Encrypted Deep Learning Classification with PyTorch and PySyft

In plain words

This is a deprecated blog post demonstrating encrypted deep learning classification using PyTorch and PySyft. It shows how to build a private neural network that classifies MNIST images through Secure Multi-Party Computation, achieving classification in under 33 milliseconds with over 98% accuracy. The post is intended for developers interested in privacy-preserving machine learning, though the PySyft version discussed is no longer supported and has been superseded by newer releases.

written from the facts on this page · September 2026

From the sources

Update as of November 18, 2021: The version of PySyft mentioned in this post has been deprecated. Any implementations using this older version of PySyft are unlikely to work. Stay tuned for the release of PySyft 0.6.0, a data centric library for use in production targeted for release in early December. Summary: Great theories need great implementations. We show in this blog how to use a private neural network to classify MNIST images using Secure Multi-Party Computation (SMPC). We achieve classification in <33ms with >98% accuracy over local (virtualized) computation. Note: If you want more posts like this just get in touch with @theoryffel and @OpenMinedOrg . Feel free to follow if you’d…from blog.openmined.org

• 
  Encrypted Deep Learning in PyTorch2018 · github.com · ▲37

  Perform data science on data that remains in someone else's server - OpenMined/PySyft

• 
  Train a Convolutional Neural Nets Using Multi-Party Computation2018 · blog.openmined.org · ▲28

  Most efforts to privately train machine-learning models either use homomorphic encryption or secure multi-party computation (MPC). Recent insights indicate…

• 
  TensorFlow 1.02018 · tensorflow.org · ▲80

  Open-source machine learning library by Google

• 
  I wrote a minimal deep learning library from scratch in Python2021 · github.com · ▲25

  A minimalist deep learning library written from scratch in Python - sradc/SmallPebble

• 
  Faster R-CNN object detector implemented in PyTorch and TensorFlow 22022 · github.com · ▲15

  Fresh and (I think) clean implementations of Faster R-CNN in PyTorch and TensorFlow 2&#x2F;Keras. I wanted to learn about object detectors and decided to understand and implement a foundational model in the field, Faster R-CNN (elements of which are still used in modern models to this day), using the paper alone. That proved to be more difficult than expected and I had to relent and take a peak at existing implementations to fill in some important gaps. I've documented my struggles and learnings in the README for others to benefit from. I also wanted to solidify my understanding of…

• 
  PyBV – A Python Implementation of the BV Homomorphic Encryption Scheme2017 · github.com · ▲9

  DEPRECATED- see https://github.com/OpenMined/OpenMined or https://github.com/OpenMined/PySyft - iamtrask/PyBV

• 
  SimCity, but with Permits▲926

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 2d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 14d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 15d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 9d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 13d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 23d ago · space.bl2.net

• 
  Jumbo: Privacy & Security▲936

  Your privacy assistant, by Sunrise co-founder

  Life & fun · 2019 · apps.apple.com

• 
  Lorem Picsum – Lorem Ipsum but for photos▲880

  Lorem Ipsum... but for photos

  Life & fun · 2019 · picsum.photos

• 
  UserGuiding 2.0▲782

  An easy way to show how your product works 😻

  Work · 2019 · userguiding.com

• 
  Startup 3▲745

  Create websites and landing pages with Startup 3 🚀

  Dev tools · 2019 · designmodo.com

• 
  1MB – Free and easy static website hosting and database▲744

  Unlock the full potential of your website with 1MB

  Dev tools · 2019 · 1mb.site

• 
  Mercury▲730

  Banking stack for startups

  Commerce · 2019 · mercury.com