Select Key Size
& Enter Passphrase

Generate RSA
Key Pair
(Private & Public)

Keys Directory
📄 company_private_N.pem
(Encrypted)
📄 company_public_N.pem

Select File,
Public Key &
Output Folder

Generate Random
AES Key & Nonce

Encrypt AES Key
with Public Key
(RSA-OAEP)

Create Metadata
(Name, Time, Size)

Encrypt File
Content with AES
Key (AES-GCM)

Package into
Container (.lfenc)

Encrypted File
(.lfenc)

Select Encrypted File
(.lfenc), Private Key,
Output Folder & Enter Passphrase

Read Container
Header

Decrypt AES Key
with Private Key
(RSA-OAEP)

Decrypt File
Content with AES
Key (AES-GCM)

Write Original File
to Output Folder

Log Metadata to CSV

Decrypted File

Logs Directory
📄 decryption_log.csv

Show Error Message

Show Success Message
& Clear Inputs