Crypto Cheat Sheet Bundle
🔐 The 5 Algorithms Every Backend & Security Interview Asks About
You're about to walk into a placement interview. The interviewer says:
"Walk me through AES."
"Why can't we just SHA-256 the password?"
"When would you use RSA vs Elliptic Curves?"
If your brain blanks — this bundle fixes that. In one weekend.
📦 What you get (29-page PDF bundle)
✅ Cheat Sheet 1 — AES (the algorithm behind WhatsApp, BitLocker, HTTPS)
✅ Cheat Sheet 2 — SHA-256 (Git, Bitcoin, password storage)
✅ Cheat Sheet 3 — HMAC (JWT, webhooks, AWS request signing)
✅ Cheat Sheet 4 — RSA (the classic — and why it's slowly retiring)
✅ Cheat Sheet 5 — Elliptic Curves (Ed25519, X25519 — what TLS 1.3 uses)
🎯 Each sheet includes
• A real diagram of how the algorithm works
• A plain-English analogy (no PhD math required)
• Exact numbers to memorize for the interview
• Production code in Python & Node.js
• Do this ✅ / Don't do this ❌ tables
• The famous breach that destroyed real systems (Sony PS3, LinkedIn, Heartbleed-era CVEs)
• A 60-second interview answer you can memorize WORD FOR WORD
💼 Perfect for
→ Final-year CS / IT students preparing for placements
→ Junior backend devs targeting fintech / cybersecurity roles
→ Anyone applying to Google, Microsoft, Amazon, Goldman, Razorpay, Cred, PhonePe, security-focused startups
→ Bootcamp grads who skipped the math classes
🚀 What you'll be able to do by Monday
• Explain why AES-256-GCM is the right default in any system-design round
• Defend an architecture choice between RSA-3072 and Curve25519
• Spot the 3 patterns that show up in 90% of crypto interview questions
• Stop nodding through code reviews and start actually understanding
📄 Format
One combined 29-page PDF + each cheat sheet as a separate PDF (so you can print/share individually). Print-friendly. Works perfectly on iPad / GoodNotes / Notion.
⚡ Instant download. Read in 45 minutes. Reread before your interview.
⭐ Want guidance on which roles to target after this? Book a 1:1 with me (link in profile).