r/crypto is a subreddit with 348k members. The most common kinds of discussions are news and ideas, and the community frequently discusses cryptography, looking for, crypto, encryption, and software, and they frequently recommend/review text editor.
Cryptography is the art of creating mathematical assurances for who can do what with data, including but not limited to encryption of messages such that only the key-holder can read it. Cryptography lives at an intersection of math and computer science.
This is a technical subreddit covering the theory and practice of modern and *strong* cryptography.
Popular Themes in r/crypto
#1
News
: "Signal: Introducing Automatic Key Verification"
13 posts
#2
Ideas
: "Base84 deserves a place in file names"
6 posts
#3
Advice Requests
: "What is your favorite cryptography library and why?"
5 posts
#4
Solution Requests
: "Where can I share my protocol spec?"
2 posts
#5
Self-Promotion
: "(Re) Introducing Stoffel, Your Private by Design Teammate"
1 post
Popular Topics in r/crypto
#1
Cryptography
: "What is your favorite Cryptography library and why?"
19 posts
#2
Looking For
15 posts
#3
Crypto
11 posts
#4
Encryption
: ""Encrypted spaces" - Microsoft Research"
8 posts
#5
Software
5 posts
#6
Method
3 posts
#7
Algorithm
: "TW128: A permutation-based AEAD designed for SIMD parallelism"
3 posts
#8
Security
: "One Step Ahead - Security app - White Paper"
3 posts
#9
Cr.yp.to
: "Cr.yp.to: 2026.06.30: Understanding lattice risks"
3 posts
#10
Library
: "What are the state of the art FHE libraries for ML/AI in 2026?"
2 posts
Products Discussed in r/crypto
Text Editor
2 reviews
#1
Overleaf
5.0★ from 1 review
#2
LyX
4.0★ from 1 review
Flair Used in r/crypto
#1
Document file
: "The ePrint:2026/1591 Quantum Algorithm Does Not Solve DCP"
3 posts
#2
Meta
: "Leiden Declaration on Artificial Intelligence and Mathematics"
1 post
#3
Flagged submission
: "TLS is 65% post-quantum now and it's the least important thing we could have fixed"
1 post
Member Growth in r/crypto
Yearly
+14k members(4.3%)
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About
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Last updated: October 1, 2026