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* 金融機関における「ブラウザ・ファースト」防御の必要...

# 金融機関における「ブラウザ・ファースト」防御の必要性

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[](mailto:?subject=金融機関における「ブラウザ・ファースト」防御の必要性)  
Link copied  
By [Masaki Watanabe](https://www.paloaltonetworks.com/blog/author/masaki-watanabe/?lang=ja&ts=markdown "Posts by Masaki Watanabe")  
Apr 26, 2026  
1 minutes  
[Financial Services](https://www.paloaltonetworks.com/blog/category/financial-services-ja/?lang=ja&ts=markdown)

デジタル変革が加速する中、金融業務の主戦場はSaaSや社内Webアプリケーションへと移行しました。ウェブブラウザは今や業務遂行に不可欠なツールですが、同時に、高度な機密情報を取り扱う金融機関にとっての「最大の弱点」へと変貌しています。一般のブラウザは個人利用を前提とした設計であり、企業レベルの防御には限界があるからです。

## Prisma Browserによる最前線の防御

![](https://www.paloaltonetworks.com/blog/wp-content/uploads/2026/04/tkasakake_20260422-よくわかる！Prisma-Browser-ウェビナーシリーズ第三弾.jpg)

機密性の高い金融データは、常に最も洗練されたサイバー攻撃の標的です。従来のセキュリティ対策をかいくぐる巧妙な手口に対し、Prisma Browserはブラウザのレイヤーで強固な防御を実現します。

* **エンドポイント脅威の徹底遮断 :** キーロガーやスクリーンスクレイパー（画面情報の不正取得）など、デバイス上で密かに動作するマルウェアによる情報窃取を、ブラウザ自体がブロックし、情報漏洩の隙間を塞ぎます。
* **アカウント乗っ取りの防止（リプレイアタック対策）** : 万が一、認証トークンが盗まれたとしても、不正な再送攻撃（リプレイアタック）によるなりすまし利用を未然に防止します。これにより、アカウント乗っ取りのリスクを最小限に抑えます。

## Prisma Browser：金融機関のセキュリティを変革する3つの柱

パロアルトネットワークスが提供する「Prisma Browser」は、以下の3つの柱で、セキュリティと利便性を両立させながら金融機関の安全を守ります。

**1. 可視性と制御による確実なガバナンス**

誰が、どのアプリケーションで、どのような機密操作を行っているかを詳細に可視化します。リスクのある行動はリアルタイムで制限し、管理者が求める厳格なガバナンスとコンプライアンスを確実に維持します。

**2. ゼロトラスト時代の強力なデータ保護（DLP）**

機密性の高い顧客データが、未許可のAIチャットツールや私的なクラウドストレージへコピー＆ペーストされるのを防ぎます。さらに、スクリーンショット禁止、Web会議中の機密画面の自動非表示、識別可能なウォーターマーク（透かし）の適用といった多層的な対策により、あらゆる情報流出経路を遮断します。

**3. VDIからの脱却とシームレスなアクセス管理**

遅く複雑になりがちだったVDI（仮想デスクトップ基盤）から脱却し、ユーザーが求めるシームレスな体験を実現します。特定のセキュリティブラウザを通じて社内リソースへ安全かつ快適にアクセスできる環境を構築します。

## 結論

ブラウザはもはや単なる閲覧ソフトではなく、金融業務における「新しいセキュリティの要」です。パロアルトネットワークスの「ブラウザ・ファースト」のアプローチは、複雑なインフラを簡素化しながら、最も重要な資産であるデータを保護します。

**詳細はこちら（原文：英語）** 金融機関がブラウザ・ファーストの防御を必要とする詳細な理由や、具体的なユースケースについては、以下のグローバルブログをご確認ください。

[Why Financial Institutions Need a Browser-First Defense](https://www.paloaltonetworks.com/blog/sase/why-financial-institutions-need-a-browser-first-defense/)

*** ** * ** ***

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