Kirill Abramov'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

Encryption and protocol briefings

I explain the cryptographic choices behind UmbrellaX, including MLS, Signal Protocol trade offs, post-quantum hardening, group key management, and what encryption does not hide.

What I cover

end to end encryption explained
MLS messaging protocol
Signal Protocol vs MLS
encrypted group chat protocol

Abstract blueprint of two cryptographic structures, a chained ratchet on the left and a balanced binary tree on the right, in red and gold on a dark navy background.

Encryption

Signal Protocol vs MLS: the bytes on the wire, the trade offs that matter

Signal Protocol and MLS (RFC 9420) both deliver end to end encryption. They diverge on groups, post quantum, and adoption surface. A builder's comparison from someone who picked MLS.

May 10 analysis 5 min New

Abstract cipher glyphs on a black background, evoking encrypted text.

Encryption

End to end encryption explained: what it is, what it is not, and how UmbrellaX implements it

A byte level explainer of end to end encryption. What E2EE protects, what it does not, which protocols matter in 2026, and how UmbrellaX uses MLS plus post quantum hardening.

Apr 29 pillar 5 min New