Prabhat Tiwari Precise work, kept behind a quiet door.

Vault 004 — Keypad

The Vault

Everything I build, behind one door. Four digits open it.

Need the code? Read this week’s riddle

It’s open.

See the collection
PT · VAULT 004
···· ENTER CODE

Welcome to the Vault

Where careful engineering meets a curious mind.

This is where I keep the work: six products and a growing run of sites, each one built by hand and shipped in public. The door is a small game. Solve the riddle, key in the code, and the whole collection swings open.

How it works

Why a door?

Because finding something feels better than being handed it. A lock costs you ten seconds, and those ten seconds make you look closer at what’s inside.

Nothing here is truly hidden. The code is easy to find, and every locker opens straight onto a live site.

  1. 1

    One riddle

    A short riddle sits below. Its answer is always a four-digit number.

  2. 2

    Four digits

    Key the answer in on the pad, or type it on your keyboard, then press Open.

  3. 3

    Stuck?

    Take the hint. If that still fails, the riddle card will simply tell you.

This week’s riddle No. 43

I sit at the foot of this page, I changed on the first of January, and I’m the only four digits this lock will take.

Behind the door

The Collection

Six products and five series. Every locker opens a live site.

Locked. Key in the code and every locker opens.

Back to the keypad

IProducts

IISeries