Andreas Happe: security

Secure Online Data Backup using Duplicity

This is part two of a series about encrypted file storage/archive systems. My plan is to try out duplicity, git using transparent encryption, s3-based storage systems, git-annex and encfs+sshfs as alternatives to Dropbox/Wuala/Spideroak. The conclusion will be a blog post containing a comparison a.k.a. “executive summary” of my findings. Stay tuned. Duplicity is a command-line tool similar to rsync: you give it two locations and it synchronizes the first location to the second.

June 27, 2013 in security linux tech privacy

Penetration testing

I am a RoR-developer gone pen-testing for the last couple of months. Clients range from smallish web portals to large multi-national financial institutions. So far I’ve a success rate well above 85%. This post reflects upon my modus operandi. It contains a high-level view of how I work: while specific techniques change the overall frame-of-mind stays the same, so I consider the latter more important than the former. Also I hope for feedback regarding techniques and tools.

June 23, 2013 in security

Avoiding Internet/Network Surveillance

Last week’s World Conference on International Telecommunications (WCIT) brought internet surveillance into public news: one outcome of the conference was standardization of DPI technology. This infrastructure standard will make it easier for governments to implement large-scale surveillance and/or filtering. Funny thing is that governments are already having those capabilities, they only want to standardize it. The public outrage came too late. So let’s protect you from governments at home or abroad, the RIAA, MPAA, random eavesdroppers and anyone else that want to listen in on your secrets while you’re surfing the Internet.

December 10, 2012 in tech linux security privacy

Linux: How to encrypt your data on hard drives, USB sticks, etc.

Imagine your Laptop (or Desktop Computer) being stolen. How long will it take and how much will it cost you to get back on track? Hardware will be easy: the cost for a new premium desktop is around $1000, for a new Laptop around $2000. Your data “should” be always be back-uped somewhere anyways. But this neglects a hidden cost: some thief has all your data, including all your online identities, photos, source for software projects and private notes/pictures that you do not want to be published.

December 2, 2012 in linux security privacy

Moving OctoPress to Amazon S3 and CloudFront

OctoPress is embraced for its simplicity: write blog posts, save them, generate HTML pages and move those upon a web server. As no code is executed server-side every page can be cached and security risks are low. So far I’m hosting my blog on a rented hetzner root-server in Germany. While there’s no server-side security problem I’m still using a full blown server which imposes maintenance overhead on me. No peace of mind.

November 3, 2012 in tech linux rails security