Content Defined Chunking Attack.

[DiagonalArg]

Is Duplicacy susceptible to this chunking attack?

Truong, K. T., Merz, S.-P., Scarlata, M., Günther, F., and Paterson, K. G. Breaking and fixing content-defined chunking. Unpublished manuscript (submitted), January 2025.

Hacker News discussion

Apparently both Restic and Borg are susceptible:

[rawtaz]

Apparently both restic/restic#5291 and Borg are susceptible:

Restic has mitigated this attack since version 0.18.0. Also note that the chances of a practical attack were low in the first place.

[DiagonalArg]

As they say, attacks only get bigger.

But my question was about duplicacy.