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Closer Look at the Double Ratchet
In this post I try to explain the Double Ratchet Algorithm that drives the cryptography behind OMEMO and Signal. This is the second part of my series about the crypto behind OMEMO.
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Shaking Hands With OMEMO: X3DH Key Exchange
In this blog post I take a detailed look at how the Extended Triple Diffie-Hellman Key Exchange (X3DH) works. This algorithm is part of the cryptography that drives OMEMO.
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A look at Matrix.org’s OLM | MEGOLM encryption protocol
In this post I take a closer look on how matrix.org’s crypto protocols olm/megolm compare to the OMEMO protocol.
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Unified Encrypted Payload Elements for XMPP
An envelope hiding the original message – Image by Bru-nO This is a proposal to extract the element encryption principle from OpenPGP for XMPP to make it applicable to other encryption protocols.
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Future of OMEMO
OMEMO brought many new faces to XMPP. However, there is quite a lot of controversy around it. Part of it are technical discussions, others are more or less of a political nature. Let me list some of them for you.
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Summer of Code: Smack has OpenPGP Support!
I am very proud to announce, that Smack got support for OpenPGP for XMPP!
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Summer of Code: Finalizing the PR
Quick update: Only a few days are left until the last and final Evaluation Phase. I spent the week opening my pull request against Smacks master branch and adding a basic trust management implementation. Now the user is required to make decisions whether to trust a contacts key or not. However, the storage implementation is…
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Summer of Code: First PGPainless Release!
I’m very happy and proud to announce the first alpha release of PGPainless! PGPainless 0.0.1-alpha1 is the first non-snapshot release and is available from maven central. It was an interesting experience to go through the process of creating a release and I’m looking forward to have many more releases in the future 🙂 The current…
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Summer of Code: Plan for the grand finale
I passed the second evaluation phase 🙂 Now begins the final spurt, as the last month of GSoC has begun. My main goal can be summarized as follows: Get everything merged! To get that done, I have to polish up my smack-openpgp branch which has grown to a size of 7000 loc. There are still…
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Summer of Code: Second evaluation phase
Quite some time has passed since I bothered you with my last post 🙂 A lot has happened since, I have been making steady process in both smack-openpgp, as well as pgpainless. One big step that I took was to get rid of smack-openpgp-bouncycastle, which now has been merged into smack-openpgp. Having modular code may…