IEICE TRANSACTIONS on Fundamentals
Forward Secure Message Franking with Updatable Reporting Tags
Summary :
Message franking is introduced by Facebook in end-to-end encrypted messaging services. It allows to produce verifiable reports of malicious messages by including cryptographic proofs, called reporting tags, generated by Facebook. Recently, Grubbs et al. (CRYPTO'17) proceeded with the formal study of message franking and introduced committing authenticated encryption with associated data (CAEAD) as a core primitive for obtaining message franking. In this work, we aim to enhance the security of message franking and introduce forward security and updates of reporting tags for message franking. Forward security guarantees the security associated with the past keys even if the current keys are exposed and updates of reporting tags allow for reporting malicious messages after keys are updated. To this end, we firstly propose the notion of key-evolving message franking with updatable reporting tags including additional key and reporting tag update algorithms. Then, we formalize five security requirements: confidentiality, ciphertext integrity, unforgeability, receiver binding, and sender binding. Finally, we show a construction of forward secure message franking with updatable reporting tags based on CAEAD, forward secure pseudorandom generator, and updatable message authentication code.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E106-A No.9 pp.1164-1176
- Publication Date
- 2023/09/01
- Publicized
- 2023/03/07
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.2022DMP0004
- Type of Manuscript
- Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
- Category
- Cryptography and Information Security
Authors
Hiroki YAMAMURO
Tokyo Institute of Technology
Keisuke HARA
National Institute of Advanced Industrial Science and Technology (AIST),Yokohama National University
Masayuki TEZUKA
Tsuruoka College
Yusuke YOSHIDA
Tokyo Institute of Technology
Keisuke TANAKA
Tokyo Institute of Technology
Keyword
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Hiroki YAMAMURO, Keisuke HARA, Masayuki TEZUKA, Yusuke YOSHIDA, Keisuke TANAKA, "Forward Secure Message Franking with Updatable Reporting Tags" in IEICE TRANSACTIONS on Fundamentals,
vol. E106-A, no. 9, pp. 1164-1176, September 2023, doi: 10.1587/transfun.2022DMP0004.
Abstract: Message franking is introduced by Facebook in end-to-end encrypted messaging services. It allows to produce verifiable reports of malicious messages by including cryptographic proofs, called reporting tags, generated by Facebook. Recently, Grubbs et al. (CRYPTO'17) proceeded with the formal study of message franking and introduced committing authenticated encryption with associated data (CAEAD) as a core primitive for obtaining message franking. In this work, we aim to enhance the security of message franking and introduce forward security and updates of reporting tags for message franking. Forward security guarantees the security associated with the past keys even if the current keys are exposed and updates of reporting tags allow for reporting malicious messages after keys are updated. To this end, we firstly propose the notion of key-evolving message franking with updatable reporting tags including additional key and reporting tag update algorithms. Then, we formalize five security requirements: confidentiality, ciphertext integrity, unforgeability, receiver binding, and sender binding. Finally, we show a construction of forward secure message franking with updatable reporting tags based on CAEAD, forward secure pseudorandom generator, and updatable message authentication code.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2022DMP0004/_p
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@ARTICLE{e106-a_9_1164,
author={Hiroki YAMAMURO, Keisuke HARA, Masayuki TEZUKA, Yusuke YOSHIDA, Keisuke TANAKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Forward Secure Message Franking with Updatable Reporting Tags},
year={2023},
volume={E106-A},
number={9},
pages={1164-1176},
abstract={Message franking is introduced by Facebook in end-to-end encrypted messaging services. It allows to produce verifiable reports of malicious messages by including cryptographic proofs, called reporting tags, generated by Facebook. Recently, Grubbs et al. (CRYPTO'17) proceeded with the formal study of message franking and introduced committing authenticated encryption with associated data (CAEAD) as a core primitive for obtaining message franking. In this work, we aim to enhance the security of message franking and introduce forward security and updates of reporting tags for message franking. Forward security guarantees the security associated with the past keys even if the current keys are exposed and updates of reporting tags allow for reporting malicious messages after keys are updated. To this end, we firstly propose the notion of key-evolving message franking with updatable reporting tags including additional key and reporting tag update algorithms. Then, we formalize five security requirements: confidentiality, ciphertext integrity, unforgeability, receiver binding, and sender binding. Finally, we show a construction of forward secure message franking with updatable reporting tags based on CAEAD, forward secure pseudorandom generator, and updatable message authentication code.},
keywords={},
doi={10.1587/transfun.2022DMP0004},
ISSN={1745-1337},
month={September},}
Copy
TY - JOUR
TI - Forward Secure Message Franking with Updatable Reporting Tags
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1164
EP - 1176
AU - Hiroki YAMAMURO
AU - Keisuke HARA
AU - Masayuki TEZUKA
AU - Yusuke YOSHIDA
AU - Keisuke TANAKA
PY - 2023
DO - 10.1587/transfun.2022DMP0004
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E106-A
IS - 9
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - September 2023
AB - Message franking is introduced by Facebook in end-to-end encrypted messaging services. It allows to produce verifiable reports of malicious messages by including cryptographic proofs, called reporting tags, generated by Facebook. Recently, Grubbs et al. (CRYPTO'17) proceeded with the formal study of message franking and introduced committing authenticated encryption with associated data (CAEAD) as a core primitive for obtaining message franking. In this work, we aim to enhance the security of message franking and introduce forward security and updates of reporting tags for message franking. Forward security guarantees the security associated with the past keys even if the current keys are exposed and updates of reporting tags allow for reporting malicious messages after keys are updated. To this end, we firstly propose the notion of key-evolving message franking with updatable reporting tags including additional key and reporting tag update algorithms. Then, we formalize five security requirements: confidentiality, ciphertext integrity, unforgeability, receiver binding, and sender binding. Finally, we show a construction of forward secure message franking with updatable reporting tags based on CAEAD, forward secure pseudorandom generator, and updatable message authentication code.
ER -
English
