Life & fun · alternatives · 2026

24 alternatives to Decrypting the Zodiac Z32 triangulates a 100ft triangular crop mark

The 32-character ciphertext ("Z32") mailed by the Zodiac Killer in June 1970 has historically been resistant to standard cryptanalysis due to its low unicity distance. This paper presents a solution derived by reframing the cipher as a Geographic Constraint Satisfaction Problem (GCSP). By re

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Zodiac Crypt▲66
Solve ciphers and create your own cryptograms!
2017 · play.google.com · its alternatives →
2
filippo.io/mlkem768 – Post-Quantum Cryptography for the Go Ecosystem▲315
filippo.io/mlkem768 is a pure-Go implementation of the post-quantum key exchange mechanism ML-KEM-768 optimized for correctness and readability.
2024 · words.filippo.io · its alternatives →
3
Cipher by Byterover▲341
Open-source, shared memory for coding agents
2025 · byterover.dev · its alternatives →
4
Cracking passwords with a simple genetic algorithm▲149
Population based metaheuristic for password cracking. Siga(Simple genetic algorithm) - lyle-nel/siga
2016 · github.com · its alternatives →
5
FractalCrypt 2.0 – free deniable encryption cryptoarchiver▲128
Free cross-platform deniable encryption cryptoarchiver - GitHub - zorggomat/FractalCryptGUI: Free cross-platform deniable encryption cryptoarchiver
2021 · github.com · its alternatives →
6
BFS, Dijkstra and A* interactive demo made in React▲94
Visual explanation of pathfinding algorithms and how a*, Dijkstra and BFS can be seen as the same algorithm with different parameter/data structures used under the hood - npretto/pathfinding
2021 · github.com · its alternatives →
7
C99 implementation of new O(m log^(2/3) n) shortest path algorithm▲111
Experimental C implementation of “Breaking the Sorting Barrier for Directed Single-Source Shortest Paths” by Ran Duan, Jiayi Mao, Xiao Mao, Xinkai Shu, and Longhui Yin (STOC 2025) - danalec/DMMSY-SSSP
Feb 2026 · github.com · its alternatives →
8
Flippy Bit And The Attack Of The Hexadecimals▲78
Bitwise operations and conversions to hexadecimals
2016 · flippybitandtheattackofthehexadecimalsfrombase16.com · its alternatives →
9
CipherPro▲61
Cryptograms to challenge your cipher-solving skills
2018 · play.google.com · its alternatives →
10
zkGolf – Competitive optimization of formally verified circuits▲69
Zero-Knowledge Proofs (ZKPs) let an untrusted proved show that computation was executed correctly without revealing the inputs to the verifier. However to prove anything, the computation first has to be expressed as a circuit: a system of polynomial equations (constraints) over a finite field. Circuits are the assembly language of zk and every constraint costs prover (and sometimes verifier) time, so production circuits are aggressively hand-optimized. Over the last months, we have been experimenting with writing formal specifications instead and letting LLMs produce the circuits: as long as…
Jul 2026 · zk.golf · its alternatives →
11
Ariadne – A Rust implementation of aperiodic cryptography▲40
Hello HN, we're CipherNomad, the research initiative behind this project. The Ariadne Protocol is our exploration of a different cryptographic model. The work began with an observation of primitives like the Lion transform, which use a static, hardcoded sequence of operations. This led us to ask: What if the cryptographic "program" wasn't a constant, but a dynamic, history-dependent variable? Our first step was a "Cryptographic Virtual Machine" that took an explicit list of operations (a "Path"). This worked, but required sharing the Path object—an explicit dependency that needed to be…
2025 · codeberg.org · its alternatives →
12
Differential Fuzzing of Cryptographic Libraries▲84
Cryptofuzz Cryptofuzz is a project that fuzzes cryptographic libraries and compares their output in order to find implementation discrepancies. It’s quite effective and has already found a lo…
2019 · guidovranken.com · its alternatives →
13
AES-256 brute force using structured logic (UUIDs and xy = x/y rule)▲11
I’ve been experimenting with structured logic as a way to frame search spaces — not in an academic way, just as a personal project. I wanted to know: what happens if you initialize a brute-force run with a simple equality like xy = x / y? Not as a filter, just as a logical ignition point. I used AES-256-CBC encrypted files with UUID passwords and tested against a 1 million UUID space. It cracked it in under 40 seconds. Then I scaled it to a 1 billion UUID range, and it still found the key without issue. This isn’t a crypto tool, and I’m not trying to solve any cryptographic problems.…
2025 · github.com · its alternatives →
14
Simple Image encrypt/decrypt using Python▲30
Image AES256 crypt-decrypt . Contribute to s3nh/img-cryptor development by creating an account on GitHub.
2021 · github.com · its alternatives →
15BS
Breaking Substitution Ciphers with Markov Chains▲9
2020 · daniellowengrub.com · its alternatives →
16
PVAC FHE over hypergraphs with LPN security▲5
pvac-hfhe: PoC for publicly verifiable arithmetic computations with hypergraph based homomorphic encryption over Fp (p = 2^127 - 1), omissions for large numbers and excluded the transfer mechanism for data convertation (applies only to the prod version of octra network). c++17 header-only. - GitHub
Dec 2025 · github.com · its alternatives →
17
The Mathematics of Secrets▲3
Cryptography from Caesar Ciphers to Digital Encryption
2017 · amazon.com · its alternatives →
18
A book introducing Geospatial and Rust▲11
My friend and I have been collaborating on this lighthearted introduction to doing geospatial computation in rust. Don't know Rust? Don't know geospatial? I'd be interested to know what you think.
2022 · book.georust.org · its alternatives →
19
Pgsodium – A Crytographic PostgreSQL Extension▲7
Modern cryptography for PostgreSQL using libsodium. - michelp/pgsodium
2022 · github.com · its alternatives →
20EE
Encrypted emails based on Signal protocol with post-quantum algorithms▲10
Hi HN, we have recently completed a research project on how to encrypt emails with post-quantum secure algorithms as well as Forward Secrecy. We'd love to hear your feedback and discuss technical issues. The paper can be found here: https://eprint.iacr.org/2021/875
2021 · its alternatives →
21
Astronomical image processing library rewritten in Rust▲16
Lucky imaging library. Contribute to GreatAttractor/libskry_r development by creating an account on GitHub.
2017 · github.com · its alternatives →
22
CipherStash Stack – Data Level Access Control in TS/JS▲17
Hi HN, I'm Dan Draper, founder of CipherStash. We've spent 5 years building per-value searchable encryption tech. We realized that encryption like this is incredibly powerful but the engineering required is generally not worth the effort. So we built a platform and opensource SDK to take the cry out of cryptography :) CipherStash Stack is: * A searchable encryption SDK for TS and Postgres * Fast, key management with Zerokms (backed by HSM) * A transparent SQL proxy * Auth library and OIDC federation service * Skills for data security Integrations include Prisma Next, Drizzle, Auth0, Clerk…
May 2026 · cipherstash.com · its alternatives →
23
An interactive tutorial on symmetric encryption▲5
symmetric encryption, speck, block modes, brute-force, nonce reuse
2022 · easylang.online · its alternatives →
24
TermiNode▲9
Verifiable GIS proof layer for spatial records
Jun 2026 · terminode.io · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →