207 posts analyzed Updated Jul 2026
Averages 7 posts/day, top 25% activity. Most active Fridays around 2 PM UTC. Mostly text posts (66%).
r/cryptography Traffic & Engagement r/cryptography Traffic & Engagement
Volume and engagement over time Posting volume and engagement over time
Post Format
Upvote Distribution
How upvoted posts perform Only posts with 2+ upvotes. The bands below show how those posts are spread by upvote count.
r/cryptography Most Active Times When r/cryptography Is Most Active
Peak posting by day and hour (UTC) When this community posts most, by day and hour (UTC)
Most Active by Day
r/cryptography Flair Performance r/cryptography Flair Performance
Upvotes and volume by flair Average upvotes and post volume by flair
This subreddit doesn't use post flairs.
No flaired posts were found in this month's data.
Post Type Breakdown
Share by text, image, or link Share of posts by format: text, image, or link
r/cryptography Trending Keywords Trending Keywords in r/cryptography
Ranked by how often they appear Title keywords ranked by how often they appear
| Keyword | Mentions ▼ | Upvotes | Comments |
|---|---|---|---|
| quantum | 17 (8.2%) | 5 | 5 |
| cryptography | 16 (7.7%) | 15 | 6 |
| key | 14 (6.8%) | 3 | 8 |
| encryption | 14 (6.8%) | 0 | 5 |
| cipher | 11 (5.3%) | 1 | 3 |
| crypto | 10 (4.8%) | 2 | 3 |
| secure | 10 (4.8%) | 1 | 4 |
| using | 10 (4.8%) | 3 | 7 |
r/cryptography Mentioned Domains Mentioned Domains in r/cryptography
Most linked sites Most linked sites in this subreddit
| Domain | Links | Upvotes |
|---|---|---|
| github.com | 8 | 1 |
| leetarxiv.substack.com | 6 | 2 |
| secchats.com | 4 | 1 |
| youtube.com | 3 | 5 |
r/cryptography Top Posts Top Performing Posts in r/cryptography
Highest-performing posts Highest-performing posts. Each title links to Reddit.
The Joy of Cryptography is now available for free online
I built a USB drive that hides its encrypted storage until it’s secretly unlocked
Flowchart of the Linux RNG
Quantum Computers Are Not a Threat to 128-bit Symmetric Keys
How to actually get started in Post-Quantum Cryptography (PQC)? (Roadmap + Careers + Certs advice needed)
"We just saw this one massive exposure": How Signal and Cloudflare migrated to post-quantum cryptography
Cryptographically seal a message for a set period of time?
Hopeless? Recover zip file encrypted with RSA years ago.
Isogeny Based Cryptography
Using RSA as key exchange instead of Diffie-Hellman key exchange
| Title | Upvotes | Comments | Type | Date |
|---|---|---|---|---|
| The Joy of Cryptography is now available for free online | 124 | 17 | link | Jul 6 |
| I built a USB drive that hides its encrypted storage until it’s secretly unlocked | 49 | 33 | link | Jul 8 |
| Flowchart of the Linux RNG | 34 | 3 | image | Jul 29 |
| Quantum Computers Are Not a Threat to 128-bit Symmetric Keys | 24 | 14 | link | Jul 25 |
| How to actually get started in Post-Quantum Cryptography (PQC)? (Roadmap + Careers + Certs advice needed) | 23 | 8 | text | Jul 26 |
| "We just saw this one massive exposure": How Signal and Cloudflare migrated to post-quantum cryptography | 22 | 0 | link | Jul 1 |
| Cryptographically seal a message for a set period of time? | 18 | 55 | text | Jul 20 |
| Hopeless? Recover zip file encrypted with RSA years ago. | 15 | 26 | text | Jul 14 |
| Isogeny Based Cryptography | 15 | 2 | link | Jul 16 |
| Using RSA as key exchange instead of Diffie-Hellman key exchange | 13 | 18 | text | Jul 13 |
r/cryptography Audience Overlap r/cryptography Subreddit Overlap & Related Communities
Overlapping audiences Communities with overlapping audiences
r/cryptography FAQ Frequently Asked Questions About r/cryptography
What's the best time to post on r/cryptography?
Based on posting volume, r/cryptography is most active on Fridays around 2 PM UTC. That window has the most community activity, but busier hours also mean more competition for attention.
How active is r/cryptography?
r/cryptography averages 7 posts per day and ranks in the top 25% for activity among tracked SFW subreddits.
How many upvotes do posts on r/cryptography get?
Posts on r/cryptography average about 3 upvotes this month (net score per post).
What kind of posts does r/cryptography get most?
On r/cryptography, most posts are text posts (66%)