Tal Be'ery – Medium

Tal Be'ery
in
Zengo Wallet

Bad Randomness: Protecting Against Cryptography’s Perfect Crime

TL;DR: Black Hat Asia invited Zengo’s research team to present research on a critical but often overlooked vulnerability in cryptography…

9 min read21 hours ago

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Bad Randomness: Protecting Against Cryptography’s Perfect Crime

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Tal Be'ery

The Ambassador protocol: Multi-device E2EE with Privacy

TL;DR: In this blog we present the ambassador protocol, our new cryptographic solution to enable End-to-End Encryption (E2EE) in the…

14 min readMar 3, 2024

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The Ambassador protocol: Multi-device E2EE with Privacy

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Tal Be'ery

Unnecessary Evil: Multi-Device Instant Messaging can be private

TL;DR: Contrary to Meta’s WhatsApp claims, it is possible to have an Instant Messaging service with End-to-End Encryption (E2EE) in the…

4 min readJan 21, 2024

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Unnecessary Evil: Multi-Device Instant Messaging can be private

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Tal Be'ery

Hi Meta, WhatsApp with privacy?

TL;DR: Meta’s WhatsApp suffers from a privacy issue that leaks victim devices’ setup information (mobile device + up to 4 linked devices)…

7 min readJan 17, 2024

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3

Hi Meta, WhatsApp with privacy?

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Tal Be'ery
in
Zengo Wallet

Bitcoin is a Dark Forest (too)

TL;DR: Zengo researchers shed light on malicious bots monitoring the Bitcoin blockchain for bad randomness addresses, exploiting them…

6 min readDec 5, 2023

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Bitcoin is a Dark Forest (too)

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3

Tal Be'ery
in
Zengo Wallet

Do you know how keys are made?

TL;DR: While problems with key generation have caused millions of crypto users to lose funds, Zengo wallet’s MPC technology solves the…

11 min readNov 29, 2023

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Do you know how keys are made?

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Tal Be'ery

A short note on AWS KEY ID

As I was playing with AWS authentication and authorization system, I had realized that most of its inner working and data structures are…

3 min readOct 24, 2023

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A short note on AWS KEY ID

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Tal Be'ery
in
Zengo Wallet

Vires in Numeris: Why adding more parties boosts security

Who can you really trust? This is the critical question to be asked. This question applies to most fields of life and especially to crypto…

7 min readJun 24, 2023

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Vires in Numeris: Why adding more parties boosts security

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Tal Be'ery
in
Zengo Wallet

Firmware Wallets: Sunlight is the best disinfectant

On Tuesday, May 16th, 2023, The Internet discovered that Ledger’s latest firmware update contained a “recovery” feature that allows a…

5 min readMay 17, 2023

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Firmware Wallets: Sunlight is the best disinfectant

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Tal Be'ery
in
Zengo Wallet

WAGMI: I’m optimistic about Web3 because of its security

Yes, I know it sounds absurd. After all, Web3 security is currently one of most ridiculed aspects in the tech landscape, largely supported…

6 min readMar 14, 2022

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WAGMI: I’m optimistic about Web3 because of its security

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Tal Be'ery

Tal Be'ery

All things CyberSecurity. Security Research Manager. Co-Founder @ZenGo (KZen). Formerly, VP of Research @ Aorato acquired by @Microsoft ( MicrosoftATA)

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