Simon Tatham

chiark.greenend.org.uk/~sgtatham

Welcome to my web site. I'm Simon Tatham, a software engineer and free-software author in Cambridge, UK.

Popular posts: 16
Total points: 4,224
HN comments: 1,891
Rank: #296 personal

Visit chiark.greenend.org.uk/~sgtatham → On Hacker News May 2010 – May 2026

Software Engineering 10 Open Source 5 Security & Privacy 4 Math & Algorithms 4 Systems & Performance 2 Tools & Productivity 1

Most points Most discussed Most cited Newest

PuTTY vulnerability vuln-p521-bias

2024558 points212 comments Security & Privacy details

Iconography of the PuTTY tools

2025400 points105 comments Design & UX details

In March 2025 I received an email asking about PuTTY’s “logo” – the icon used by the Windows executable. The sender wanted to know where it had come from, and how it had evolved over time.

PuTTY vulnerability vuln-p521-bias

Iconography of the PuTTY tools

PuTTY 0.68 has been released

PuTTY 0.63 released, fixing four security holes

PuTTY 0.66 fixes security vulnerability