Sagi Kedmi - שגיא קדמי

Hey, I'm Sagi.

I am a founder at OpenSay, advisory board at several startups and a family man.

I also run Indie TLV - a community of bootstrappers.

Feel free to connect on X, LinkedIn and Github, and reach out via email at

$ echo "c2FnaUBzYWdpLmlvCg==" | base64 -d

20 Mar 2025|4 min read|#privacy#thoughts

How OSINT exploits password recovery flows to expose your digital identity

21 Jul 2022|2 min read|#slack#cloudflare

Supercharge your Slack app with Cloudflare's edge

Party like it's 1983

29 Jul 2017|19 min read|#algo

A rusty engineer's take on a potent data structure

13 Sept 2016|5 min read|#android#kernel#vuln

Write what where

26 May 2016|3 min read|#letsencrypt#life

Took a week off, jumped to SF to work on Let's Encrypt with the EFF!

5 May 2016|5 min read|#android#kernel#vuln

"From Zero to One"

18 Apr 2016|7 min read|#crypto#algo

When simple math pwns fancy crypto

5 Nov 2014|1 min read|#bitcoin#crypto

The lies of Mt. Gox

20 Oct 2014|1 min read|#android#kernel#vuln

Daunting baptism of fire & Meeting the S in RSA