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Encryption Explained: From AES to Post-Quantum Cryptography and End-to-End Messaging
Cybersecurity

Encryption Explained: From AES to Post-Quantum Cryptography and End-to-End Messaging

A practical guide to how encryption protects real applications — symmetric ciphers, public-key cryptography, elliptic curves, digital signatures, the quantum computing threat, and why end-to-end encryption in messengers like Instagram matters more than ever.

March 15, 2026
Ilya NixanIlya Nixan
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Why 0.1 + 0.2 ≠ 0.3 and What It Means for Your Money
Software Engineering

Why 0.1 + 0.2 ≠ 0.3 and What It Means for Your Money

How IEEE 754 stores fractional numbers, why double should never be used for financial calculations, and which approaches solve the problem — from minor units to BigDecimal.

March 14, 2026
Ilya NixanIlya Nixan
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DevOps

HTTPS Made Simple: Getting a Free SSL Certificate

Why do you need HTTPS? What is a certificate authority? What types of certificates exist and how do you get one? Setting up nginx with Let's Encrypt.

July 21, 2021
Ilya NixanIlya Nixan
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Software Engineering

Databases and Indexes Explained Simply

How databases work under the hood, why indexes matter, and how it all fits together.

May 29, 2021
Ilya NixanIlya Nixan
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