Topic: [PRE-ANN] Tangram - Private, Secure & Anonymous focused DAG Cryptocurrency - page 11. (Read 26638 times)

I would love to participate in the alpha. I'm already a member of the Discord chat.

Hey guys,

Just a reminder tomorrow is the final day to be apart of the alpha 0.1 testing. If you haven't already signed up take a quick look at  and just post a reply that you'd like to be added. :thumbsup: and again thanks for all those that have signed up and for everyone whose gotten involved and given their support.

Check out: https://bitcointalksearch.org/topic/m.31570883

Regards,
Sneak

Seems to be a hard fought battle right now about who is going to be the first one publishing a working privacy focused DAG Cryptocurrency. Hopefully at least one project is able to deliver in 2018.

hey alice ;-),

Please check your wallet - https://etherscan.io/tx/0x8343285e211b1957ffcdc5f4eb51ab555690bed6e500432f0a7ad0160597f1e6

Ping back when you receive.

Thanks,
Sneak

Hi, I saw that you extended the Community Fund until it was maxed out, hopefully I am not too late! I donated to two projects below.

2.1: Stone (https://bitcointalksearch.org/topic/pre-ann-stone-dag-data-structured-private-cryptocurrency-2581762)
2.2: 0x4ce0650ec058449f8b936733b12e945e443ec1bd
2.3: https://etherscan.io/tx/0xf3367798a0b70c10d3380dbbb9d01fda14c3150ff3699cf9a1253138e640f86d

2.1: Manta (https://bitcointalksearch.org/topic/pre-ann-manta-dag-zksnarks-fast-fee-less-private-cryptocurrency-2696095)
2.2: 0x48ff0a6aecf2761c5db26d9c77832f0e1f2e45f9
2.3: https://etherscan.io/tx/0x23614a05c57170f7a787f0cd4bc45d99ae2ba49de2e4c9b35497d9b69bb3452a

Will wait for the ping and send it back from the address I receive it at, thanks!

Hi there2win,

It is still possible to contribute to Sneak. You can find the details on the original thread. FYI under the heading "Ways to support".

If any issues just give us a shout on discord.

Regards,
Sneak

Hi Sneak,

I’m excited for this coin and following you guys on discord. I would like to be an early adopter and donate money. Fortunately I wasn’t scammed into manta or stone, so I have no transaction history of donating to those coins. Can I donate to SNEAK and in return get SNEAK coins or am I too late? I thought I missed the time to do so.

Please let me know, or DM me.

I send back https://etherscan.io/tx/0xb805f38fa3cce60af17b543cda5cbbf462c7b42431c7ef3bd3ba48de1bbd2db6

Wouldn't be surprised if the method was very similar with a couple of modifications.

Why does this sound to me like what Paypal is trying to do with its recent patent on speeding up cryptocurrency transactions...

I am still waiting for my wallet to sync but in the meantime, I have sent 0.0001 nano back to your address from my wallet address.The transaction details are here:

https://www.nanode.co/block/8E0C894347BDEFCD1DCDF46226951A9793D403C016E5D861DC4D22C89B8AAC86

The SRP protocol

Part 3 is going to be a little more technical and we’ll provide you with the some of the important details to understand, but if your intrigued, curious and willing, take a look at the original Whitepaper - http://srp.stanford.edu/ndss.html.

The SRP protocol combines techniques of zero-knowledge proofs with asymmetric key exchange protocols and offers significantly improved performance over comparably strong extended methods that resist stolen-verifier attacks such as Augmented EKE or B-SPEKE.What follows is a complete description of the entire SRP authentication process from beginning to end, starting with the password setup steps.

Here’s a mathematical notation for SRP, in order to reference if you’re serious about reading further:




The values n and g are well-known values, agreed to beforehand.

*Moving forward use the notation above when symbols / alphabetic characters are being referenced.

To establish a password P with Steve, Carol picks a random salt s, and computes


Steve stores v and s as Carol's password verifier and salt. Remember that the computation of v is implicitly reduced modulo n. x is discarded because it is equivalent to the plaintext password P.

The AKE protocol also allows Steve to have a password z with a corresponding public key held by Carol; in SRP, we set z = 0 so that it drops out of the equations. Since this private key is 0, the corresponding public key is 1. Consequently, instead of safeguarding its own password z, Steve needs only to keep Carol's verifier v secret to assure mutual authentication. This frees Carol from having to remember Steve's public key and simplifies the protocol.

To authenticate, Carol and Steve engage in the protocol described in Table 4. A description of each step follows:




1. Carol sends Steve her username, (e.g. carol).
2. Steve looks up Carol's password entry and fetches her password verifier v and her salt s. He sends s to Carol. Carol computes her long-term private key x using s and her real password P.  
3. Carol generates a random number a, 1 < a < n, computes her ephemeral public key A = g^a, and sends it to Steve.  
4. Steve generates his own random number b, 1 < b < n, computes his ephemeral public key B = v + g^b, and sends it back to Carol, along with the randomly generated parameter u.  
5. Carol and Steve compute the common exponential value S = g^(ab + bux) using the values available to each of them. If Carol's password P entered in Step 2 matches the one she originally used to generate v, then both values of S will match.  
6. Both sides hash the exponential S into a cryptographically strong session key.
7. Carol sends Steve M[1] as evidence that she has the correct session key. Steve computes M[1] himself and verifies that it matches what Carol sent him.
8. Steve sends Carol M[2] as evidence that he also has the correct session key. Carol also verifies M[2] herself, accepting only if it matches Steve's value.


We’ve mentioned that the SRP protocol includes zero-proof of Knowledge (Elliptic Curve), how so?

Fortunately, the mathematical structure of the SRP protocol is sufficiently similar to the Diffie-Hellman (DH) protocol.

Attack vectors:

Resistance to the Denning-Sacco attack
Resistance to active attacks
Resistant to Subgroup confinement attack

The Case for optimising SRP (we need to optimise the performance in order to achieve one of our USP - speed of transactions).

If you recall Table 4 above, it described a total of 3 round trips between client and server. We are able to reduce the number of trips of a total of 2 OR 1 and a half which would only authenticate the client to the server.





Conclusion

1. An attacker with neither the user's password nor the host's password file cannot mount a dictionary attack on the password. Mutual authentication is achieved in this scenario.
2. An attacker who captures the host's password file cannot directly compromise user-to-host authentication and gain access to the host without an expensive dictionary search.
3. An attacker who compromises the host does not obtain the the password from a legitimate authentication attempt.
4. An attacker who captures the session key cannot use it to mount a dictionary attack on the password.
5. An attacker who captures the user's password cannot use it to compromise the session keys of past sessions.

It is believed that this set of properties is at or near the theoretical limit of security that can be offered by a purely password-based protocol. SRP, which bases its security on the difficulty of solving the Diffie-Hellman problem in the multiplicative field modulo a large safe prime, meets these requirements and does so using only one exponential key exchange round, making it useful for applications in which good performance is an issue. It solves some outstanding issues with protocols like EKE and SPEKE without sacrificing either performance or security. SRP's security, simplicity, and speed make it ideal for a wide range of real-world applications in which secure password authentication is required.

Original Whitepaper - http://srp.stanford.edu/ndss.html

Please check your wallet - https://www.nanode.co/block/3359160E402C0772866CA6C820FA007A3E2404EC2ADCF757476B7E271D6271E6

Ping back transaction.

Thanks,
Sneak

I think I qualify, I have contributed donations to 3 dag projects for a total of 170 nano. The details are as follows:

Stone 50 + 20 Nano

1st donation 50 Nano
2.1 https://bitcointalksearch.org/topic/pre-ann-stone-dag-data-structured-private-cryptocurrency-2581762
2.2 xrb_3my3e88nzaorkhcbho91seniswjz7ksiu1ddkuuu5ue3q8exiian9ikhja4g
2.3 https://www.nanode.co/block/4C2F6E91C418C4B57E89C8EA028F73F7BEC934A0674FCDD448D4B245DEEFE962

2nd donation 20 Nano
2.1 https://bitcointalksearch.org/topic/pre-ann-stone-dag-data-structured-private-cryptocurrency-2581762
2.2 xrb_3my3e88nzaorkhcbho91seniswjz7ksiu1ddkuuu5ue3q8exiian9ikhja4g
2.3 https://www.nanode.co/block/1FD7B66A4CC9486048CEB6FE05884B0B06E36F55FA7F33E400CF0C91E1423646

Manta 50 Nano

2.1 https://bitcointalksearch.org/topic/pre-ann-manta-dag-zksnarks-fast-fee-less-private-cryptocurrency-2696095
2.2 xrb_3spms1mkp84ij5o8zjkrhh7jk4ntd87jzfrk4raei3t79afxowgz91xadpsz
2.3 https://www.nanode.co/block/5BD34FE3E656AF62E4D4D7BDE7FE9BE5312BD0B1CB1D9DFE96B50B069C85784A

Azulik 50 Nano

2.1 https://bitcointalksearch.org/topic/pre-ann-azulik-adding-privacy-to-dag-fee-less-instant-transactions-2748094
2.2 xrb_1dtmp1g9rfkusja6ogpktazgt846kj4ett6afwowpu8xz6wq8kimergzkrug
2.3 https://www.nanode.co/block/8A34C02E58706EFF87817E1EF29B68FF048D091929C2328E13A95C4037B9F79A

I'm not sure what it is worth but I have also purchased stone tokens to more than double my holding to nearly 200 000. you can see my stone and manta tokens here:

https://etherscan.io/address/0x3b5ec7fbb2ff5ad6b327f5b66e4a374d4eb1fd4f#tokentxns

I would REALLY like to see one of these succeed or for you guys to succeed.

Whatever happens, I wish you guys the best.

Edit to add my nano wallet address that I sent the coins from is: xrb_3jyziuocqw5qsh78t7hief43eyrgb6tp6yf5n6odyxukz4rmw5fxwr37jfra

interested in testing

Thanks, just joined the Discord.

Hey Ari's, you're added, apologies for the link, strange as it was set to never expire. Nonetheless,

https://discord.gg/nygadJ9 or visit our site or original thread.

Interested in being an Alpha tester, but discord invite has expired.

Just as an FYI - we're keeping the Community Fun(d) open till the cap is reached! If you're new take a look.

I'm also interested if there are still slots left.