Paper 2021/968

White-Box Implementations for Hash-Based Signatures and One-Time Passwords

Kemal Bicakci, Kemal Ulker, Yusuf Uzunay, Halis Taha Şahin, and Muhammed Said Gündoğan


White-box cryptography challenges the assumption that the end points are trusted and aims at providing protection against an adversary more powerful than the one in the traditional black-box cryptographic model. Most existing white-box implementations focus on symmetric encryption. In particular, we are not aware of any previous work on general-purpose quantum-safe digital signature schemes also secure against white-box attackers. We present white-box implementations for hash-based signatures so that the security against white-box attackers depends on the availability of a white-box secure pseudorandom function (in addition to a general one-way function). We also present a hash tree-based solution for one-time passwords secure in a white-box attacker context. We implement the proposed solutions and share our performance results.

Note: New sections (Section 7: Security Analysis and Space-Hardness of the Schemes and Section 8: Implementation) are added. Other sections are also revised.

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Publication info
Preprint. MINOR revision.
white-box cryptographydigital signaturewhite-box signaturequantum-safe signaturehash chainone-time passwordhash tree
Contact author(s)
bicakcikemal @ gmail com
kemalbicakci @ itu edu tr
2022-02-28: revised
2021-07-22: received
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      author = {Kemal Bicakci and Kemal Ulker and Yusuf Uzunay and Halis Taha Şahin and Muhammed Said Gündoğan},
      title = {White-Box Implementations for Hash-Based Signatures and One-Time Passwords},
      howpublished = {Cryptology ePrint Archive, Paper 2021/968},
      year = {2021},
      note = {\url{}},
      url = {}
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