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I am a Systems Engineer and Privacy Researcher based in Barcelona, EU.

I am currently working at

I was part of the Information Security Group in the Department of Telematics Engineering at Universitat Politècnica de Catalunya (UPC) where I got my Ph.D.

I research topics in the fields of privacy and anonymity online.

I am an adjunct professor at Universitat Oberta de Catalunya (UOC)

$ ./about --website

This website is available under different domains that I have used through the years.

In no particular order:

All redirect to:

You can read sifr as you would read cipher. In fact in the word “cipher” in the middle age meant “zero” and originated through French and Italian from the pre-islamic term sifr = zero - in Arabic صفر (see Zero Etymology).

$./about --contacts

You can reache me @: hey at

PGP/GPG public key available: 767BB67C

You can also find me on jabber and irc:

Here are the accounts with their OTR fingerprints: IRC

CA4F992C 56C1A912 5EF06865 6F4026C0 2CC052CE

5653525A E46F3B32 5FCFC110 0B65490D 425928ED Jabber

C6DE1978 28721810 F6FF21CC E91A4B26 2D468808

I am on the fediverse:

$ ./about --likes

I like: surfing, swimming, skiing, mountainering and hiking. I have got two dog and two cats. If we were still in the ’90s I would have displayed here my geek code.