> For the complete documentation index, see [llms.txt](https://docs.envector.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.envector.io/1.4.x/core-concepts/e2e.md).

# End-to-end Encryption

End-to-end (E2E) encryption ensures that only the client can decrypt sensitive data. The server evaluates encrypted computations without seeing plaintext vectors, queries, or scores.

## Key Roles

* Secret Key: Held by the client; never sent to the server.
* Public/Evaluation Keys: Shared with the server to enable encrypted computation.

## Data Insert

<figure><picture><source srcset="/files/G3pGeGQlgpS21LuVnSQF" media="(prefers-color-scheme: dark)"><img src="/files/NGVXXOwOUMJ8KmZe46zq" alt="E2E Data Insert"></picture><figcaption></figcaption></figure>

## Encrypted Search

<figure><picture><source srcset="/files/d8iym4usJ5mJ0EZWTRCP" media="(prefers-color-scheme: dark)"><img src="/files/A8brlYVjfTDDJyhBQFhI" alt="E2E Encrypted Search"></picture><figcaption></figcaption></figure>

## Guarantees

* Server never needs the client’s secret key.
* Index data remains encrypted at rest and during computation.
* Currently, the system places the highest priority on protecting the DB itself, so only plaintext queries are supported.


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