file sharing for the masses

Quantum resistant encrypted

Encrypted, self-destructing notes and E2EE chat.
One view, then gone. No accounts. No logs.

How it works

01 |

Derive the master key

Your browser uses Argon2id to transform your input into a high-entropy Key Encryption Key (KEK) seed.

Specs: PIM=100, Iterations=4, Memory=64MB, Parallelism=1.

02 |

Generate post-quantum armor

A deterministic ML-KEM-768 keypair is derived from the seed. The Data Encryption Key (DEK) is then securely wrapped via an ML-KEM shared secret, adding a post-quantum KEM layer while password entropy remains critical.

03 |

Seal the payload

The file is locked using AES-256-GCM with a random 256-bit DEK. This ensures both the confidentiality and the integrity of your data before it ever leaves your device.

Install

# From the project root:
cd reiven-cli
npm install
npm link

# Verify command:
reiven --help

Upload

# Upload a file (prompts for password):
reiven put secret.pdf

Password: *********

Access code: *** 80-94-86-60 ***
Download URL: https://reiven.io/download.html?id=b05b053a745aed1dfb
Delete URL: https://reiven.io/delete/b05b053a745aed1dfb/d8b97cbd72640936c9800b3289269f6f7274c7d631d7af6d
Expires at: 2026-02-27T07:02:58.120Z

Download

# Download by access code:
reiven get 80948660

Password: *********

Saved: /Users/reiven/Documents/secret.pdf