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Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

Data Loss Prevention Strategies

DLP Overview

Data Loss Prevention (DLP) monitors and controls data in use, in motion, and at rest. A comprehensive DLP strategy covers three domains.

Network DLP

Inspect traffic for sensitive data leaving the network:

from scapy.all import *

import re

def packet_inspector(packet):

if packet.haslayer(Raw):

payload = str(packet[Raw].load)

Check for credit card patterns

if re.search(r"\b(?:\d[ -]*?){13,16}\b", payload):

print(f"[ALERT] Potential CC leak from {packet[IP].src}")

Trigger block or alert

return False

Check for API keys (length > 20, high entropy)

if len(payload) > 20 and has_high_entropy(payload):

print(f"[ALERT] High-entropy data from {packet[IP].src}")

return False

return True

def has_high_entropy(data, threshold=4.5):

from collections import Counter

freq = Counter(data)

entropy = -sum((c/len(data)) * math.log2(c/len(data)) for c in freq.values())

return entropy > threshold

Endpoint DLP

Control data movement on endpoints:

endpoint-dlp-rules.yaml

rules:

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\- name: Block USB transfer

trigger: usb_device_connect

action: block

conditions:

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\- device_type: mass_storage

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\- device_not_in_allowlist: true

user_notification: "USB mass storage is disabled"

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\- name: Monitor print of classified docs

trigger: print_job

action: alert

conditions:

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