# The architectural reason 1Password can't read your vault data

DevFeed: [The architectural reason 1Password can't read your vault data](<https://devfeed.tech/articles/the-architectural-reason-1password-can-t-read-your-vault-data-1965.md>)

Original publisher: [Read original article](<https://1password.com/blog/the-architectural-reason-1password-cant-read-your-vault-data>)

Author: info@1password.com (Rick Fillion; Wayne Duso; K.J. Valencik; Daryl Martin)

Published: 2026-05-20T00:00:00Z

Content type: article

Language: en

Sources: [Blog on 1Password Blog](<https://devfeed.tech/sources/blog-on-1password-blog.md>)

Topics: [Architecture & Design](<https://devfeed.tech/topics/architecture-design.md>), [Encryption](<https://devfeed.tech/topics/encryption.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [Security](<https://devfeed.tech/topics/security.md>), [passwords](<https://devfeed.tech/topics/passwords.md>), [data](<https://devfeed.tech/topics/data.md>), [Server](<https://devfeed.tech/topics/server.md>), [QR Code](<https://devfeed.tech/topics/qrcode.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [building-1password](<https://devfeed.tech/tags/building-1password.md>), [cryptographic](<https://devfeed.tech/tags/cryptographic.md>), [data](<https://devfeed.tech/tags/data.md>), [encryption](<https://devfeed.tech/tags/encryption.md>), [post](<https://devfeed.tech/tags/post.md>), [product](<https://devfeed.tech/tags/product.md>), [security](<https://devfeed.tech/tags/security.md>), [servers](<https://devfeed.tech/tags/servers.md>)

## AI overview

The article explains that 1Password cannot technically decrypt or read users' vault data. Vault items are encrypted locally before leaving the device, while the Secret Key and account password remain on users' devices and are never transmitted to or stored on 1Password's servers.

## Source excerpt

There's a question we get asked constantly, and it's the right one to ask: "Can 1Password see the contents of my vault?" The answer is no, and it's because of how we built the product, not just a promise we're making. That's an important distinction, because "we promise" has never been an acceptable answer in this industry. After all, promises get broken, and companies get compromised, acquired, and are under constant attack from threat actors. 1Password's commitment to our security principles is genuine, but what matters more is how we've built that commitment into our product and architecture, and the transparency we back it up with with our security white paper. So here's the precise answer: The way 1Password is built means that we are incapable, on a technical level, of decrypting and reading your vault contents. We're not policy-prevented or contractually restricted; we are technically incapable. This post explains what that means, why we built it this way, and what the real tradeoffs are. Your data is encrypted before it ever leaves your device When you save a password, a credit card number, or a note in 1Password, the first thing that happens is encryption, and it happens on your device, before any data moves anywhere. Encryption here doesn't mean we "hide" or "scramble" your data and promise not to look. It means your plaintext vault item is transformed into ciphertext using cryptographic keys that are only available on your devices. Without these keys, 1Password is unable to decrypt and read your data. The two keys in question are your 128 bit Secret Key (a 34-character value separated by dashes) and your account password. Together, these produce the cryptographic key that locks and unlocks your vault. Here's the critical part: neither your Secret Key nor your account password is ever transmitted to 1Password or stored on our servers. We never possess the keys needed to decrypt your vaults. When you set up your 1Password account on a new device, you're not