Lab Notes: 2025-11-16

Overview

Mixed day of cryptography, sysadmin tasks, and workflow adjustments. Continued practicing Diffie-Hellman, RSA, and modular arithmetic. Troubleshot macOS Dock behavior, learned command-line editing workflows, and prepared lab notes for posting.

Cybersecurity Topics Covered

• More Diffie-Hellman key exchange practice.
• Clarified creation of Alice’s public key A = g^a mod p.
• Practiced modular math for both DH and RSA.
• Understood exponent formatting in Markdown for blog posts.
• Practiced hashing and encoding knowledge.
• Reviewed factoring and prime identification (RSA foundations).

Sysadmin Topics Covered

• Attempted to hide Finder and Trash icons from macOS Dock (not natively possible).
• Time zone conversions (CST↔PST for meetings).
• Git workflow for lab note publishing.

Commands & Steps Practiced

# macOS Vim operations
yy      # yank line
dd      # delete line
p       # paste line

Notes

• Strengthened understanding of modulo meaning through repeated child-level breakdowns.
• Practiced Markdown math formatting for exponents in cybersecurity content.
• Resolved confusion around division symbol on macOS keyboard.