r/crypto is a subreddit with 347k members. The most common kinds of discussions are news and ideas, and the community frequently discusses cryptography, looking for, encryption, crypto, and security, 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?"
4 posts
#4
Solution Requests
: "Where can I share my protocol spec?"
1 post
#5
Self-Promotion
: "(Re) Introducing Stoffel, Your Private by Design Teammate"
1 post
Popular Topics in r/crypto
#1
Cryptography
: "Is lattice Cryptography actually quantum resistant, or just not yet understood?"
22 posts
#2
Looking For
15 posts
#3
Encryption
: "Is lattice cryptography actually quantum resistant, or just not yet understood?"
11 posts
#4
Crypto
11 posts
#5
Security
: "Feisty Duck Cryptography & Security Newsletter 137 (May 2026)"
6 posts
#6
Software
5 posts
#7
Ml Kem
: "Exploiting ML-DSA bugs"
4 posts
#8
Struggling
3 posts
#9
Method
3 posts
#10
Algorithm
: "TW128: A permutation-based AEAD designed for SIMD parallelism"
3 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
pending moderation
: "Is LWE hard because it's "random", or because its structure refuses to become an attack?"
1 post
Member Growth in r/crypto
Yearly
+15k members(4.5%)
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About
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Last updated: September 20, 2026