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Learn how authorization grants or denies user permissions after authentication. Explore roles, permissions, examples, and best-practice tips for secure access control.
System-design
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Learn what encryption is, how it keeps your data safe, and where it's used—from secure websites to online payments. Understand symmetric vs. asymmetric encryption and why it matters for privacy, security, and digital trust.- Published on
Checksums play a key role in data integrity, error detection, secure storage, and password verification. They help detect corrupted data, verify downloads, secure passwords, and prevent duplicates in storage systems.- Published on
A checksum is a fixed-length string from a cryptographic hash that verifies data integrity in distributed systems. It helps detect corruption during data transfer, ensuring clients receive error-free data or can request a clean copy.- Published on
Explore the core components of a Distributed File System (DFS) — replication, scalability, and consistency — and how they contribute to the reliability, performance, and integrity of distributed storage solutions.