Kirill Abrams's personal blog

Founder & CEO, UmbrellaX TOO

This is where I write about end-to-end encryption, post-quantum cryptography, jurisdictional risk, and the design decisions behind UmbrellaX. Personal opinions, not press releases.

More about me .com

Threat Models briefings

I collect UmbrellaX analysis on threat models here, with source-backed context and links to the most useful related articles.

Passport, client documents, phone, and headphones on a dark desk for secure lawyer-client messaging.

Explainers

Secure messaging for lawyers: client privacy

A founder's guide to secure messaging for lawyers: client confidentiality, metadata, phone numbers, matter teams, and UmbrellaX design.

Jun 11 guide 5 min New

Encrypted protest coordination map with organizer nodes, safe routes, and minimized metadata.

Explainers

Secure messaging for activists: field guide

A founder's guide to secure messaging for activists: protest group risk, metadata, phone numbers, device seizure, shutdowns, and UmbrellaX design.

Jun 4 guide 5 min New

Secure source conversation diagram with a journalist, source, and minimized metadata path.

Explainers

Secure messaging for journalists

A founder's guide to secure messaging for journalists: source contact, metadata, phone numbers, device risk, and how UmbrellaX thinks about it.

Jun 2 guide 5 min New