# Cloudflare R2 Security Integration | Continuous FIM, DSPM & Ransomware Defense · tamper

> Secure your Cloudflare R2 buckets with continuous File Integrity Monitoring (FIM), DSPM posture auditing, and early ransomware detection via native S3 API.

## Edge-Ready S3 Security, FIM & DSPM for Cloudflare R2.

Protect your Cloudflare R2 AI datasets, web assets, and application buckets without egress fees. tamper connects natively to R2 S3 endpoints (`eu.r2.cloudflarestorage.com`) for continuous FIM, DSPM, and inline S3 Gateway protection.

## Why secure Cloudflare R2 storage with tamper?

Cloudflare R2 has become the go-to zero-egress object storage for modern web platforms, AI training pipelines, and edge Workers. tamper adds the missing cryptographic FIM, DSPM posture scoring, and ransomware detection layer to R2.

- **Prevent Poisoning of R2 Datasets & Assets** (01 / AI & DATA PIPELINE INTEGRITY): Verify SHA-256 baselines on AI training corpora, RAG vector sources, and static production assets stored in Cloudflare R2 to catch unauthorized tampering.
- **Deep Entropy & DLP Scanning at Zero Bandwidth Cost** (02 / ZERO-EGRESS INSPECTION): Because Cloudflare R2 charges $0 for egress bandwidth, tamper can perform deep content entropy checks and AI DLP classification without egress penalties.
- **Combine R2 with tamper S3 Gateway (DAM)** (03 / EDGE S3 GATEWAY SYNERGY): Pair R2 with tamper's Cloudflare Worker S3 Gateway (s3gw.com) to enforce real-time anti-wiper deletion quotas, CIDR/GeoIP filtering, and SIEM logging.

## Connect Cloudflare R2 in under 2 minutes

tamper connects natively via standard Cloudflare R2 read-only S3 API credentials with zero disruption to your existing workflows.

- **Provider**: `Cloudflare R2` (Pre-configured cloud storage connector)
- **Endpoint**: `<account_id>.eu.r2.cloudflarestorage.com` (e.g., <account_id>.eu.r2.cloudflarestorage.com)
- **Region**: `auto` (Cloudflare R2 region (auto, eu, weur))
- **Bucket Name**: `my-cloudflare-bucket` (Target private Cloudflare R2 bucket)
- **S3 Access Key & Secret**: `R2_ACCESS_KEY / R2_SECRET` (Read-Only S3 API credentials)

> Principle of Least Privilege: tamper strictly operates in Read-Only mode on Cloudflare R2. tamper never requests write or delete privileges on your production objects.

## Comprehensive Security Posture Across Cloudflare R2

- **FIM (File Integrity Monitoring) - Cryptographic Object Fingerprinting**: Tracks SHA-256 baselines across all Cloudflare R2 objects, identifying unauthorized modifications and silent corruption.
- **DSPM (Data Security Posture Management) - Bucket Configuration & Access Controls**: Continuously audits Cloudflare R2 bucket visibility, encryption settings, Object Lock, Versioning, and lifecycle rules against CIS security benchmarks.
- **DAM (Data Access Monitoring) - Access Anomaly & S3 Gateway Protection**: Monitors data access patterns and supports optional inline protection via the tamper S3 Gateway for real-time request filtering and anti-wiper quotas.
- **DLP (Data Loss Prevention & Ransomware Guard) - Entropy Qualification, AI Tagging & Canaries**: Detects encryption spikes (~7.99 Shannon entropy), qualifies document alterations with local AI, and monitors stealth canary objects.

## Technical Architecture: Native S3 API Compatibility with Cloudflare R2

tamper communicates with Cloudflare R2 over standard HTTPS S3 endpoints (<account_id>.eu.r2.cloudflarestorage.com) using AWS Signature Version 4 (SigV4).

- **1. Standard S3 SigV4 Protocol**: Full interoperability with your existing Cloudflare R2 pipelines, backup tools (Veeam, rclone, restic), and cloud-native applications.
- **2. 100% Agentless Operation**: Audits run externally on your dedicated VM or tamper appliance without deploying any software inside your compute instances.
- **3. Strict Read-Only Boundary**: Non-destructive cryptographic inspection ensures your object payloads, custom metadata, and version histories are never altered.

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*Source: [https://tamper.one/cloudflare](https://tamper.one/cloudflare) · Start a 30-day free trial at [https://tamper.one/demo](https://tamper.one/demo)*