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Gwangbae Choi

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Related publications (6)

Please note that this is not a complete list of this person’s publications. It includes only semantically relevant works. For a full list, please refer to Infoscience.

Towards Witness Encryption Without Multilinear Maps

Serge Vaudenay, Gwangbae Choi

Current proposals of extractable witness encryption are based on multilinear maps. In this paper, we propose a new construction without. We propose the notion of hidden group with hashing and make an extractable witness encryption from it. We show that the ...

2021

Post-Compromise Security in Self-Encryption

Serge Vaudenay, Fatma Betül Durak, Gwangbae Choi

In self-encryption, a device encrypts some piece of information for itself to decrypt in the future. We are interested in security of self-encryption when the state occasionally leaks. Applications that use self-encryption include cloud storage, when a cli ...

2021

Time in cryptography

Time travel has always been a fascinating topic in literature and physics. In cryptography, one may wonder how to keep data confidential for some time. In this dissertation, we will study how to make private information travel to the future. This dissertat ...

EPFL2020