How about using ECC point multiplication and AES:
[...]
I like this scheme more because it allows to efficiently encrypt messages of arbitrary sizes.
It's indeed much more efficient Just out of curiosity, is it possible to tweak this a bit to make the sender unable to read the crypted message? What do you mean? Sender must know the message it is about to send. I was thinking about the private key s. The computer I'm using everyday should be safe but I wouldn't trust it for something risky. If I use your method, the computer may keep s somewhere (HDD, RAM, bash history, etc) and if it's compromised the attacker might be able to retrieve it and decrypt the message. Now that I'm writing it I realize that the same goes for the message and the random N... |
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Lol wtf am I looking at? Do you really have a 3-character long password? Change it immediatly FFS! |
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How about using ECC point multiplication and AES:
1. Get recipient's public key R (R = r*G, r is private key)
2. For each message, generate unique keypair S,s: S = s*G.
3. Create a shared secret: K = R*s
4. Compute 256-bit encryption key out of that shared secret: key = SHA256(SHA256(K))
5. Encrypt the message with that key and send the message together with unique pubkey S.
6. Recipient gets the message and computes key using his private key r and S: key = SHA256(SHA256(r*S))
7. Recipient's key turns out to be the same because r*S = R*s = r*s*G.
I like this scheme more because it allows to efficiently encrypt messages of arbitrary sizes.
It's indeed much more efficient Just out of curiosity, is it possible to tweak this a bit to make the sender unable to read the crypted message? |
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What is a cyryptocurrency?
A bug! And a typo! ha. Will fix that to 'Cryptocurrency' here is test output from your sig address: Address : 19QkqAza7BHFTuoz9N8UQkryP4E9jHo4N3
Cryptocurrency: Bitcoin BTC, Freicoin FRC, Terracoin TRC, Devcoin DVC
VERSION
ADDRESS HEX DEC TYPE
---------------------------------------------------------------
19QkqAza7BHFTuoz9N8UQkryP4E9jHo4N3 0x00 0 Bitcoin BTC, Freicoin FRC, Terracoin TRC, Devcoin DVC
YkMpHHrpMk8HLx5AnTntt8m1ZV6LrjKMT 0x01 1
x5xoPb9XYD16n6ACCo7P1QYe4k352c2vM 0x02 2
2MRZnVtSEifsvDEFDd8Rs8gLGZzysC7bdy 0x03 3
2kmAmcBiwu8kjeNLF3TkMFx7u5FvUkeAWL 0x04 4
3A6mkiV1f5bdZ5WRGTo4qPDuXaWsCSszR9 0x05 5
3ZSNjpnJNG4WNWeWHt8PKWVhA5motxzFRc 0x06 6
3xmyiw5b5SXPBwnbKJThodmUnb2khvP4P4 0x07 7
4N7ai3NsnczG1NvgLio2Hm3GR6HhKqYPiC 0x08 8 Novacoin NVC
4mTBh9gAVoT8pp4mN98LmtK43bYe6b9sZi 0x09 9
5AnngFyTCyv1eFCrPZTfG1aqg6oaooo12n 0x0a 10
5a8PfNGjvANtTgLwQynyk8rdJc4XSydKdu 0x0b 11
5yTzeUa2dLqmH7V2SQ8JEG8Qw7KUCXcPQp 0x0c 12
6NobdasKLXJe6Yd7TpTciPQCZcaQx54suV 0x0d 13
6n9CchAc3hmWuymCVEnwCWfzC7qMb64pU3 0x0e 14 Feathercoin FTC
7BUoboTtktEPjQuHWf8Fgdwmpd6JLzzqcY 0x0f 15
7apQaumBU4hGYr3NY5TaAmDZT8MF2ZxAN5 0x10 16 Junkcoin JKC
7zA1a24UBFA9NHBTZVntetVM5dcBkPaRex 0x11 17
8PVcZ8MktRd2BiKYav8D91m8i8s8V8bw3A 0x12 18 Bytecoin BTE
8nqDYEf3bc5u19TdcLTXd92vLe85AunVEH 0x13 19
9CApXLxLJnYmpabidknr7GJhy9P1vu8F4Q 0x14 20
9bWRWTFd1y1ee1jofB8AbPaVbedxfM4tcP 0x15 21
9zr2VZYuj9UXTSstgbTV5WrHE9tuK5oCEb 0x16 22
AQBdUfrCSKwQGt1yi1noZe84rf9r3Wn6y3 0x17 23 Anoncoin ANC, Argentum ARG
AoXETn9V9WQH6KA4jS883mPrVAQnnaNmyv 0x18 24 Doubloons DBL, Americancoin AMC
BCrqStSmrgs9ukJ9krTSXtfe7ffjWN8Afa 0x19 25 Bitbar BTB, BBQcoin-Testnet
BcCSRzk4ZsL2jBSEnGnm21wRkAvgCSoeD5 0x1a 26
C1Y3R73MH3nuYcaKoh85W9DDNgBcvZeekZ 0x1b 27
CQseQDLdzEFnN3iQq7TPzGV11BSZbH2ico 0x1c 28 CHNCoin CNC, Copperlark CL
CpDFPKdvhQifBUrVrXniUPkndghWGngEP4 0x1d 29
DDYrNRwDQbBXzuzasx82xX2aGBxSztekJZ 0x1e 30 Digitalcoin DGC
DctTMYEW7meQpM8fuNTMSeJMthDPkP2zFp 0x1f 31
E2E4LeXnpx7HdnGkvnnfvma9XCULPd6iXA 0x20 32 GLDcoin GLD, Norbit
ERZfKkq5Y8aATDQqxD7zQtqw9hjHCFQ3Me 0x21 33 EZCoin EZC, Elacoin ELC
EpuGJs8NFK33GeYvydTJu27inCzDrk6uPv 0x22 34 Emerald EMD
FEEsHyRexVVv65h213ndP9PWQiFAaaJrRr 0x23 35 Frankocoin FRK, Florincoin FLO
FdaUH5iwffxnuWq72U7wsGfJ3DW7JZAq24 0x24 36
G2v5GC2ENrRfiwyC3tTGMPw5fim3vyMYF9 0x25 37
GSFgFJKX62tYYP7H5JnaqXCsJE1zhh7n23 0x26 38 Gamecoin GME
GqbHEQcooDMRMpFN6j7uKeUevjGwMsX3jd 0x27 39
HEvtDWv6WPpJBFPT89TDomkSZEXtASqDWH 0x28 40 Hypercoin HYC
HeGVCdDPDaHAzgXY9ZnYHu2EBjnpqoYHaZ 0x29 41
J3c6BjWfvkk3p7fdAz7rn2J1pF3mX7AiMP 0x2a 42 Memecoin MEM
JSwhAqoxdwCvdYoiCQTBG9ZoSkJiFgHMDt 0x2b 43
JrHJ9x7FM7foSywoDpnVkGqb5FZez1J31o 0x2c 44
KFcu94QY4J8gGR5tFF7pEQ7NhkpbiDXxJq 0x2d 45
KexW8AhpmUbZ5rDyGfT8iXPALG5YMfrHrL 0x2e 46
L4J77H17Uf4RuHN4J5nTCeewxmLV82uzXJ 0x2f 47 Luckycoin LKY
LTdi6PJQBqXJiiW9KW7mgmvjbGbRqBTUmx 0x30 48 Litecoin LTC, Stablecoin SBC
LryK5Vbgu1zBY9eELvT6AuCXDmrNXzBPyG 0x31 49
MGJv4btycCT4ManKNLnQf2UJrH7KCjido6 0x32 50 Mincoin MNC, Megacoin MEC
MfeX3iCGKNuwB1vQPm7j99k6UnNFx7eU2G 0x33 51
N4z82pVZ2ZNozT4VRBT3dH1t7HdCdxcpvJ 0x34 52 Namecoin NMC
NUKj1vnqjjqgotCaSbnN7QHfjnt9LzcvzH 0x35 53 Nibble NBL
NsfL1368SvJZdKLfU27gbXZTNJ965jBTCL 0x36 54
PGzvz9PRA6mSSkUkVST15eqEzoQ2j8qWnb 0x37 55 PPCoin PPC
PgLXyFghsHEKGBcqWrnKZn72dJeySfpGze 0x38 56 Phenixcoin PXC
Q5g8xMyzaThC5ckvYH7e3uNpFouvANMEs3 0x39 57
QV1jwUHHHeA4u3u1ZhSxY2ebtKArxx86b4 0x3a 58
QtMLvaaZzpcwiV36b7nH29vPWpRoaUs2xP 0x3b 59
RHgwugsri15pXvBBcY7bWHCB9KgkKDS2fp 0x3c 60 Royalcoin RYC, Realcoin REC, UScoin USC
Rh2YtoB9RBYhMMKGdxSuzQTxmpwgzxmp8Z 0x3d 61
S6N9suUS8N1aAnTMfNnEUXjkQLCdjbjJDh 0x3e 62 Smallchange SMC, Sexcoin SXC, Dragoncoin DNK, Supercoin SPC
SVhks1miqYUSzDbSgo7Yxf1Y2qTaUiksGk 0x3f 63
Su3Mr851YiwKoejXiDSsSnHKfLiXBXn4FP 0x40 64
TJNxqENJFuQCd5scjdnBvuZ7HqyTu3VwX1 0x41 65
ThiZpLfay5s5SX1hm47WR2ptvMEQe2bJbT 0x42 66
U74AoSxsgGKxFx9nnUSpuA6gYrVMNNJNQc 0x43 67
UWPmnZGAPSnq5PHsotn9PHNUBMkJ2Hh6YW 0x44 68
UujNmfZT6dFhtpRxqK7TsQeFos1Ei9JFsL 0x45 69
VK4ykmrjooiaiFa3rjSnMXv3SNGBSBtc9A 0x46 70
ViQajtA2WzBTXgi8t9n6qfBq4sX89bhhXP 0x47 71
W7kBizTKEAeLM7rDua7RKnTchNn4pFKC79 0x48 72
WX5ni6kbwM7DAYzJvzSjoujQKt31Z8EMr9 0x49 73 Worldcoin WDC
WvRPhD3teXa5yz8PxQn4J31BxPHxHWR44v 0x4a 74
XKkzgKMBMi2xoRGUyq7NnAGyatYu3NWmgT 0x4b 75
Xj6bfReU4tVqcrQa1FShGHYmDPoqmXjEt8 0x4c 76 XenCoin XNC
Y8SCeXwkn4xiSHYf2fn1kQpYqu4nRBnwWW 0x4d 77 Yacoin YAC
YXmodeF3VFRbFigk467LEY6LUQKjAm5Fan 0x4e 78
Yw7QckYLCRtU59pq5WSeifN86uafpeLUes 0x4f 79
ZLT1brqcucMLtaxv6vmyCndujQqcYi5TJN 0x50 80
Zjncay8ucnpDi2718M7HguuhMv6ZFv6LQX 0x51 81
a98Da5SCKyH6XTF69mScB3BUzRMVx2KhMr 0x52 82 Alphacoin ALP
aYTpZBjV39jyLtPBBBmvfATGcvcSe3nTUp 0x53 83
awoRYJ2mkLCrAKXGCc7F9Hj4FRsPMQR3aP 0x54 84
bM92XQL4TWfiykfME2SZdQzqsw8LAY85e1 0x55 85 BBQcoin BQC
bkUdWWdMAh8boBoSFSmt7YGdWSPGsAWuwu 0x56 86
c9pEVcvdssbUccwXGs7CbfYR8weDXYY8SM 0x57 87
cZ9qUjDvb44MS45cJHSX5npCmSuAHWssyp 0x58 88 Coiledcoin CLC
cxVSTqXDJEXEFVDhKhmqZv5zPxA6zqg539 0x59 89
dMq3SwpW1Qz74vMnM87A43Mn2TR3dnwvvx 0x5a 90
dmAeS47nibSytMVsNYSUYAdZexfzR2XtEQ 0x5b 91
eAWFRAR5RmurhndxPxmo2HuMHTvw968MDk 0x5c 92
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movi8E5YvCiWF2Hbrw6rEg5JF3preHHWf3 0x6f 111 Bitcoin-Testnet BT3
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2bh9VJ9YqQfrmZbsumrjmwbTv95V7BieKyT 0xe6 230
2c6V6HFr87rKeP31zoH56Rijhmak3rgyRtX 0xe7 231
2cVphGN9Qq2nXCUA5phQQur1VQ5zzZwN3Xv 0xe8 232
2cuAJFUShYDFQ1uJAr7jjPyHH2bFwP6Zx81 0xe9 233
2dJVuEajzFPiGqLSFsY53t6Z4f6Wt5goYnQ 0xea 234
2dhqWDh3GxaB9emaLtxQNNDprHbmphbsH6S 0xeb 235
2e7B7CoLZfke2UCiRvNjgrM6dv72mRC8B6v 0xec 236
2eWWiBudrNw6uHdrWwo51LUNRYcHiB5a2Eb 0xed 237
2eurKB1w967Zn74zbyDQKpbeDB7YevtTsm4 0xee 238
2fKBvA8ERoJ2evW8gzdjeJiuzocobYzKLyc 0xef 239
2fiXX9EXiWUVXjwGn244xnrBnS84YG62CKV 0xf0 240
2g7s88Lq1DexQZNQs3UQHGyTa4dKV1J1XHL 0xf1 241
2gXCj7T8HvqRHNoYx4tjbm6jMh8aRikPSWP 0xf2 242
2gvYL6ZRae1tACEh36K4vFE19KdqNUDEieQ 0xf3 243
2hKsw5fisMCM31fq87jQEjMGvx96K8VRRNH 0xf4 244
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2mkbZus13ABSg1SN5PM4k4jGasgvgvPWRVs 0xff 255
Indeed, I have the same thing Great job, that's doing things like this that we understand how Bitcoin works |
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I'm not a programmer so it's difficult to understand this without seeing a proper mathematical description of the encryption and decryption methods.
If it uses elliptic curves then I doubt if you have reinvented EIGamal crypto system.
There are hybrid cryptosystems based on elliptic curves such as ECIES but the plain text is not required to be a point on the curve.
The problems of using elliptic curve implementations of EIGamal rather than discrete logarithm implementations relate to message expansion factors and difficulties of deterministically generating points on the curve which is why hybrid solution such as ECIES are used.
Generally I would say that home made crypto systems should be approached with caution. There are plenty of good crypto systems out there.
Let's say I want to encrypt 'hello' to your address pubkey: your public key
privkey: your private key I split my message in 32-char long chunks and put "0x00"s at the end of the last one to make it 32-char long too. That gives here only one chunk: 'hello---------------------------'. ('-' represents one 0x00) Now each chunk is used as an X. Let's call the correponding point M (Two M's are possible but it doesn't matter as I never use Y) Then I take a random N and calculate: Those points are the encrypted data to be sent to the recipient. As pubkey=privkey*G, M is easily calculated. Note: Not all X values leads to a point on the EC. In such cases I just use offsets. |
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What is a cyryptocurrency?
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Way better than that vid he posted
Yet you took it down |
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Anyway, photos will surely help...
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So, if one gets smashed to pieces in an unfortunate dance-it-out incident, do the Bitcons stored on the wallet get lost?
No they use BIP 32 and a randomly generated pass phase which you have to write down and keep a secret. That makes sense, thank you. Will there be a published algorithm to convert the pass phrase into the the private key, or the only way to restore a lost wallet with pass phrase is by purchasing the same model of hardware wallet? BIP32 is published |
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Looks like this is it, thanks
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I figured it out. The problem is in input format, file should contain key;label, not just key
Do you think I should clearly write the format instead of showing it while hovering? I figured it out. The problem is in input format, file should contain key;label, not just key
oh cool. as far as i can tell my addresses are there because when i dump in pywallet they show up, they just arent recognized because i imported them and the blockchain hasn't finished dl'ing yet. my addresses are all less than a few months old and i'm still behind nearly a year on the blockchain. maybe tomorrow it will all be dl'd and i will se if they show up then. Do you see them in the corresponding tab in bitcoin-qt? well, today i'm behind 4 weeks on the blockchain. so far two addresses have showed up in the recieve tab where it shows your addresses. when the blockchain finishes dl'ing, i will rescan again and see whats changed. i really hope this works because after i imported my private keys from electrum i deleted electrum and all of its files from AppData. got my fingers crossed. If they are shown in bitcoin-qt you are safe |
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Hey all
I'm looking for the file where the transactions signatures are done, I can't find it. I'm rather bad at looking through the c++ code of bitcoin-qt
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it will be mass consumer adoption
Yep, surely |
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F9cTwJbkCNz84u7oSbR3DVhneQXP3MJLTy
Thanks
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There hasn't been much happenings with Devcoin
Are you kidding? Lying? Stupid? |
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Come to France, we don't have sun, we have floods instead |
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GUI MINER CRASHING! Solution?
Looks like your caps lock is broken too |
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this thread is pointless till he explains what he said.
Did you say you love her??
No, but it's true that what I said kind of made the girl rethink the situation and ask me to be just friends, but at first she said she was OK with what I said then 5 minutes later(literally) she sent me to the friendzone. Looks like YOU sent yourself to friendzone Possibilities: 1. Tell us what you said 2. Tell us you don't want to tell us that |
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How do you know my IP!? What FTP witchery are you using on my computer? |
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