feedbot: http://fixpoint.welshcomputing.com/2020/errata-for-gbw-node-drafts-to-date-and-bitcoin-txid-collisions/ << Fixpoint -- Errata for gbw-node drafts to date, and Bitcoin txid collisions

feedbot: http://qntra.net/2020/01/sha1-collisions-get-cheaper/ << Qntra -- SHA1 Collisions Get Cheaper

feedbot: http://www.loper-os.org/?p=3636 << Loper OS -- "Finite Field Arithmetic." Chapter 20B: Support for Selected Ancient Hash Algos in "Litmus."