Source: hashcash Section: mail Priority: optional Standards-Version: 4.7.0 Maintainer: Debian Security Tools Uploaders: Simon Josefsson , Build-Depends: debhelper-compat (= 13), Rules-Requires-Root: no Homepage: http://hashcash.org/ Vcs-Browser: https://salsa.debian.org/debian/hashcash Vcs-Git: https://salsa.debian.org/debian/hashcash.git -b debian/latest Package: hashcash Architecture: any Depends: ${misc:Depends}, ${shlibs:Depends}, Description: postage payment scheme for email based on hash calculations Hashcash is a payment scheme that uses CPU cycles as the form of payment. This can be used as a counter-measure for junk email (spam) by using the hashcash token as a proof of payment for each email that you sent.