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r/cryptography

95.3K members. The best post we have captured here reached 489 upvotes, which works out to 5 per 1,000 members.

5peak upvotes per 1,000 members
95.3Kmembers
489best post
147most comments
170posts we track

Open r/cryptography on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

37% 29% 19% 11%
Text 37% Link 29% Question 19% Image 11% Video 3% Gallery 2%

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Are memes allowed here?

↑ 489 💬 9 image 2022

WW2 pigeon carried an encrypted text. Here it is.

↑ 439 💬 147 text 2012

Information and learning resources for cryptography newcomers

↑ 327 💬 85 text 2022

Types of Cryptography

↑ 318 💬 16 image 2020

I thought this might be something you guys would like to see. Grandfather worked at NSA as a code breaker for 30 years

↑ 259 💬 11 image 2019

The more I read about cryptography, the more I think Alice and Bob should just talk in person.

↑ 220 💬 9 text 2017

Interesting gravestone in my local cemetary

↑ 178 💬 40 image 2019

Finally got a copy of my one of my favorite books on the subject

↑ 169 💬 16 image 2023

Navajo Code Talkers disappear from military websites after Trump DEI order

↑ 160 💬 23 link 2025

The Joy of Cryptography is now available for free online

↑ 159 💬 17 link 2026

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

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Every figure here is what ViralHunt has captured from r/cryptography, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.