Siena Anstis is a senior legal advisor at the Citizen Lab. She is a lawyer admitted to practice in Ontario and New York and a researcher in the areas of international law, human rights, technology, and migration.
She has worked as a refugee lawyer in Canada, a litigation associate at Morrison Foerster LLP in New York City, and as a judicial clerk at the Supreme Court of Canada (2015-2016) and the Court of Appeal for Ontario (2014-2015). She holds a Master of Law from the University of Cambridge (2020), a Bachelor of Laws and Bachelor of Civil Law from McGill University (2014), and a Bachelor of Arts in journalism and anthropology from Concordia University (2009). She is currently completing a PhD in Law at the University of Oslo.
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Publications
Not Safe for Politics
Cellebrite Used on Kenyan Activist and Politician Boniface Mwangi
Following the widely-condemned arrest in July 2025 of prominent Kenyan opposition voice Boniface Mwangi, the Citizen Lab analyzed artefacts from devices seized during the arrest. We found that Cellebrite’s forensic extraction tools were used on his Samsung phone while it was in police custody. This case adds to the concerning pattern of the misuse of Cellebrite technology by government clients.
From Protest to Peril
Cellebrite Used Against Jordanian Civil Society
Through a multi-year investigation, we find that the Jordanian security apparatus has deployed forensic extraction products manufactured by Cellebrite against civil society devices. We release these findings alongside reporting from the Organized Crime and Corruption Reporting Project (OCCRP) which includes interviews with a few of the victims.
Weaponized Words
Uyghur Language Software Hijacked to Deliver Malware
Our investigation of a spearphishing campaign that targeted senior members of the World Uyghur Congress in March 2025 reveals a highly-customized attack delivery method. The ruse used by attackers replicates a pattern in which threat actors weaponize software and websites aimed at preserving and supporting marginalized and repressed cultures to target those same communities.
