What caused the sudden spike in failed login attempts for 1Password's browser extension last week?

Introduction

The sudden spike in failed login attempts for 1Password's browser extension last week is a critical issue that demands immediate attention and thorough analysis. As we delve into this problem, we'll follow a systematic approach to identify, validate, and address the root cause while considering both short-term fixes and long-term implications for our product and users.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be related to a recent update. Has there been any recent changes to the browser extension or the authentication system?

Why it matters: Recent changes often correlate with sudden spikes in issues. Expected answer: Yes, there was a minor update to the extension last week. Impact on approach: If confirmed, we'd focus on the changes made in that update.

• Considering the nature of the issue, I'm wondering about the scale. What percentage increase in failed login attempts are we seeing compared to the baseline?

Why it matters: The magnitude helps prioritize the issue and narrow down potential causes. Expected answer: A 200% increase in failed attempts. Impact on approach: A large increase might indicate a systemic issue rather than user error.

• Given that it's a browser extension, I'm curious about the distribution. Is this spike consistent across all supported browsers or specific to certain ones?

Why it matters: Browser-specific issues could point to compatibility problems. Expected answer: The spike is primarily seen in Chrome and Firefox. Impact on approach: We'd focus on these browsers and their recent updates or changes.

• Thinking about user segments, I'm wondering if this is affecting all users equally. Do we see any patterns in terms of user types (e.g., new vs. long-term users) experiencing these failed logins?

Why it matters: Different patterns across user segments could indicate different root causes. Expected answer: The issue seems to affect long-term users more than new ones. Impact on approach: We'd investigate factors that might specifically impact experienced users.

• Considering the potential for external factors, have there been any reported large-scale internet outages or DDoS attacks during this period?

Why it matters: External factors could explain sudden spikes that aren't directly related to our product. Expected answer: No significant external events have been reported. Impact on approach: We'd focus more on internal factors if external causes are ruled out.