Mission Statement DeftA powerful high secured memory hard blockchain based on Stanford designed balloon hash will allow users to use the deft chain as a basic layer and deploy easily own parallel blockchains ( top-balloons) on the top of it and interoperate and collaborate between them, creating interconnected powerful secured blockchains (superclustered-balloons). The Codebase of the deft chain will upgrade to the newest Version 0.16 and instead of one hashing method, we will introduce five variants of the revised balloon512 algo, which can be mined concurrently for fair user experience.
IntroductionThe first cryptocurrency to implement the 'Balloon' memory-hard hashing function, superior in strength to Argon2, while remaining resistant to cache/side-channel attacks.
Additionally, the Balloon Hashing function does not require anywhere near as much memory to demonstrate its memory-hardness; making it possible for low-memory devices to verify hashes, an often overlooked but very important part of 'Proof of Work'.
What's a side-channel attack?A term quickly referred to but rarely understood by most; a 'side-channel' attack refers to an attacker being able to use data obtained indirectly from the machine performing the hashing, to weaken or defeat the actual protection provided by the hashing in the first place.
Any hashing algorithm should not be susceptible to this; as i) multi-user operating system environments have become wide-spread since the 1980's and ii) we should expect the attacker to be able to be on the same system (albeit without the same level of privilege) and gain no advantage over the protection the hashing algorithm offers.
Argon2 vs BalloonThis is the most often quoted comparison; however, it is not safe/fair to compare the two algorithms, at least in a 'Proof of Work' paradigm.
Most algorithms, including all variations of Argon2 (Argon2d/i/id), converted in this sense pass the block header as the 'password' and the 'salt', to the hashing algorithm; which isn't quite the ideal usage scenario in the minds of the algorithm authors, however, it is safer than having a static 'salt'.
In a purely 'password hashing' arena; it should be noted several fairly serious attack methods have been identified and trialed against Argon2, some of these same attacks were still resistant against Balloon Hashing. Additionally, the password-hashing competition doesn't define cryptographic/hashing standards, it serves as a platform to bring the concept out in the open.
Argon2 is still a worthy candidate against Balloon, shoulder to shoulder. Unfortunately, some of the best discussion/debate is no longer available (
http://gmane.org/details.php?group=gmane.comp.security.phc) due to abuse/being pulled offline.
Intriguing Benson, tell me moreThe original password hashing algorithm was developed by Dan Boneh, Henry Corrigan-Gibbs and Stuart Schechter (
https://crypto.stanford.edu/balloon/) and was submitted to the 'Password Hashing Competition' (
https://password-hashing.net/).
The password hashing algorithm was later modified for PoW use last year and gradually refined since; the latest iteration being very small (2 files only requiring openssl lib/headers) and quite easy to implement; whilst remaining easy to introduce different length inputs, memory and mixing parameters.
Another version is currently being written/tested (identical parameters, so will be 100% compatible) that removes the current version's reliance on the openssl library; while not being expected to be any quicker, it will then become 100% platform-independent/portable.
deft specificationsPoW algorithm Stanford balloon implementation (128kb per thread/4 mixing rounds of AES)Coin ticker DEFTCoin codebase Litecoin 0.15.1Retarget code Dual_KGW3 (with 3hr timeout)Retarget strategy Per blockBlock time 4 minutesBlock maturity 30 blocksBlock subsidy 8.5 DEFT per blockEmission strategy Starting off near zero, gradually increasing until 8.5 is reached by block 5000 (preventing instamining).Emission decay Block reward halves every 150,000 blocksEmission simulation Included in src folder as deftreward.c (gcc deftreward.c -o deftreward)Coin marketcap Maximum of 2.8 million DEFT (lifetime)Coin premine 250,000 DEFT = 100.000 DEV, 75.000 Co-Founder, 75.000 DEFT set aside for bounties, marketing and competitions)Reward Schedule2 0.0034 DEFT1471 2.5 DEFT2941 5. DEFT5000 8.5 DEFT152500 4.25 DEFT302500 2.125 DEFT452500 1.0625 DEFT602500 0.53125 DEFT752500 0.265625 DEFT902500 0.1328125 DEFT1052500 0.06640625 DEFTLinks/further readingGithub http://github.com/deftchain/deftWin/MacWallet https://github.com/deftchain/deft/releasesMiner https://github.com/deftchain/cpuminer-balloonPool module https://github.com/deftchain/balloon_hash.gitPool Statistics https://deft.leafpool.com/Discord https://discord.gg/M2RwYXBBlock Explorer https://deft.ccore.online/Website https://devsheaven.com/deft/Balloon webpage https://crypto.stanford.edu/balloonOrig balloon code https://github.com/henrycg/balloonBalloon Whitepaper https://eprint.iacr.org/2016/027.pdfTwitter https://twitter.com/DeftChainTelegram https://t.me/deft_chainReddit https://www.reddit.com/r/DEFTExchangesCrex24 - Disabled https://crex24.com/exchange/DEFT-BTC
qtrade.io - Enabled https://qtrade.io/market/DEFT_BTC
Pool: Leafpool
https://deft.leafpool.com/
cpuminer.exe -a balloon -o stratum+tcp://mine-deft.leafpool.com:6611 -u YOUR_DEFT_ADDRESS_HERE -p x -q
Translations, signature campaigns
Please note that while we will offer bounties/competitions in the future, we will not ask/request for translations, signature campaigns as we feel these sorts of thing (while well-intentioned) are tacky/cheap. If you'd like to translate in a language we don't support; feel free to submit and we will include it (for free).
We have several ideas in mind for interesting and unique bounties; so stay tuned.
addnode=172.31.40.27
addnode=173.254.207.158
addnode=88.198.100.225
addnode=206.189.154.133
addnode=209.97.172.77
