mta-hashcash September 2017

mta-hashcash@lists.lysator.liu.se

1 participants
4 discussions

Updated draft. MTA identification?
by nisse＠lysator.liu.se 24 Jun '26

24 Jun '26

I've updated the draft now (see http://www.lysator.liu.se/~nisse/misc/draft-nisse-hash-cash.txt), trying to address the issues raised by Simon and during the meeting. It now uses per-MTA keys. Then an important question is how an MTA is identified. Ideally, all border-MTA-s belogning to the same administrative domain should have the same identity (except perhaps secondaries). It's not clear if a mail server that accepts mail for multiple domains should have a single id, or one id per domain. I tried to write this down in section 4. Do we need new terminology for the things we identify? It's slightly confusing to say "MTA" when we are talking about not a single mail server, but a fuzzy group of them? Other notable changes: Authentication means signing a challenge string, of the same form as the hash cash challenges. Hash cash challenges now use hmac-sha1, with the string to be search for in the key argument, in order to make the construction somewhat more cryptographically sound. Most of the text on name-key semantics is deleted. /Niels

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Personal
by Peter Danher Deng 27 Sep '17

27 Sep '17

My name is Peter Danher Deng , I am a native of South Sudan in North Eastern Africa, but presently lives in exile in South Africa due to the recent political crisis that engulf the country. I was a junior Cabinet Director at the Ministry of Petroleum and Mining but got my post through a senior political associate who has also fallen out with the present regime in South Sudan. During my term as a political appointee, I made substantial income through a number of business transactions involving tenders and bids for the exploration rights to some solid mineral resources in various parts of the country. I am now willing to invest the funds in question privately through a reliable investor and trustee. On the acceptance to receive the funds as investment loan / capital, we will draft a mutual agreement and MOU to finalise the business association. However I prefer to remain a silent partner/investor as I do not want to be directly involved in the day-to-day running of the likely venture and projects the funds may be invested into. Please note that all information pertaining to this proposal remain strictly confidential until a formal acceptance of this offer. I am looking forward to receiving your favourable response. Sincerely, P D Deng

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mta-hashcash September 2017