Edit a Credential

Documentation Index

Fetch the complete documentation index at: https://docs.zerokeyusb.com/llms.txt

Use this file to discover all available pages before exploring further.

This guide details every operation in the on-device editor. If you just want to create your first credential, start with the Create your first credential guide.

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Step 1 — Select the credential

From the main screen, navigate to the credential you want to edit using Left/Right. If you have many, hold Left/Right to jump 10 slots at a time. When the right credential is on screen (you’ll see its number at the top left — here 4), move on to the next step.

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Step 2 — Select the field and open the editor

The active field shows as an inverted white block on the left (globe = site, silhouette = user, padlock = password, key = 2FA). Switch between fields with Down/Up:

• Site ↓ User ↓ Pass ↓ 2FA (if the credential has TOTP)

When you’re on the right field, hold Center for ~1 second to enter the editor. A short Center press types the field to the host (not what you want). A long press (~800 ms, until you see the large halo) opens the editor.

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Step 3 — Editor anatomy

The editor looks like this:

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Step 4 — Move the cursor across the keyboard

When you enter the editor, focus starts on KB1 (row 2). Left/Right move the keyboard cursor within the current row. Press Right to advance the keyboard cursor, Left to go back. At the end/start, the cursor jumps to the control in the adjacent row (Rand, Save, <, >).

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Step 5 — Insert a character

With the desired character under the keyboard cursor, press Center. It gets inserted at the field cursor’s current position, which then advances automatically. The L is inserted at position 5 of the field and the field cursor advances to position 6. If you wanted to replace instead of insert, read the next step.

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Step 6 — Move the field cursor (not the keyboard)

Sometimes you want to edit characters in the middle of the field, not just append to the end. For that, use the < and > symbols on row 2. Reach the < or > symbol with Left (from KB1) and press Center. The field cursor moves one position left or right. When it’s on the position you want to edit, go back to KB1/KB2/KB3 and press Center on the new letter — it overwrites the existing one.

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Step 7 — Generate a random password

For password fields, instead of typing letter by letter, use Rand: 12 alphanumeric + symbol characters from the ATECC608A’s hardware TRNG. Navigate to Rand with Down from row 2. Press Center: the field fills up. If you don’t like it, press Center again to regenerate.

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Step 8 — Save

When you’re done, navigate to Save (bottom-left corner) and press Center. The changes are encrypted with AES-128 CBC and written to EEPROM. The editor closes and you return to the main view. The credential now has the changes.

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Shortcut table

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Next steps