THE JOURNAL

Thinking in code.
Writing about life.

Backend systems, small discoveries, and the human side of being an engineer. Notes from what I build and what I learn along the way.

THE LATEST ENTRY

Personal

Chelsea, Two Enzos, and a Promise Kept

My take on Enzo Fernandez joining Maresca at City, the failed deadline day deals, and Chelsea keeping their word at a cost.

Beyond the code

Personal·17 min read

At the whiteboard

Algorithms·5 min read

THE COLLECTION

A working notebook.
An occasional reflection.

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65 articles in the journal

September 22, 202612:39 AM6 min read

Personal

My take on Enzo Fernandez joining Maresca at City, the failed deadline day deals, and Chelsea keeping their word at a cost.

September 9, 20262:00 AM7 min read

Cryptography

Calculate age passphrase attack times, understand the assumptions, and see why random selection matters more than password length alone.

September 7, 20261:30 AM4 min read

Cryptography

Compare a passphrase with an age key pair, make your own keys, and encrypt one file for two recipients.

September 5, 20262:05 AM5 min read

Cryptography

Learn how age encrypts file contents, what an authentication tag checks, and what happens when one byte changes.

September 4, 20261:40 AM4 min read

Cryptography

Learn how scrypt derives an age wrapping key, why each attempt uses time and memory, and what a slow calculation cannot prevent.

September 2, 20262:20 AM5 min read

Cryptography

Read an age file header one field at a time, with simple definitions for the salt, encrypted file key, and authentication code.

Showing 1 to 6 of 65 articles

Thanks for spending a little time here.Fajar.