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

Cryptography

[Crypto: age] How Long Does a Passphrase Attack Take?

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

Beyond the code

Personal·17 min read

At the whiteboard

Algorithms·5 min read

THE COLLECTION

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An occasional reflection.

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64 articles in the journal

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.

September 1, 20261:15 AM4 min read

Cryptography

A first file encryption example with age, from readable text to an encrypted file and back, with instructions for each command.

Showing 1 to 6 of 64 articles

Thanks for spending a little time here.Fajar.