September 2025

Zero Trust Security Model for AWS Infrastructure: Complete Implementation Guide

TL;DR / Key Takeaways Introduction Zero Trust security represents a fundamental shift from traditional perimeter-based security to a model where trust is never assumed and every request must be verified. In AWS environments, implementing Zero Trust requires orchestrating multiple services across identity, network, data, and monitoring layers to create a comprehensive security posture. This guide […]

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Objects and Classes: Identity, Equality, and State

TL;DR / Key Takeaways Introduction Object‑oriented programming starts with clear mental models: what an object represents, how we compare it, and how its state evolves. We’ll establish practical distinctions—identity vs equality, value vs reference semantics—and show runnable examples and class diagrams you can adapt. Related reads: Principles & Practices (SOLID, SoC), Modeling & UML basics.

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Complexity Analysis: Big‑O, Recurrences, and the Master Theorem

TL;DR / Key Takeaways Introduction Complexity analysis predicts how algorithms scale. We’ll build intuition by counting operations, contrasting growth rates, and solving common recurrences with runnable helpers. Related reads: Sorting & Searching; Recursion & Backtracking; Divide & Conquer patterns. Background Deep Dive Counting Operations (illustrative) Compare Growth Curves Master Theorem Helper + Examples We analyze

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