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Burn After Reading: Online Adaptation for Cross-domain Streaming Data

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Computer Vision – ECCV 2022 (ECCV 2022)

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Abstract

In the context of online privacy, many methods propose complex security preserving measures to protect sensitive data. In this paper we note that: not storing any sensitive data is the best form of security. We propose an online framework called “Burn After Reading”, i.e. each online sample is permanently deleted after it is processed. Our framework utilizes the labels from the public data and predicts on the unlabeled sensitive private data. To tackle the inevitable distribution shift from the public data to the private data, we propose a novel unsupervised domain adaptation algorithm that aims at the fundamental challenge of this online setting–the lack of diverse source-target data pairs. We design a Cross-Domain Bootstrapping approach, named CroDoBo, to increase the combined data diversity across domains. To fully exploit the valuable discrepancies among the diverse combinations, we employ the training strategy of multiple learners with co-supervision. CroDoBo achieves state-of-the-art online performance on four domain adaptation benchmarks. Code is available here.

C. Ramaiah—Work was done at Salesforce.

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Notes

  1. 1.

    Article 17 GDPR - Right to be forgotten https://gdpr.eu/article-17-right-to-be-forgotten/.

  2. 2.

    https://wilds.stanford.edu/leaderboard/.

References

  1. de Barros, R.S.M., de Carvalho Santos, S.G.T., Júnior, P.M.G.: A boosting-like online learning ensemble. In: 2016 International Joint Conference on Neural Networks (IJCNN), pp. 1871–1878. IEEE (2016)

    Google Scholar 

  2. Berthelot, D., Carlini, N., Goodfellow, I., Papernot, N., Oliver, A., Raffel, C.: Mixmatch: a holistic approach to semi-supervised learning. arXiv preprint arXiv:1905.02249 (2019)

  3. Chen, J., Wu, X., Duan, L., Gao, S.: Domain adversarial reinforcement learning for partial domain adaptation. IEEE Trans. Neural Netw. Learn. Syst. (2020)

    Google Scholar 

  4. Chen, Y., Luo, H., Ma, T., Zhang, C.: Active online learning with hidden shifting domains. In: International Conference on Artificial Intelligence and Statistics, pp. 2053–2061. PMLR (2021)

    Google Scholar 

  5. Cubuk, E.D., Zoph, B., Shlens, J., Le, Q.V.: RandAugment: practical automated data augmentation with a reduced search space. In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, pp. 702–703 (2020)

    Google Scholar 

  6. Delussu, R., Putzu, L., Fumera, G., Roli, F.: Online domain adaptation for person re-identification with a human in the loop. In: 2020 25th International Conference on Pattern Recognition (ICPR), pp. 3829–3836. IEEE (2021)

    Google Scholar 

  7. Deng, J., Dong, W., Socher, R., Li, L.J., Li, K., Fei-Fei, L.: Imagenet: a large-scale hierarchical image database. In: 2009 IEEE Conference on Computer Vision and Pattern Recognition, pp. 248–255. IEEE (2009)

    Google Scholar 

  8. Dredze, M., Crammer, K.: Online methods for multi-domain learning and adaptation. In: Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing, pp. 689–697 (2008)

    Google Scholar 

  9. Elliott, S.J., Rafaely, B.: Frequency-domain adaptation of causal digital filters. IEEE Trans. Sig. Process. 48(5), 1354–1364 (2000)

    Article  Google Scholar 

  10. Gal, Y., Ghahramani, Z.: Dropout as a Bayesian approximation: representing model uncertainty in deep learning. In: International Conference on Machine Learning, pp. 1050–1059. PMLR (2016)

    Google Scholar 

  11. Gal, Y., Hron, J., Kendall, A.: Concrete dropout. arXiv preprint arXiv:1705.07832 (2017)

  12. Ganin, Y., Ustinova, E., Ajakan, H., Germain, P., Larochelle, H., Laviolette, F., Marchand, M., Lempitsky, V.: Domain-adversarial training of neural networks. JMLR 17(1), 2096–2030 (2016)

    Google Scholar 

  13. Garg, S., Goldwasser, S., Vasudevan, P.N.: Formalizing data deletion in the context of the right to be forgotten. In: Canteaut, A., Ishai, Y. (eds.) EUROCRYPT 2020. LNCS, vol. 12106, pp. 373–402. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-45724-2_13

    Chapter  MATH  Google Scholar 

  14. Grandvalet, Y., Bengio, Y., et al.: Semi-supervised learning by entropy minimization. CAP 367, 281–296 (2005)

    Google Scholar 

  15. Graves, L., Nagisetty, V., Ganesh, V.: Does AI remember? Neural Networks and the Right to be Forgotten (2020)

    Google Scholar 

  16. Guo, H., Chen, B., Tang, R., Zhang, W., Li, Z., He, X.: An embedding learning framework for numerical features in CTR prediction. In: Proceedings of the 27th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, pp. 2910–2918 (2021)

    Google Scholar 

  17. Han, B., Sim, J., Adam, H.: Branchout: regularization for online ensemble tracking with convolutional neural networks. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 3356–3365 (2017)

    Google Scholar 

  18. He, K., Zhang, X., Ren, S., Sun, J.: Deep residual learning for image recognition. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 770–778 (2016)

    Google Scholar 

  19. Hu, J., et al.: Discriminative partial domain adversarial network. In: Vedaldi, A., Bischof, H., Brox, T., Frahm, J.-M. (eds.) ECCV 2020. LNCS, vol. 12372, pp. 632–648. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-58583-9_38

    Chapter  Google Scholar 

  20. Huang, G., Liu, Z., Van Der Maaten, L., Weinberger, K.Q.: Densely connected convolutional networks. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 4700–4708 (2017)

    Google Scholar 

  21. Jaber, G., Cornuéjols, A., Tarroux, P.: Online learning: searching for the best forgetting strategy under concept drift. In: Lee, M., Hirose, A., Hou, Z.-G., Kil, R.M. (eds.) ICONIP 2013. LNCS, vol. 8227, pp. 400–408. Springer, Heidelberg (2013). https://doi.org/10.1007/978-3-642-42042-9_50

    Chapter  Google Scholar 

  22. Jain, V., Learned-Miller, E.: Online domain adaptation of a pre-trained cascade of classifiers. In: CVPR 2011, pp. 577–584. IEEE (2011)

    Google Scholar 

  23. Jin, X., Chen, P.Y., Hsu, C.Y., Yu, C.M., Chen, T.: Cafe: catastrophic data leakage in vertical federated learning. arXiv preprint arXiv:2110.15122 (2021)

  24. Kaissis, G.A., Makowski, M.R., Rückert, D., Braren, R.F.: Secure, privacy-preserving and federated machine learning in medical imaging. Nat. Mach. Intell. 2(6), 305–311 (2020)

    Article  Google Scholar 

  25. Kang, G., Jiang, L., Yang, Y., Hauptmann, A.G.: Contrastive adaptation network for unsupervised domain adaptation. In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp. 4893–4902 (2019)

    Google Scholar 

  26. Koh, P.W., et al.: Wilds: a benchmark of in-the-wild distribution shifts. In: International Conference on Machine Learning, pp. 5637–5664. PMLR (2021)

    Google Scholar 

  27. Lafarge, M.W., Pluim, J.P.W., Eppenhof, K.A.J., Moeskops, P., Veta, M.: Domain-adversarial neural networks to address the appearance variability of histopathology images. In: Cardoso, M.J., et al. (eds.) DLMIA/ML-CDS -2017. LNCS, vol. 10553, pp. 83–91. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-67558-9_10

    Chapter  Google Scholar 

  28. Lee, D.H., et al.: Pseudo-label: the simple and efficient semi-supervised learning method for deep neural networks. In: Workshop on Challenges in Representation Learning, ICML, vol. 3, p. 896 (2013)

    Google Scholar 

  29. Lee, S., Kim, D., Kim, N., Jeong, S.G.: Drop to adapt: learning discriminative features for unsupervised domain adaptation. In: ICCV (2019)

    Google Scholar 

  30. Li, Y., Liang, Y.: Learning overparameterized neural networks via stochastic gradient descent on structured data. arXiv preprint arXiv:1808.01204 (2018)

  31. Li, Y., Yuan, L., Vasconcelos, N.: Bidirectional learning for domain adaptation of semantic segmentation. In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp. 6936–6945 (2019)

    Google Scholar 

  32. Liang, J., Hu, D., Feng, J.: Do we really need to access the source data? Source hypothesis transfer for unsupervised domain adaptation. In: International Conference on Machine Learning, pp. 6028–6039. PMLR (2020)

    Google Scholar 

  33. Liang, J., Hu, D., Feng, J.: Domain adaptation with auxiliary target domain-oriented classifier. In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp. 16632–16642 (2021)

    Google Scholar 

  34. Liu, W., Wang, Z., Liu, X., Zeng, N., Liu, Y., Alsaadi, F.E.: A survey of deep neural network architectures and their applications. Neurocomputing 234, 11–26 (2017)

    Article  Google Scholar 

  35. Liu, Z., Luo, P., Qiu, S., Wang, X., Tang, X.: DeepFashion: powering robust clothes recognition and retrieval with rich annotations. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 1096–1104 (2016)

    Google Scholar 

  36. Long, M., Cao, Y., Wang, J., Jordan, M.: Learning transferable features with deep adaptation networks. In: International Conference on Machine Learning, pp. 97–105. PMLR (2015)

    Google Scholar 

  37. Long, M., Cao, Z., Wang, J., Jordan, M.I.: Conditional adversarial domain adaptation. arXiv preprint arXiv:1705.10667 (2017)

  38. Lu, J., Liu, A., Dong, F., Gu, F., Gama, J., Zhang, G.: Learning under concept drift: a review. IEEE Trans. Knowl. Data Eng. 31(12), 2346–2363 (2018)

    Google Scholar 

  39. Ma, X., Gao, J., Xu, C.: Active universal domain adaptation. In: Proceedings of the IEEE/CVF International Conference on Computer Vision, pp. 8968–8977 (2021)

    Google Scholar 

  40. Mancini, M., Karaoguz, H., Ricci, E., Jensfelt, P., Caputo, B.: Kitting in the wild through online domain adaptation. In: 2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pp. 1103–1109. IEEE (2018)

    Google Scholar 

  41. Minku, L.L., White, A.P., Yao, X.: The impact of diversity on online ensemble learning in the presence of concept drift. IEEE Trans. Knowl. Data Eng. 22(5), 730–742 (2009)

    Article  Google Scholar 

  42. Moon, J., Das, D., Lee, C.G.: Multi-step online unsupervised domain adaptation. In: ICASSP 2020–2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 41172–41576. IEEE (2020)

    Google Scholar 

  43. Nakkiran, P., Neyshabur, B., Sedghi, H.: The deep bootstrap framework: good online learners are good offline generalizers. arXiv preprint arXiv:2010.08127 (2020)

  44. Nanni, L., Ghidoni, S., Brahnam, S.: Handcrafted vs. non-handcrafted features for computer vision classification. Pattern Recogn. 71, 158–172 (2017)

    Google Scholar 

  45. Osband, I.: Risk versus uncertainty in deep learning: Bayes, bootstrap and the dangers of dropout. In: NIPS Workshop on Bayesian Deep Learning, vol. 192 (2016)

    Google Scholar 

  46. Pagallo, U., Durante, M.: Human rights and the right to be forgotten. In: Human Rights, Digital Society and the Law, pp. 197–208. Routledge (2019)

    Google Scholar 

  47. Paszke, A., et al.: Automatic differentiation in PyTorch (2017)

    Google Scholar 

  48. Peng, X., Bai, Q., Xia, X., Huang, Z., Saenko, K., Wang, B.: Moment matching for multi-source domain adaptation. In: Proceedings of the IEEE International Conference on Computer Vision, pp. 1406–1415 (2019)

    Google Scholar 

  49. Peng, X., Usman, B., Kaushik, N., Wang, D., Hoffman, J., Saenko, K.: Visda: a synthetic-to-real benchmark for visual domain adaptation. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition Workshops, pp. 2021–2026 (2018)

    Google Scholar 

  50. Politou, E., Alepis, E., Virvou, M., Patsakis, C.: The “right to be forgotten’’ in the GDPR: implementation challenges and potential solutions. In: Politou, E., Alepis, E., Virvou, M., Patsakis, C. (eds.) Privacy and Data Protection Challenges in the Distributed Era. earning and Analytics in Intelligent Systems, vol. 26, pp. 41–68. Springer, Cham (2022). https://doi.org/10.1007/978-3-030-85443-0_4

    Chapter  Google Scholar 

  51. Prabhu, V., Chandrasekaran, A., Saenko, K., Hoffman, J.: Active domain adaptation via clustering uncertainty-weighted embeddings. In: Proceedings of the IEEE/CVF International Conference on Computer Vision, pp. 8505–8514 (2021)

    Google Scholar 

  52. Qi, G.J., Hua, X.S., Rui, Y., Tang, J., Zhang, H.J.: Two-dimensional multilabel active learning with an efficient online adaptation model for image classification. IEEE Trans. Pattern Anal. Mach. Intell. 31(10), 1880–1897 (2008)

    Google Scholar 

  53. Rai, P., Saha, A., Daumé III, H., Venkatasubramanian, S.: Domain adaptation meets active learning. In: Proceedings of the NAACL HLT 2010 Workshop on Active Learning for Natural Language Processing, pp. 27–32 (2010)

    Google Scholar 

  54. Rosen, J.: The right to be forgotten. Stan. L. Rev. Online 64, 88 (2011)

    Google Scholar 

  55. Russakovsky, O., et al.: Imagenet large scale visual recognition challenge. Int. J. Comput. Vision 115(3), 211–252 (2015)

    Article  MathSciNet  Google Scholar 

  56. Sahoo, D., Pham, Q., Lu, J., Hoi, S.C.: Online deep learning: learning deep neural networks on the fly. arXiv preprint arXiv:1711.03705 (2017)

  57. Saito, K., Kim, D., Sclaroff, S., Darrell, T., Saenko, K.: Semi-supervised domain adaptation via minimax entropy. In: Proceedings of the IEEE/CVF International Conference on Computer Vision, pp. 8050–8058 (2019)

    Google Scholar 

  58. Saito, K., Ushiku, Y., Harada, T., Saenko, K.: Adversarial dropout regularization. arXiv preprint arXiv:1711.01575 (2017)

  59. Saito, K., Watanabe, K., Ushiku, Y., Harada, T.: Maximum classifier discrepancy for unsupervised domain adaptation. In: CVPR (2018)

    Google Scholar 

  60. Schmitz, A., Bansho, Y., Noda, K., Iwata, H., Ogata, T., Sugano, S.: Tactile object recognition using deep learning and dropout. In: 2014 IEEE-RAS International Conference on Humanoid Robots, pp. 1044–1050. IEEE (2014)

    Google Scholar 

  61. Shi, Y., et al.: Gradient matching for domain generalization. arXiv preprint arXiv:2104.09937 (2021)

  62. Shu, R., Bui, H.H., Narui, H., Ermon, S.: A dirt-t approach to unsupervised domain adaptation. In: ICLR (2018)

    Google Scholar 

  63. Sohn, K., et al.: FixMatch: simplifying semi-supervised learning with consistency and confidence. arXiv preprint arXiv:2001.07685 (2020)

  64. Sun, B., Feng, J., Saenko, K.: Return of frustratingly easy domain adaptation. In: AAAI (2016)

    Google Scholar 

  65. Sun, Y., Wang, X., Liu, Z., Miller, J., Efros, A., Hardt, M.: Test-time training with self-supervision for generalization under distribution shifts. In: International Conference on Machine Learning, pp. 9229–9248. PMLR (2020)

    Google Scholar 

  66. Taufique, A.M.N., Jahan, C.S., Savakis, A.: CONDA: continual unsupervised domain adaptation. arXiv preprint arXiv:2103.11056 (2021)

  67. Tzeng, E., Hoffman, J., Saenko, K., Darrell, T.: Adversarial discriminative domain adaptation. In: CVPR (2017)

    Google Scholar 

  68. Varsavsky, T., Orbes-Arteaga, M., Sudre, C.H., Graham, M.S., Nachev, P., Cardoso, M.J.: Test-time unsupervised domain adaptation. In: Martel, A.L., et al. (eds.) MICCAI 2020. LNCS, vol. 12261, pp. 428–436. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-59710-8_42

    Chapter  Google Scholar 

  69. Villaronga, E.F., Kieseberg, P., Li, T.: Humans forget, machines remember: artificial intelligence and the right to be forgotten. Comput. Law Secur. Rev. 34(2), 304–313 (2018)

    Article  Google Scholar 

  70. Vu, T.H., Jain, H., Bucher, M., Cord, M., Pérez, P.: Advent: adversarial entropy minimization for domain adaptation in semantic segmentation. In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp. 2517–2526 (2019)

    Google Scholar 

  71. Wang, D., Shelhamer, E., Liu, S., Olshausen, B., Darrell, T.: Tent: fully test-time adaptation by entropy minimization. In: International Conference on Learning Representations (2020)

    Google Scholar 

  72. Wang, Q., Rao, W., Sun, S., Xie, L., Chng, E.S., Li, H.: Unsupervised domain adaptation via domain adversarial training for speaker recognition. In: 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 4889–4893. IEEE (2018)

    Google Scholar 

  73. Wang, R., Wu, Z., Weng, Z., Chen, J., Qi, G.J., Jiang, Y.G.: Cross-domain contrastive learning for unsupervised domain adaptation. IEEE Trans. Multimedia (2022)

    Google Scholar 

  74. Warde-Farley, D., Goodfellow, I.J., Courville, A., Bengio, Y.: An empirical analysis of dropout in piecewise linear networks. arXiv preprint arXiv:1312.6197 (2013)

  75. Wei, K., et al.: Federated learning with differential privacy: algorithms and performance analysis. IEEE Trans. Inf. Forensics Secur. 15, 3454–3469 (2020)

    Article  Google Scholar 

  76. Wei, Z., Chen, J., Goldblum, M., Wu, Z., Goldstein, T., Jiang, Y.G.: Towards transferable adversarial attacks on vision transformers. In: Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, pp. 2668–2676 (2022)

    Google Scholar 

  77. Wu, Z., et al.: DCAN: dual channel-wise alignment networks for unsupervised scene adaptation. In: Ferrari, V., Hebert, M., Sminchisescu, C., Weiss, Y. (eds.) ECCV 2018. LNCS, vol. 11209, pp. 535–552. Springer, Cham (2018). https://doi.org/10.1007/978-3-030-01228-1_32

    Chapter  Google Scholar 

  78. Xiao, H., Rasul, K., Vollgraf, R.: Fashion-MNIST: a novel image dataset for benchmarking machine learning algorithms. arXiv preprint arXiv:1708.07747 (2017)

  79. Xu, X., et al.: Information leakage by model weights on federated learning. In: Proceedings of the 2020 Workshop on Privacy-Preserving Machine Learning in Practice, pp. 31–36 (2020)

    Google Scholar 

  80. Yang, L., Balaji, Y., Lim, S.-N., Shrivastava, A.: Curriculum manager for source selection in multi-source domain adaptation. In: Vedaldi, A., Bischof, H., Brox, T., Frahm, J.-M. (eds.) ECCV 2020. LNCS, vol. 12359, pp. 608–624. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-58568-6_36

    Chapter  Google Scholar 

  81. Yang, L., et al.: Deep co-training with task decomposition for semi-supervised domain adaptation. arXiv preprint arXiv:2007.12684 (2020)

  82. Zhang, N., et al.: AliCG: fine-grained and evolvable conceptual graph construction for semantic search at Alibaba. arXiv preprint arXiv:2106.01686 (2021)

  83. Zhang, X., Chen, X., Liu, J.K., Xiang, Y.: DeepPAR and DeepDPA: privacy preserving and asynchronous deep learning for industrial IoT. IEEE Trans. Industr. Inf. 16(3), 2081–2090 (2019)

    Article  Google Scholar 

  84. Zhang, Y., et al.: Covid-DA: deep domain adaptation from typical pneumonia to Covid-19. arXiv preprint arXiv:2005.01577 (2020)

  85. Zhang, Y., Liu, T., Long, M., Jordan, M.: Bridging theory and algorithm for domain adaptation. In: International Conference on Machine Learning, pp. 7404–7413. PMLR (2019)

    Google Scholar 

  86. Zhao, S., et al.: Multi-source domain adaptation for semantic segmentation. arXiv preprint arXiv:1910.12181 (2019)

  87. Zhu, L., Han, S.: Deep leakage from gradients. In: Yang, Q., Fan, L., Yu, H. (eds.) Federated Learning. LNCS (LNAI), vol. 12500, pp. 17–31. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-63076-8_2

    Chapter  Google Scholar 

  88. Ziller, A., Usynin, D., Braren, R., Makowski, M., Rueckert, D., Kaissis, G.: Medical imaging deep learning with differential privacy. Sci. Rep. 11(1), 1–8 (2021)

    Article  Google Scholar 

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Yang, L., Gao, M., Chen, Z., Xu, R., Shrivastava, A., Ramaiah, C. (2022). Burn After Reading: Online Adaptation for Cross-domain Streaming Data. In: Avidan, S., Brostow, G., Cissé, M., Farinella, G.M., Hassner, T. (eds) Computer Vision – ECCV 2022. ECCV 2022. Lecture Notes in Computer Science, vol 13693. Springer, Cham. https://doi.org/10.1007/978-3-031-19827-4_24

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