Broken schemes in last release
adelapie opened this issue · 0 comments
adelapie commented
Hello,
At CT-RSA 2021 Venema and Alpar presented attacks against 11 ABE schemes and two of them are implemented in the last version of CHARM: DAC-MACS and MA-ABE-YJ14:
- https://jhuisi.github.io/charm/charm/schemes/abenc/abenc_dacmacs_yj14.html
- https://jhuisi.github.io/charm/_modules/abenc_maabe_yj14.html
Moreover, the YCT14 scheme was broken in 2019 and is also implemented in
CHARM: https://github.com/JHUISI/charm/blob/dev/charm/schemes/abenc/abenc_yct14.py
It is possible to mount decryption attacks against them.
References:
https://eprint.iacr.org/2020/460
https://www2.hci.uni-hannover.de/papers/Tan2019.pdf