Post-quantum security of IGE mode encryption in Telegram

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IGE mode used in Telegram's customized protocol has not been fully investigated in terms of post-quantum security. In this letter, we show that IGE mode is IND-qCPA insecure by Simon's algorithm, assuming that the underlying block cipher is a standard-secure pseudorandom function (sPRF). Under a stronger assumption that the block cipher is a quantum-secure pseudorandom function (qPRF), IND-qCPA security of IGE mode is proved using one-way to hiding lemma.
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Issue Date
2019-01
Language
English
Article Type
Article
Citation

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS, COMMUNICATIONS AND COMPUTER SCIENCES, v.E102-A, no.1, pp.148 - 151

ISSN
1745-1337
DOI
10.1587/transfun.E102.A.148
URI
http://hdl.handle.net/10203/251514
Appears in Collection
CS-Journal Papers(저널논문)
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