awn umar

Programmer mostly working on security stuff. Mathematics and computer science at the University of Bristol. Here I post about things I’m working on or thinking about.

recent posts

• 2020-12-16 : : rosen: censorship-resistant proxy tunnel
• 2020-02-20 : : plausibly deniable encryption
• 2019-07-20 : : memory retention attacks
• 2019-07-18 : : encrypting secrets in memory

projects

• memguard : : secure software enclave for storage of sensitive information in memory
• rosen : : modular proxy tunnel that circumvents censorship by encapsulating traffic within a cover protocol
• gravity : : experimental user-space data protection utility providing plausibly deniable encryption
• ephemeral : : web-based end-to-end encrypted multi-party chat server

papers

Obfuscating Network Traffic to Circumvent Censorship [pdf]

Explore widely used network traffic fingerprinting and obfuscation techniques. Introduce a modular proxy tunnel framework and evaluate it against state-of-the- art DPI engines and a nation-state adversary.

Minimal Surface Theory: The Mathematics of Soap Films [pdf]

An introduction to minimal surfaces and their relation to soap films, and some ways that they can be created.