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Boris Reitman
Boris Reitman

193 Followers

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Published in

InfoSec Write-ups

·Sep 11

Simple End-to-End Encryption

Until WhatsApp had incorporated the Signal protocol, wide scale adoption of end-to-end encryption was nil. Yet, WhatsApp left the burden of authentication on the unsuspecting users (link). A new end-to-end encryption mobile app Crosspass incorporates authentication in a natural flow, such that it is always performed by users. Crosspass positions…

Encryption

2 min read

Simple End-to-End Encryption
Simple End-to-End Encryption
Encryption

2 min read


Jan 14, 2022

Seasteading is Defenseless

The term seasteading is the analog of homesteading for the oceans: the idea that houses can be built in the open seas. The only “game in town,” it seems, is the Seasteading Institute which aims to create the tools to form new countries on the ocean. Along with innovative technological…

Seasteading

3 min read

Seasteading

3 min read


Nov 30, 2021

Composing a Tune

Over the years I came up with several melodies and recorded them in audio on my iPhone. It was easy to stumble upon a melody while improvising, but it was another matter to turn it into a complete tune. Trying out different variations, I have accumulated an unmanageable amount of…

Composing Music

4 min read

Composing Music

4 min read


Published in

Cantor’s Paradise

·Aug 1, 2021

Triangular Numbers

Today I gave a math lesson to my five-year-old son and stumbled upon a mathematical property that I did not know of. It turns out that any square number is a sum of two triangular numbers. …

Math

5 min read

Triangular Numbers
Triangular Numbers
Math

5 min read


Published in

Cantor’s Paradise

·Jul 8, 2021

Problems with Ancient Musical Scales

One-sentence summary: I explain why an exponential scale was invented, and how it compares with the older scales based on ratios of integers. — It is the continuation of the article on the mathematical nature of musical scales. In that article, we have used ratios to come up with a division of an octave. …

Music Theory

20 min read

Problems with Ancient Musical Scales
Problems with Ancient Musical Scales
Music Theory

20 min read


Published in

ExCommunications

·Jun 26, 2021

Rejecting the Pascal’s Wager

Here is the story of how I became an atheist and stopped fearing God. My transformation occurred through exposure to three philosophical ideas over several years. The first idea was that I could rely on my mind rather than on a say-so of experts. The second idea was that arbitrary…

Atheism

8 min read

Rejecting the Pascal’s Wager
Rejecting the Pascal’s Wager
Atheism

8 min read


Published in

atheism101

·May 15, 2021

The Shortcomings of “Raised by Wolves”

Raised by Wolves is a science fiction TV series directed by Ridley Scott, the same man who directed Blade Runner. The setting is a devastating war between Mythraics versus atheists. …

Atheism

5 min read

Atheism

5 min read


Published in

InfoSec Write-ups

·May 12, 2021

Towards Shorter Encryption Keys

This article goes into technical details concerning Elliptic Curve encryption. Public and private key cryptography is a recent invention from the late seventies that did not occur to our creative predecessors. Instead, they relied on symmetric encryption schemes which requires both sides to know the encryption key. The earliest of…

Security

11 min read

Security

11 min read


Published in

AWS in Plain English

·May 12, 2021

AWS Site-to-Site VPN with NAT

At my company, we use the Amazon Web Services (AWS) infrastructure. We help organizations improve the efficiency of parking lots, and to do that we need to communicate with their computing systems. However, these organizations, which include hospitals and universities, often run closed private networks. …

AWS

10 min read

AWS Site-to-Site VPN with NAT
AWS Site-to-Site VPN with NAT
AWS

10 min read


Published in

atheism101

·May 12, 2021

Religion as a Ponzi Scheme

Religion is a Ponzi scheme, whose currency is faith. And, I am not talking about money. Although money is a key factor driving religion, I want to focus on faith alone. There are two levels to my claim. The first level is individual. The longer a person stays within the…

Religion

3 min read

Religion as a Ponzi Scheme
Religion as a Ponzi Scheme
Religion

3 min read

Boris Reitman

Boris Reitman

193 Followers

The course of history is determined by the spreading of ideas. I’m spreading the good ones.

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