Wrappers for the Date object. More...

Detailed Description

Wrappers for the Date object.

Author: Copyright (C) 2019 Libor Polcak; Copyright (C) 2020 Peter Hornak

License:: SPDX-License-Identifier: GPL-3.0-or-later

This wrapper aims on prevention of microarchitectural attacks, clock-skew attacks, and other time related attacks. The goal is to limit the precision of the time returned by the Date object.

See also: https://www.fit.vut.cz/study/thesis/22308/?year=0&sup=Pol%C4%8D%C3%A1k, especially Sect. 7.2.; Tom Van Goethem, Wouter Joosen, Nick Nikiforakis. The Clock is Still Ticking: Timing Attacks in the Modern Web. CCS'15. Link, DOI; Schwarz, M., Lipp, M. a Gruss, D. JavaScript Zero: Real JavaScript and Zero Side-Channel Attacks. NDSS'18.; Schwarz M., Maurice C., Gruss D., Mangard S. (2017) Fantastic Timers and Where to Find Them: High-Resolution Microarchitectural Attacks in JavaScript. In: Kiayias A. (eds) Financial Cryptography and Data Security. FC 2017. Lecture Notes in Computer Science, vol 10322. Springer, Cham. https://doi.org/10.1007/978-3-319-70972-7_13

The wrappers support the following behaviour:

Round timestamp: Limit the precision by removing (a part of) the decimal part of the timestamp.
Randomize after rounding: Create a fake decimal part to confuse attackers and to create timestamps that look similar to expected timestamps.