> For the complete documentation index, see [llms.txt](https://docs.the4thpillar.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.the4thpillar.io/dapps-and-clients/encryptor-extension.md).

# Encryptor Extension

The [Encryptor Extension](https://chrome.google.com/webstore/detail/encryptor/feolajpinjjfikmmeknkdjbllbppojij?hl=en) enables E2EE (i.e. end-to-end encryption) by user-owned private keys. The secret key is produced by ECDH (i.e. Elliptic Curve Diffie Hellman) secret key exchange. The sender needs the Wallet Client B (i.e. receiver) public key to be recorded on the blockchain, while the secret key is calculated based on the private and public keys. Natively **AES-256-GCM** (i.e. Advanced Encryption Standard) is used for the email and messaging communication encryption algorithm. The Encryptor extension is open-source, fully self-custodial and enabled by choice.

{% hint style="success" %}
**Explainer:** The safety or security of AES increases with key length. Therefore, AES-256 is considered the safest or most secure AES algorithm because it has the longest key length, making it the most difficult to crack through brute force or cryptographic attacks. AES-256 GCM is among the top choices for secure encryption, offering a robust combination of confidentiality, integrity, and authenticity.
{% endhint %}


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