From eugen@leitl.org Thu Sep 19 07:00:28 2013 From: Eugen Leitl To: cypherpunks@lists.cpunks.org Subject: Re: [liberationtech] "Ibis: An Overlay Mix Network for Microblogging" by Ian Goldberg Date: Thu, 19 Sep 2013 13:00:24 +0200 Message-ID: <20130919110024.GX10405@leitl.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============3404853303928234128==" --===============3404853303928234128== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable ----- Forwarded message from Steve Weis ----- Date: Wed, 18 Sep 2013 21:50:45 -0700 From: Steve Weis To: liberationtech Subject: Re: [liberationtech] "Ibis: An Overlay Mix Network for Microblogging= " by Ian Goldberg Reply-To: liberationtech It was an interesting talk. The gist is that they've shrunk the overhead of the Sphinx mix net ( http://research.microsoft.com/en-us/um/people/gdane/papers/sphinx-eprint.pdf) to 47 bytes. They've done this by removing the requirement for message replies and using curve25519 for ECC. They've also encoded ciphertext with CJK characters to make up most of the 47-byte overhead and let you post close to 140 ASCII characters. That lets them use Twitter as a medium for mix net messages. Users will encrypt messages using a chosen path of Ibis mix net nodes, label them with a hash tag, and either tweet the encrypted message or send it directly through an Ibis node IP address. Ibis nodes will watch for messages with specific tags. When they detect them, they'll decrypt a mix net layer and pass them along to the next node. The final node will post the payload as a retweet. They are still trying to push through a security proof for the paper before posting it, along with a command-line client. I think Ian Goldberg said it would be up at http://ibis.uwaterloo.ca. On Wed, Sep 18, 2013 at 7:09 PM, Tom Ritter wrote: > This looks interesting! Am I being dense, or is there a paper or > slides or anything somewhere non-Stanfordites can read? > > -tom > -- > Liberationtech is public & archives are searchable on Google. Violations > of list guidelines will get you moderated: > https://mailman.stanford.edu/mailman/listinfo/liberationtech. > Unsubscribe, change to digest, or change password by emailing moderator at > companys(a)stanford.edu. > --=20 Liberationtech is public & archives are searchable on Google. Violations of l= ist guidelines will get you moderated: https://mailman.stanford.edu/mailman/l= istinfo/liberationtech. Unsubscribe, change to digest, or change password by = emailing moderator at companys(a)stanford.edu. ----- End forwarded message ----- --=20 Eugen* Leitl leitl http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://ativel.com http://postbiota.org AC894EC5: 38A5 5F46 A4FF 59B8 336B 47EE F46E 3489 AC89 4EC5 --===============3404853303928234128== Content-Type: application/pgp-signature Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="signature.asc" MIME-Version: 1.0 LS0tLS1CRUdJTiBQR1AgU0lHTkFUVVJFLS0tLS0KVmVyc2lvbjogR251UEcgdjEuNC4xMiAoR05V L0xpbnV4KQoKaVFJY0JBRUJBZ0FHQlFKU090bElBQW9KRVBSdU5JbXNpVTdGVEVvUC9qUmVtTnJW aHV0OXdUVEhUZ0tRNWRmMApFeDhxZW9zOG1BempKcEtFYU5xU0pNcTRoQkt1Y053cXpTdHFXMEVG eUhGbmx0RGI3Vjd3citxMnM3TWZKUFZPCmp6V2NzMitDTFZoZ2hiTzNKRDZCdlZFanNxU1lvM2dr ZWVMYjFIOTJmamcxR3I2MzhCRDBIbDJBWFlONlZFbW8KNi9CU2hqWGhCOVhOK0hHQldjZ2Z3cGdr bHVDZnRxYTNBVmduYjk2ck1kMTFNU0VFeGZWVEtrMTlQeVVUb1NBNgpsSnJRa0dZZkxBMGNvQnh3 U3lBaU5sbzBLdnk2b1V6V3JZR1VnRE91RUZJemtiUGxXbDRmQ0tHcG9BWHJpQ3VhCnNNNUtMTEQ4 em0vL1p2ekZJaGxMQ01QZDdteFM1WldhengvQ3kyWjRFTEM4S29XbXE5dWZ3Z2RKVkZxZnhyV0oK MG9mb3htNVlkbjBFblZoRjJXRlNuUWw1VUJDNy9iWGVoNnYzV25xM2ZRKzRkbFh2TUJNMFkxQzB2 QTJ2YUpGRApYbmpib2lkNVpGcThGb2Y1UlB0a1pvL2F3cmJRTXZVbnhhTC9wTWVBOXZOR214U3V5 U3JaNXdhQWpFRFN2WGVYCk9IUG9yU2I5eDVmQTRkWGJIQ2RCNXdCTFNobE01ZVY1RzRIMU5hclBK aUYxcFd6TlMwVGxxSng4Q1dUUkZIKzMKVjZzSjVXdi85akZnRitwTFBLRXdvN3ZVc2I0M0VqWmVU REVJM2t2cXlFdG5yTk9yNTg1TStPVzV2Wmx1ZlpWagpVUVJsaXpHeHdtdE0wSjNYSTB3WGhTN2g3 UHFTY0E5VGlNTHFMcG5mYlRyNnptWXA4SE1UZVlrdlluc0x4d05JCkZ2UTBSWmliZXdFbVJzK0Np TEZaCj11M050Ci0tLS0tRU5EIFBHUCBTSUdOQVRVUkUtLS0tLQo= --===============3404853303928234128==--