# Image Classification on MNIST (Plaintext and Encrypted Accuracy)

Source: [Image Classification on MNIST (Plaintext and Encrypted Accuracy)](<https://www.sota2.com/research/sota/image-classification-on-mnist-plaintext-and-encrypted-accuracy>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-05-25T08:58:33.497Z

Evaluation of Image Classification performance on the MNIST dataset, specifically measuring accuracy under plaintext execution versus encrypted execution, and the resulting accuracy gap.

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | Image Classification |
| Dataset (including any stated split) | MNIST |
| Metric | Plaintext Accuracy |
| Unit | PERCENT |
| Direction | Higher is better |
| Results loaded | 5 of 5 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [Plaintext Accuracy](<https://www.sota2.com/research/sota/image-classification-on-mnist-plaintext-and-encrypted-accuracy.md?metric=Plaintext%20Accuracy>): Higher is better; unit: PERCENT.

- [Encrypted Accuracy](<https://www.sota2.com/research/sota/image-classification-on-mnist-plaintext-and-encrypted-accuracy.md?metric=Encrypted%20Accuracy>): Higher is better; unit: PERCENT.

- [Accuracy Gap (%)](<https://www.sota2.com/research/sota/image-classification-on-mnist-plaintext-and-encrypted-accuracy.md?metric=Accuracy%20Gap%20(%25)>): Lower is better; unit: PERCENT.

## Recorded results

| Method | Plaintext Accuracy | Result date | Report paper |
| --- | --- | --- | --- |
| Chebyshev - 5 | 97.6 | Not recorded | 6a13d7a36f71c5ae7dc9e9dd |
| X Squared | 97.4 | Not recorded | 6a13d7a36f71c5ae7dc9e9dd |
| Kernel Polynomial | 97.3 | Not recorded | 6a13d7a36f71c5ae7dc9e9dd |
| FasterCryptoNets | 97.3 | Not recorded | 6a13d7a36f71c5ae7dc9e9dd |
| Chebyshev - 3 | 97.3 | Not recorded | 6a13d7a36f71c5ae7dc9e9dd |

### Chebyshev - 5

Plaintext Accuracy: 97.6. Result ID: 6a140f1ffbc373592c0b66e4.

[Reporting paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa70901e209131cea4bdab.md>)

Recorded evaluation configuration: {"Backbone":"ViT transformer","Encryption Scheme":"CKKS"}. This record does not assert independent reproduction.

### X Squared

Plaintext Accuracy: 97.4. Result ID: 6a140f1ffbc373592c0b66e1.

[Reporting paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

Recorded evaluation configuration: {"Backbone":"ViT transformer","Encryption Scheme":"CKKS"}. This record does not assert independent reproduction.

### Kernel Polynomial

Plaintext Accuracy: 97.3. Result ID: 6a140f1ffbc373592c0b66e0.

[Reporting paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

Recorded evaluation configuration: {"Backbone":"ViT transformer","Encryption Scheme":"CKKS"}. This record does not assert independent reproduction.

### FasterCryptoNets

Plaintext Accuracy: 97.3. Result ID: 6a140f1ffbc373592c0b66e2.

[Reporting paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa651b1e209131cea085ab.md>)

Recorded evaluation configuration: {"Backbone":"ViT transformer","Encryption Scheme":"CKKS"}. This record does not assert independent reproduction.

### Chebyshev - 3

Plaintext Accuracy: 97.3. Result ID: 6a140f1ffbc373592c0b66e3.

[Reporting paper](<https://www.sota2.com/research/paper/6a13d7a36f71c5ae7dc9e9dd.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa70901e209131cea4bdab.md>)

Recorded evaluation configuration: {"Backbone":"ViT transformer","Encryption Scheme":"CKKS"}. This record does not assert independent reproduction.

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