About

In an era of pervasive digital surveillance, standard email protocols (SMTP/IMAP) often transmit data in plain text or effectively retrievable formats across intermediate servers. This Email Encryption Tool creates a zero-knowledge environment where your sensitive data is obfuscated using AES-256-GCM (Advanced Encryption Standard in Galois/Counter Mode) before it ever leaves your browser.

Unlike server-side solutions, this architecture ensures that NULL data is transmitted to us. The encryption key is derived locally from your password using PBKDF2 with high iteration counts, rendering brute-force attacks computationally expensive. This tool is essential for IT professionals, whistleblowers, and privacy-conscious individuals sharing passwords, API keys, or confidential correspondence.

Formulas

The core encryption mechanism relies on the transformation of Plaintext (P) into Ciphertext (C) using a symmetric key (K) and an Initialization Vector (IV).

{

K ← PBKDF2(password, salt, iterations)C = AES-GCM(P, K, IV)

To ensure integrity and authenticity, the process utilizes a Message Authentication Code (TAG), appended to the output:

Output = salt || IV || C || TAG

Where:

K = 256-bit Derived Key

IV = 96-bit Random Initialization Vector (ensures uniqueness)

|| = Concatenation

Reference Data

Protocol / Standard	Key Length (bits)	Security Level	Typical Use Case
AES-GCM	256	Military / Top Secret	Real-time encryption, secure communications (This Tool)
RSA	2048+	High	Key exchange, digital signatures, SSL/TLS certificates
ChaCha20	256	High	Mobile devices, high-performance stream encryption
DES	56	Obsolete	Legacy systems (Broken, highly insecure)
3DES	112/168	Low/Medium	Legacy banking (Phasing out)
PBKDF2	N/A (Hashing)	High (w/ Salt)	Password key derivation, slowing down GPU cracking

Frequently Asked Questions

Yes. This tool uses the Web Crypto API, a native browser standard. No data is sent to any server. You can verify this by inspecting the network tab in your browser's developer tools or disconnecting from the internet while using the tool.

The expiration timestamp is embedded directly into the encrypted payload. During decryption, the tool checks the embedded timestamp against your device's current time. If the current time exceeds the expiry time, the JavaScript logic refuses to display the content.

Your data is permanently lost. Because we use AES-256 (a military-grade standard), there are no "backdoors" or administrative overrides. Mathematics makes no exceptions.

This is due to the "IV" (Initialization Vector) and "Salt". Even if the password and message are identical, we generate random noise for every encryption event. This prevents "replay attacks" and ensures that patterns in your messages cannot be analyzed by attackers.