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rudy_candy

Ex-network engineer, now a vulnerability assessor in Japan. I write about real-world pentesting, how I broke into security, and what the job actually looks like inside Japan's security industry.

Location Japan Joined Joined on  github website
I run a one-person game studio on Claude Code. Two months, 7 games, about $1 in ad revenue.

I run a one-person game studio on Claude Code. Two months, 7 games, about $1 in ad revenue.

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3 min read
What people get wrong about penetration testing

What people get wrong about penetration testing

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2 min read
The skills that actually transfer: what to learn for a long career in IT

The skills that actually transfer: what to learn for a long career in IT

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2 min read
How I pass IT certifications in about 3 months while working full-time

How I pass IT certifications in about 3 months while working full-time

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2 min read
A Day in the Life of a Vulnerability Assessor in Japan

A Day in the Life of a Vulnerability Assessor in Japan

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4 min read
strings Command in CTF: Hidden Data Guide

strings Command in CTF: Hidden Data Guide

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9 min read
pngcheck in CTF: How to Analyze and Repair PNG Files

pngcheck in CTF: How to Analyze and Repair PNG Files

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12 min read
Scan Surprise picoCTF Writeup

Scan Surprise picoCTF Writeup

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3 min read
CTF Audio Challenges: A Practical SoX Combat Guide

CTF Audio Challenges: A Practical SoX Combat Guide

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15 min read
fdisk in CTF: Partition Analysis and Common Challenge Patterns

fdisk in CTF: Partition Analysis and Common Challenge Patterns

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13 min read
binwalk in CTF: Spot False Positives Fast

binwalk in CTF: Spot False Positives Fast

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6 min read
CTF Forensics Tools: The Ultimate Guide for Beginners

CTF Forensics Tools: The Ultimate Guide for Beginners

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6 min read
RED picoCTF Writeup

RED picoCTF Writeup

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8 min read
Includes picoCTF Writeup

Includes picoCTF Writeup

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7 min read
steghide in CTF: Extract Flags

steghide in CTF: Extract Flags

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5 min read
Corrupted File picoCTF Writeup

Corrupted File picoCTF Writeup

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10 min read
Crack the Power picoCTF Writeup

Crack the Power picoCTF Writeup

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3 min read
Disk Image Forensics: Why mount Fails and How to Make the Right Call First

Disk Image Forensics: Why mount Fails and How to Make the Right Call First

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7 min read
zbarimg in CTF: QR/Barcode Decoding Techniques and Common Challenge Patterns

zbarimg in CTF: QR/Barcode Decoding Techniques and Common Challenge Patterns

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3 min read
pdfdumper in CTF: Extracting PDF Content and Common Challenge Patterns

pdfdumper in CTF: Extracting PDF Content and Common Challenge Patterns

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10 min read
dd in CTF: Disk Imaging, Extraction, and Common Challenge Patterns

dd in CTF: Disk Imaging, Extraction, and Common Challenge Patterns

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10 min read
Audacity CTF: Audio Forensics

Audacity CTF: Audio Forensics

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11 min read
FFmpeg for CTF Forensics

FFmpeg for CTF Forensics

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11 min read
Mini RSA picoCTF Writeup

Mini RSA picoCTF Writeup

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9 min read
Analyzing ZIP Encryption: When to Act

Analyzing ZIP Encryption: When to Act

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111 min read
DISKO 1 picoCTF Writeup

DISKO 1 picoCTF Writeup

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6 min read
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