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Make a deal with The Mathematics of Secrets
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Followers
259
Account age
3 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🧰 Free analysis for The Mathematics of Secrets
Known for
📊 Post engagement
2
Avg engagement / post
0.8%
Engagement vs followers
Nov 2022
On Mastodon since
🔥 Top post: Good summary of where we are on signatures using post-quantum #c · 5 likes + reposts
📊 Activity & format
Posting cadence
1.1 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly text
Recent: 11 text · 1 image · 0 video.
Follower / following
0.5×
Follows 524 back. A more reciprocal / networked account.
Recent posts
View on Mastodon ↗
This finally got me to go try to understand Merlin-Arthur proofs, which are an important tool in public-key #cryptography (The first trick is to remember the difference between Merlin-Arthur and Arthur-Merlin!) @QuantaMagazine
https:/…
I think I mentioned earlier that my next book is going to be on the mathematics of light and sound. As a preview, here are some interesting new discoveries in how the eye sees #color from @scimag ! https://www.science.org/content/podcast/…
Okay, this makes slightly more sense than the last article about removing complex numbers from #quantum physics. Still not convinced the new version is necessary, but at least there's a physical motivation. @apsphysics https://physics.ap…
One more time --- strong #cryptography doesn't help if you don't use it properly! @securityaffairs https://securityaffairs.com/193224/hacking/claude-opus-found-a-four-year-old-hole-in-zcashs-privacy-layer-nobody-knows-if-someone-already-…
Does everyone's eye go immediately to the LateX error here, or am I an extra-big nerd?
Still cleaning up the backlog ... this report from @Wired is kind of scary. Remember, #cryptography doesn't work if you don't use it properly! (Or at all.) https://www.wired.com/story/satellites-are-leaking-the-worlds-secrets-calls-text…
Pretty sure I posted about Part I of this excellent #cryptography explainer from @matthew_d_green Thought I should follow up --- plus, a great blast from the past cover image! https://blog.cryptographyengineering.com/2026/04/17/anonymou…
Catching up on old #quantum #cryptography news from @QuantaMagazine ! https://www.quantamagazine.org/quantum-cryptography-pioneers-win-turing-award-20260318/
This article from @QuantaMagazine is really interesting from a theoretical #cryptography point of view, although practically speaking, it's probably unnecessary.
https://www.quantamagazine.org/how-unknowable-math-can-help-hide-secrets-2…
RE: https://abyssdomain.expert/@filippo/116437975146045205
Definitely worth considering this perspective on #cryptography ! Of course, increasing symmetric key sizes is not nearly as hard as upgrading public key algorithms anyway.
@princetonupress has my #cryptography book on sale for $9.48/£8.00! (Can't seem to get them to tell me Euros, sorry. 😢) https://press.princeton.edu/books/paperback/9780691183312/the-mathematics-of-secrets
Does everyone's eye go immediately to the LateX error here, or am I an extra-big nerd?
Still cleaning up the backlog ... this report from @Wired is kind of scary. Remember, #cryptography doesn't work if you don't use it properly! (Or at all.) https://www.wired.com/story/satellites-are-leaking-the-worlds-secrets-calls-text…
Pretty sure I posted about Part I of this excellent #cryptography explainer from @matthew_d_green Thought I should follow up --- plus, a great blast from the past cover image! https://blog.cryptographyengineering.com/2026/04/17/anonymou…
Catching up on old #quantum #cryptography news from @QuantaMagazine ! https://www.quantamagazine.org/quantum-cryptography-pioneers-win-turing-award-20260318/
This article from @QuantaMagazine is really interesting from a theoretical #cryptography point of view, although practically speaking, it's probably unnecessary.
https://www.quantamagazine.org/how-unknowable-math-can-help-hide-secrets-2…
RE: https://abyssdomain.expert/@filippo/116437975146045205
Definitely worth considering this perspective on #cryptography ! Of course, increasing symmetric key sizes is not nearly as hard as upgrading public key algorithms anyway.
@princetonupress has my #cryptography book on sale for $9.48/£8.00! (Can't seem to get them to tell me Euros, sorry. 😢) https://press.princeton.edu/books/paperback/9780691183312/the-mathematics-of-secrets
🐘 Community & instance
Home server
mathstodon.xyz
Their home server on the fediverse — the instance a creator picks signals the community they belong to.
On Mastodon since
Nov 2022
Joined in the Twitter-exodus wave of late 2022 — part of the migration that made Mastodon a real destination.
💡 Facts
🗓️Joined Mastodon in 2022 — 3 years ago.
👁️Averages 2 views per post.
📤Posts about 1.1× per week.
🕵️ Fake follower check
Estimated66/100
Good
Credibility score
89%
Real
Real audience
Low
Fake-follower risk
High
Data confidence
- Est. 89% real, active audience · Low fake-follower risk.
- Engagement (~0.8% of followers engage each post) is around typical for Mastodon.
- Established account (3+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
About
Hi, I'm Josh Holden. I teach math, write books, and encrypt secret messages. Participant in #fedi22.
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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