Paste a message, a contract, a complaint, and ALIAS swaps the identifying details for placeholders: [PERSON_1], [EMAIL_1], [AMOUNT_2], the same one every time the same value appears. Send the masked version to the assistant, the translator or the contractor, paste the answer back, and the placeholders turn back into the real names. The key never leaves this tab. Included in the Sovereign Pass.
The key exists only in this tab. Download it if you will need to restore a reply later or on another machine, and treat the file as the sensitive one: it is the list of who is who.
It is a reversible substitution. The same value gets the same placeholder throughout, so the assistant can still follow who did what, and the answer maps back cleanly.
It is not anonymisation. A text can identify someone with no name in it: a job title, a street, a sequence of events. Placeholders remove the labels, not the story. Decide what the reader can infer before you send it.
Names are found by shape. Two capitalised words in a row are treated as a name; organisations are found by their suffix (Inc, Ltd, LLC and the like). Lower-case names, single first names and unusual forms are missed unless you list them in the terms box. Ordinary capitalised words at the start of a sentence are filtered but not perfectly.
One placeholder per person. Once a full name has been seen, the first name or surname on its own gets the same placeholder, so the assistant knows they are the same person. When the reply is restored, that placeholder comes back as the full name.
What you send is still what you send. ALIAS makes the text safer to hand over; it does not change the terms of whatever service receives it.
Nothing leaves this tab. The text, the masked version and the key stay in browser memory. Closing the tab discards them unless you downloaded the key.