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Declined by Dan arndt 4 days ago. Last edited by Dan arndt 4 days ago. Reviewer: Inform author.

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SymmetricMorph

SymmetricMorph is a lightweight symmetric stream cipher designed by Suren Krmoian in 2025. It is intended for efficient data encryption without external dependencies, supporting Node.js, web browsers, and Web Workers.

History

Development of SymmetricMorph began in early 2025. The project was created as a lightweight alternative to heavier standard encryption algorithms for applications where small library size and independence from third-party packages are critical. The author of the project is Suren Krmoian, a software developer with many years of experience in web technologies and server-side system design.

Description

SymmetricMorph implements symmetric stream encryption using the following mechanisms:

dynamic byte masking;
cascading feedback for internal state updates;
a custom pseudorandom number generator (PRNG);
built-in stream-based message authentication code (MAC) for integrity verification.

Encryption is performed byte-by-byte, with progressive updates to the internal state, ensuring good entropy distribution and resistance to basic known-plaintext attacks.

Applications

SymmetricMorph is intended for use in:

encrypting data in browsers without blocking the main thread;
background file encryption via Web Workers;
securing data in Node.js applications;
mobile applications and Progressive Web Apps (PWA);
projects requiring independence from heavyweight cryptographic libraries.

Features

Zero external dependencies.
Support for chunked (stream) encryption of large files.
Compatibility with browsers, Node.js, and Web Workers.
Minimal library size.
MIT License.

Author

Suren Krmoian — a software developer and the creator of SymmetricMorph. He has many years of experience in web development and backend system architecture.

References

[GitHub repository](https://github.com/sur-ser/symmetricmorph)
[NPM package](https://www.npmjs.com/package/symmetricmorph)
[Testing results](https://github.com/sur-ser/symmetricmorph/blob/main/TESTING.md)

License

SymmetricMorph is released under the MIT License.