Moxie Marlinspike Net Worth: Is He Rich or Poor?

Published on: Jul 8, 2023

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Moxie Marlinspike, real name Matthew Rosenfeld, founded and ran the messaging app Signal. He arrived on August 15, 1990.

A cryptographer and computer security researcher by trade, he is also the CEO of Signal Messenger, which he co-founded.

Moxie Marlinspike completed their senior year of high school with honors. Later, Moxie Marlinspike completed her Bachelor’s degree at a state university in the United States.

Who is Moxie Marlinspike?

American entrepreneur, cryptographer, and researcher in computer security Moxie Marlinspike.

Marlinspike developed SignalSignal, started the Signal Technology Foundation, and led Signal Messenger LLC.

As its first chief executive officer. Signal, WhatsApp, Google Messages, Facebook Messenger, and Skype all employ his co-created encryption protocol, Signal Protocol.

Marlinspike, a former head of Twitter’s security team, has written a proposal to replace SSL called Convergence.

Moxie Marlinspike’s biodata

Full Name	Matthew Rosenfeld (Known as Moxie Marlinspike)
Date of Birth	August 15, 1990
Nationality	American
Profession	Entrepreneur, Cryptographer, Computer Security Researcher
Known For	Creator of Signal, Co-founder of Signal Foundation
Current Position	CEO of Signal Messenger LLC
Education	Information not publicly available

Please note that this information is based on what is publicly available and might not be fully up-to-date. Details about his parents, relationship status, net worth, and other personal details are not publicly known.

Moxie Marlinspike Career

Earlier in his career, Marlinspike worked for several IT firms, including BEA Systems Inc., a software developer for business IT infrastructure.

Marlinspike co-founded the enterprise mobile security startup Whisper Systems in 2010 and was its chief technical officer.

Whisper Systems unveiled TextSecure and RedPhone products in May 2010.

These programs allowed for secure text and phone calls from start to finish using encryption protocols.

For an undisclosed sum, Twitter purchased the firm in late 2011. Getting Mr. Marlinspike on board “primarily so that he could help the then-startup improve its security” was the driving force behind the purchase.

While he was in charge of security at Twitter, the company released all of Whisper Systems’ open-source software.

After leaving Twitter in early 2013, Marlinspike established Open Whisper Systems as a community-driven.

An open-source initiative dedicated to advancing the technologies behind encrypted messaging apps TextSecure and RedPhone.

In February 2014, Marlinspike and Trevor Perrin released the initial version of the Signal Protocol via the TextSecure app.

The SignalSignal results from Open Whisper Systems’ consolidation of TextSecure and RedPhone in November 2015.

Over two years (2014–2016), Marlinspike collaborated with WhatsApp, Facebook, and Google to implement the Signal Protocol within their respective messaging platforms.

Signal Technology Foundation and its subsidiary, Signal Messenger LLC, were unveiled on February 21, 2018, by Marlinspike and WhatsApp co-founder Brian Acton.

Marlinspike was the initial CEO of Signal Messenger and stayed in that role until January 10, 2022.

Marlinspike claims he is denied the ability to print his boarding permit and is subjected to further screening at TSA security checkpoints whenever he flies domestically within the United States.

At first, federal officers stated Marlinspike would only receive his devices returned if he submitted his passwords so that they could decode the material.

They held him for over five hours while he attempted to enter the United States from the Dominican Republic in 2010.

Marlinspike declined, and the gadgets were returned, but he said he couldn’t trust them because “they could have modified the hardware or installed new keyboard firmware.”

Moxie Marlinspike’s research work

Marlinspike first described SSL stripping in a 2009 paper; it is a type of man-in-the-middle assault.

In which an attacker on a network prevents a web browser from using an encrypted connection.

And the victim is unlikely to notice. He also declared the availability of sslstrip. An automated tool for making man-in-the-middle attacks for public use.

As a result, the HTTP Strict Transport Security (HSTS) specification was created to thwart such assaults.

Threats in the Implementation of SSL: Marlinspike has uncovered several flaws in widely used SSL implementations.

One of his notable publications is a paper on exploiting SSL/TLS implementations that do not properly check the X.509 v3 “BasicConstraints” extension in public key certificate chains.

This meant that anyone holding a certificate signed by a valid CA for one domain could create certificates for other domains.

That gave the impression that they came from the same CA. Internet Explorer and other Windows applications that used SSL/TLS connections were susceptible to a man-in-the-middle attack.

Since the vulnerable SSL/TLS implementations contained the Microsoft CryptoAPI.

The SSL/TLS implementation on Apple Inc.’s iOS was found to still be vulnerable in 2011.

Marlinspike also introduced a null-prefix attack against SSL certificates in a paper he published in 2009.

He disclosed that all major SSL implementations were vulnerable to a forgery attack because they did not adequately verify the Common Name value of a certificate.

How to fix the CA crisis: At the 2011 Black Hats security conference in Las Vegas, Marlinspike gave a presentation titled “SSL and the Future of Authenticity”.

He described several issues with CAs and announced the launch of a new software project named Convergence to serve as an alternative.

To provide SSL certificate pinning and contribute to a solution for the CA problem, Marlinspike and Perrin.

2012, filed an Internet-Draft for TACK[40] to the Internet Engineering Task Force.

The security of MS-CHAPv2 handshakes was reduced to a single DES encryption thanks to work reported in 2012 by researchers Marlinspike and David Hulton.

Together with his partner, Hulton developed technology that could break the remaining DES encryption within 24 hours.

And they made it available as a free Internet service to anyone who wanted to use it.

Marlinspike stated in 2013 that he received emails from the Saudi Arabian telecom service Mobily asking for his assistance in surveilling their users.

Marlinspike refused to assist and instead released the correspondence to the public. Mobily strongly refuted the claims. “We never communicate with hackers,” the firm emphasized.