A parallel mailer that uses your default e-mail client. You may use PostCryptum as soon as it's installed on your computer and you'll see it has never been as easy to secure your e-mails. PostCryptum uses a strong algorithm and an encryptionpass phrase. Select files and they will be encrypted and sent as attached files. Your recipient needs to know your pass phrase to decrypt the files you've sent him (and to have PostCryptum installed on his computer). PostCryptum has two e-mail bodies, an encrypted body and a non-encrypted body, so that you may let your recipients guess the pass phrase tounlock the files attached. For example, in the non-encrypted body, you could write 'What's my favourite meal ? ' so that only your recipient knows the answer.