Had not yet realized that the cost of chosen-prefix collisions against SHA-1 has come down to ≈500k USD due to the cryptocurrency crash: https://fse.iacr.org/2019/files/rump/fse2019_rump-14.pdf … Full talk & paper by Gaëtan Leurent & Thomas Peyrin to appear at EUROCRYPT 2019 (held at TU Darmstadt, my alma mater)
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Interesting...
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