| Date | Page | Link | Update Description |
| 23 October 09 | TCCH homepage | x | Added link to J. F. Byrne chronology |
| 24 October 09 | Historical Correspondences | x | Added link to 6 February 1957 letter from WFF to JFB |
| 30 October 09 | Progress Report #14 | x | |
| 31 October 09 | Progress Report #14 | x | Added Mike Cowan's opinion regarding the significance or insignificance of no intervals less than 9. |
| 19 November 09 | List of pt/ct indentities in Exhibit 1 | x | Four intervals were not sorted by offset. |
| 20 November 09 | Information about Henry E. Langen | x | Two
articles from the American Cryptogram Association's periodical "The
Cryptogram": a biography when he became editor in 1952, and an obituary
in 1962. |
| 18 December 2009 | Progress Report #11 | x | Mike
Cowan correctly pointed out an error in the analysis that ruled out a
C98 MM2 model with steps of 1/1/2/4. The error and correction are
now noted on the page. The result that this model is ruled out
remains unchanged even after the corrections. |
| 29 March 2010 | Progress Report #15 | x | Initial uploading. |
| 1 June 2010 | Progress Report #16 | x | The National Cryptologic Museum Foundation (NCMF) acquires the Chaocipher machine and papers |
| 2 July 2010 | Progress Report #17 | x | Chaocipher revealed: the actual algorithm is described publically for the first time. |
| 8 August 2010 | Progress Report #18 | x | Uploaded a paper providing an in-depth analysis of Exhibit 1 found in Byrne's "Silent Years". |