=markdown)
  
  * [Digital Forensics](https://www.paloaltonetworks.com/unit42/respond/digital-forensics?ts=markdown)
  
  * [Incident Response](https://www.paloaltonetworks.com/unit42/respond/incident-response?ts=markdown)
  
  * [Managed Detection and Response](https://www.paloaltonetworks.com/unit42/respond/managed-detection-response?ts=markdown)
  
  * [Managed Threat Hunting](https://www.paloaltonetworks.com/unit42/respond/managed-threat-hunting?ts=markdown)
  
  * [Managed XSIAM](https://www.paloaltonetworks.com/cortex/managed-xsiam?ts=markdown)
  
  * [Unit 42 Retainer](https://www.paloaltonetworks.com/unit42/retainer?ts=markdown)
  
  * [Transform](https://www.paloaltonetworks.com/unit42/transform?ts=markdown)
  
  * [IR Plan Development and Review](https://www.paloaltonetworks.com/unit42/transform/incident-response-plan-development-review?ts=markdown)
  
  * [Security Program Design](https://www.paloaltonetworks.com/unit42/transform/security-program-design?ts=markdown)
  
  * [Virtual CISO](https://www.paloaltonetworks.com/unit42/transform/vciso?ts=markdown)
  
  * [Zero Trust Advisory](https://www.paloaltonetworks.com/unit42/transform/zero-trust-advisory?ts=markdown)  
    [Global Customer Services](https://www.paloaltonetworks.com/services?ts=markdown)
  
  * [Education \& Training](https://www.paloaltonetworks.com/services/education?ts=markdown)
  
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    UNIT 42 RETAINER
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* Partners  
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  * [Solution Providers](https://www.paloaltonetworks.com/partners/nextwave-solution-providers?ts=markdown)
  * [Managed Security Service Providers](https://www.paloaltonetworks.com/partners/managed-security-service-providers?ts=markdown)
  * [XMDR Partners](https://www.paloaltonetworks.com/partners/managed-security-service-providers/xmdr?ts=markdown)  
    Take Action
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  * [Become a Partner](https://paloaltonetworks.my.site.com/NextWavePartnerProgram/s/partnerregistration?type=becomepartner)
  * [Request Access](https://paloaltonetworks.my.site.com/NextWavePartnerProgram/s/partnerregistration?type=requestaccess)
  * [Find a Partner](https://paloaltonetworks.my.site.com/NextWavePartnerProgram/s/partnerlocator)  
    [CYBERFORCE
    CYBERFORCE represents the top 1% of partner engineers trusted for their security expertise.
    Learn more](https://www.paloaltonetworks.com/cyberforce?ts=markdown)

* Company  
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  Palo Alto Networks
  
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  * [Precision AI Security](https://www.paloaltonetworks.com/precision-ai-security?ts=markdown)
  * [Our Platform Approach](https://www.paloaltonetworks.com/why-paloaltonetworks/platformization?ts=markdown)
  * [Accelerate Your Cybersecurity Transformation](https://www.paloaltonetworks.com/why-paloaltonetworks/nam-cxo-portfolio?ts=markdown)
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    Careers
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    Read more](https://www.paloaltonetworks.com/company/press/2021/palo-alto-networks-secures-top-ranking-on-newsweek-s-most-loved-workplaces-list-for-2021?ts=markdown)

* More  
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  * [Threat Vector Podcast](https://unit42.paloaltonetworks.com/unit-42-threat-vector-podcast/)
  * [Packet Pushers Podcasts](https://www.paloaltonetworks.com/podcasts/packet-pusher?ts=markdown)  
    Connect
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3. [What Is Remote Browser Isolation (RBI)?](https://www.paloaltonetworks.com/cyberpedia/what-is-remote-browser-isolation?ts=markdown)  
   Table of Contents

* [How Does Remote Browser Isolation Work?](#how)
* [Evolution of Remote Browser Isolation](#evolution-of-rbi)
* [Why Is Remote Browser Isolation Important?](#why)
* [Benefits of Remote Browser Isolation](#benefits)
* [Challenges of Remote Browser Isolation](#challenges)
* [The Role of RBI in SASE Architecture](#role)
* [RBI FAQs](#faq)

# What Is Remote Browser Isolation (RBI)?

5 min. read  
Table of Contents

* [How Does Remote Browser Isolation Work?](#how)
* [Evolution of Remote Browser Isolation](#evolution-of-rbi)
* [Why Is Remote Browser Isolation Important?](#why)
* [Benefits of Remote Browser Isolation](#benefits)
* [Challenges of Remote Browser Isolation](#challenges)
* [The Role of RBI in SASE Architecture](#role)
* [RBI FAQs](#faq)

1. How Does Remote Browser Isolation Work?

* [1. How Does Remote Browser Isolation Work?](#how)
* [2. Evolution of Remote Browser Isolation](#evolution-of-rbi)
* [3. Why Is Remote Browser Isolation Important?](#why)
* [4. Benefits of Remote Browser Isolation](#benefits)
* [5. Challenges of Remote Browser Isolation](#challenges)
* [6. The Role of RBI in SASE Architecture](#role)
* [7. RBI FAQs](#faq)

Remote browser isolation (RBI) is a web security technology that isolates users' internet browsing activities in a remote environment. By hosting browsing sessions on a separate server, RBI prevents web content from reaching and executing on the user's device. This approach safeguards against potential web threats while maintaining the browsing experience.

## How Does Remote Browser Isolation Work?

![Remote browser isolation in 4 steps: User sends web requests, RBI server isolates and processes content, information is safely rendered graphically for user, active web content is checked for malware. Between steps, actions like blocking malicious content, file uploads, and form posts are depicted.](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/how-remote-browser-isolation-works.png "Remote browser isolation in 4 steps: User sends web requests, RBI server isolates and processes content, information is safely rendered graphically for user, active web content is checked for malware. Between steps, actions like blocking malicious content, file uploads, and form posts are depicted.")

Remote browser isolation processes web content in a cloud-based, isolated environment. When a user attempts to access a webpage, the session is initiated within the remote container, away from the user's device. Any potential threats within the webpage are confined to this isolated space, preventing website code from executing on endpoints. The user then receives a safe, visual representation of the content.

This ensures that the user interacts only with a sanitized version of the webpage via the remote web browser, minimizing the risk of web-based threats. When encountering a website with potentially malicious code, RBI ensures that users are protected.

## Evolution of Remote Browser Isolation

![Evolution of Remote Browser Isolation](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/evolution-of-remote-browser-isolation.png "Evolution of Remote Browser Isolation")

Remote browser isolation technologies have evolved over the years to balance performance with security. RBI has traditionally worked alongside [secure web gateways](https://www.paloaltonetworks.com/cyberpedia/what-is-secure-web-gateway?ts=markdown), producing transient remote browser containers for potentially malicious websites and malicious content.

Remote browser isolation must also ensure unhindered access to internet users accessing webpages and applications. Running browser sessions remotely can disrupt user workflows, so RBI approaches have evolved to try and match web traffic and site interactivity demands over time.

### First Generation (Pixel Pushing)

This method processes web content on a remote server. It sends the visual representation of the page to user devices pixel by pixel. Pixel pushing ensures strong security through complete separation but demands high bandwidth. This increases costs and impacts user experience.

### Second Generation (DOM-based)

This uses a Document Object Model (DOM) based method. It processes web content and then reconstructs the page on the user's device. The DOM-based method performs better than the pixel-pushing method but can expose users to malicious files and threats.

### Third Generation (SKIA)

This uses an open-source 2D graphics library. It renders the webpage through a SKIA layer and addresses gaps found in pixel and DOM-based methods. The SKIA method lacks versatility for dynamic applications.

## Why Is Remote Browser Isolation Important?

Migration to the cloud has made browsers essential tools for data access. This efficiency also exposes systems to vulnerabilities. Cybercriminals exploit browsers for cyberattacks using malicious extensions, malvertising, and browser-based trojans, among others. Interaction with compromised web content turns web browsing activity into potential threat entry points. In addition to browser-based attacks and vulnerabilities, zero-day malware can pose significant security risks. Unfortunately, there are no web security solutions that can address 100% of zero-day web attacks.

Individuals with access to critical data or privileged credentials, such as engineers, executives, and supply chain managers, are frequently targeted. Data breaches involving the human element account for 74% of cases.1 Protecting these individuals is paramount.

Remote browser isolation addresses these challenges by creating a web isolation mechanism that confines browser sessions in cloud-based sandboxes. This mechanism fully air-gaps web content from user devices, ensuring that even if malicious content is encountered, the threat is contained and doesn't reach the primary network. RBI serves as an added layer of security enforcement, especially against zero-day web threats, and offers a balanced approach to managing unknown or high-risk content without having to block it entirely.

1\.[Verizon 2023 Data Breach Investigations Report](https://www.verizon.com/business/resources/reports/dbir/)

## Benefits of Remote Browser Isolation

![Benefits of Remote Browser Isolation](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/benefits-of-browser-isolation.png "Benefits of Remote Browser Isolation")

### Protection from Zero-Day Threats

RBI ensures that users can access content on the web without any direct interaction with malicious elements. By isolating web sessions in the cloud, it delivers safe rendering of web content, effectively eliminating threats. RBI also minimizes the impact of novel browser vulnerabilities. Since the browsing session is isolated, even unidentified vulnerabilities have limited potential to cause harm.

### Data Loss Prevention

RBI shields sensitive data from threats embedded in webpages or downloadable content. This approach reduces the risk of data breaches due to compromised pages or unsafe plugins. Additionally, RBI's data loss prevention controls restrict user actions like cutting, copying, pasting, printing, and entering keyboard inputs. RBI permits only remote rendering of files, further strengthening browser-based data protection.

### Insight and Visibility

IT security teams can gain valuable insight into users' internet browsing activities, which can be used for compliance monitoring and regulatory audits. Organizations can even detect anomalous behavior that may be indicative of insider threats.

## Challenges of Remote Browser Isolation

![Challenges of RBI](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/challenges-of-rbi.png "Challenges of RBI")

### Increased Latency

RBI processes require redirecting browser traffic through a cloud-based system, which can introduce delays. Latency issues can lead to a suboptimal browsing experience for the user, especially when accessing content-rich webpages or streaming media.

### Compatibility Concerns

Certain webpages with intricate designs or complex functionalities may not render properly in a remote browser environment. This can result in broken layouts, missing elements, or loss of interactive features, affecting the user's ability to interact with the website as intended.

### Infrastructure Load

Implementing RBI means that all web content is streamed as visual data to users, demanding substantial bandwidth. Such extensive streaming can place a significant strain on existing infrastructure, potentially leading to slowdowns or disruptions.

### Cost Considerations

Adopting remote browser isolation requires considerable computing resources. The need to route and analyze all of an organization's web traffic in the cloud can result in increased costs, especially when scaled across a large number of users or high-traffic environments.

## The Role of RBI in SASE Architecture

![The role of RBI in SASE](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/the-role-of-rbi-in-sase.png "The role of RBI in SASE")

Secure Access Service Edge (SASE) architecture integrates networking and security services to provide comprehensive cloud-based protection. A pivotal component of this security structure is Remote Browser Isolation (RBI).

RBI operates on the foundational principle that web content is inherently risky. This method ensures that potential threats from the web do not reach the user's device.

Within the SASE framework, RBI complements secure web gateways (SWG). While SWG filters and monitors web traffic for threats, it can't guarantee complete safety from all zero-day threats. This is where RBI steps in. For web domains or pages deemed uncertain or risky, RBI provides an added layer of security.

## RBI FAQs

### Do I need remote browser isolation?

Whether you need remote browser isolation depends on your security priorities. RBI offers enhanced protection by isolating web browsing from user devices, minimizing risks from web-based threats. If safeguarding against these threats is paramount for your use or business, considering RBI could be beneficial.

### What is the difference between browser isolation and remote browser isolation?

Browser isolation processes web content in isolated environments on the user's device. In contrast, remote browser isolation processes web content on a separate, external server, delivering only safe visuals to the user's device, keeping potential threats remote.

### What are the types of remote browser isolation?

Remote browser isolation technologies have evolved over the years to balance performance with security. Methods include pixel pushing (first generation), DOM-based (second generation), and SKIA (third generation).

### What are the disadvantages of browser isolation?

Challenges associated with RBI primarily stem from legacy solutions. Older RBI methods can disrupt user workflows, demand high bandwidth, or expose users to potential threats. However, the technology itself is widely recognized as beneficial for enhancing security posture, especially considering modern advancements.

### What is an example of browser isolation?

An example of browser isolation is when a user accesses a potentially risky website, and the browser runs the session within a virtual container. This container separates the web content from the main operating system, preventing malicious code from affecting the user's device. After the session ends, the container is discarded, ensuring no residual threats persist.
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