Logo of the University of Heidelberg —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=6375641

Johannes Trithemius — Detail of tomb relief of Johannes Trithemius. Originally in the Schottenkirche St. Jakob, it was moved to the Neumünster
Photo Credit: By CSvBibra - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=7474171

Execution of Mary, Queen of Scots — The scene, drawn by eyewitness Robert Beale
Photo Credit: By Unknown - http://www.tudorplace.com.ar/Bios/MaryStuart.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1001938

Postscript to Mary's letter to Babington — Walsingham's "Decypherer" forged this cipher postscript to Mary's letter to Babington. It asks Babington to use the—broken—cipher to tell her the names of the conspirators.
Alongside Babington's record of the cipher used.
Photo Credit: By Thomas Phelippes and Anthony Babington - Public Domain, https://commons.wikimedia.org/w/index.php?curid=680810

Anthony Babington — cropped
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=15013755

Tutbury Castle — North Tower
Photo Credit: By Richard Croft, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=62108989

Pope Pius V — cropped
Photo Credit: By El Greco - Public Domain, https://commons.wikimedia.org/w/index.php?curid=152205

Adrian Lamo —
Photo Credit: Photo by Matthew Griffiths -Public Domain, https://commons.wikimedia.org/w/index.php?curid=10895381

WikiLeaks logo —
Photo Credit: By Original:Wikileaks , NowikileaksVector:Cirt - Media Kit - CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=6011273

Julian Assange — 8/18/2014 - London
Photo Credit: By Cancillería del Ecuador - https://www.flickr.com/photos/dgcomsoc/14953880621/, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=34813739

Chelsea Manning —
Photo Credit: .By Tim Travers Hawkins, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=59051881