Soatok DreamseekerChoose cryptography, where you can have to explain tautology like "the empty string is the prefix to every string" to computer science majors that don't understand domain separation.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.