$102,983.00
3.49%$2,296.77
4.98%$2.05
3.80%$629.66
3.36%$138.91
6.47%$0.999905
0.01%$0.272466
3.31%$0.157139
5.19%$2,292.11
4.86%$0.552695
3.91%$102,856.00
3.39%$37.29
9.85%$2,769.42
5.11%$453.15
0.79%$2.58
7.56%$9.07
1.14%$12.05
5.35%$0.234415
4.65%$17.18
6.36%$0.999957
0.02%$2.84
4.36%$47.90
-0.09%$0.00001116
7.26%$82.65
4.93%$0.999473
-0.06%$2,297.36
5.05%$2,460.09
5.18%$0.141324
8.40%$1.001
0.10%$300.37
1.16%$3.28
3.12%$103,011.00
3.47%$4.06
1.95%$0.00000928
6.78%$0.515325
6.73%$6.42
4.54%$237.22
7.72%$1.18
0.04%$50.93
3.37%$1.00
0.00%$321.11
6.96%$4.08
5.66%$1.056
0.04%$4.71
5.10%$0.081073
1.89%$168.24
6.62%$1.99
7.41%$15.81
5.56%$0.99968
-0.09%$0.693587
7.17%$27.35
0.29%$16.44
5.11%$0.588659
1.06%$4.44
-0.07%$0.068209
10.64%$3.91
6.13%$8.87
4.01%$0.02007895
6.33%$103,296.00
3.81%$0.078296
11.06%$0.6145
8.59%$0.174316
3.16%$0.246723
7.08%$2.90
7.40%$0.999599
0.27%$2.16
4.28%$4.27
3.38%$1.00
0.04%$0.167779
7.24%$0.284671
8.43%$0.85451
6.93%$1.001
0.23%$2,295.54
4.79%$10.87
1.10%$92.11
3.83%$147.29
6.73%$0.213285
8.99%$1.18
8.37%$0.193156
11.54%$0.01637444
4.77%$0.368468
9.38%$2,615.17
5.08%$1.15
12.76%$2,406.88
5.11%$1.00
0.04%$0.00001291
8.05%$1.46
6.45%$0.999645
-0.28%$1.51
14.97%$10.06
8.74%$0.983613
14.42%$3.26
19.16%$0.293789
16.58%$1.00
0.07%$0.056499
1.57%$0.5163
8.55%$0.58807
8.17%$3,401.74
-1.29%$102,776.00
3.29%$2,455.18
5.02%$629.37
3.16%$2,412.22
5.10%$3,387.42
-0.94%$102,840.00
3.51%$104,620.00
6.52%$1.11
0.02%$2,418.41
5.18%$0.492453
5.71%$0.076468
6.16%$0.546574
5.44%$0.393982
11.20%$0.732549
10.91%$111.51
0.00%$155.13
6.52%$2.07
5.05%$181.08
6.56%$2.11
6.28%$0.796615
7.46%$0.999019
0.15%$1.13
3.32%$0.01014137
0.71%$0.00006717
8.37%$40.00
6.84%$2,478.99
4.98%$0.626527
6.69%$0.997923
0.04%$0.666969
3.96%$0.01324407
9.17%$29.92
2.56%$0.243407
7.11%$0.152984
6.22%$17.66
5.17%$1.94
6.15%$102,331.00
2.66%$0.219869
4.78%$0.00000058
3.84%$0.01166636
9.26%$0.00891979
11.40%$3.33
4.82%$102,718.00
3.24%$37.13
8.78%$0.510758
5.06%$0.394229
5.40%$0.090484
7.55%$1.94
7.72%$2,300.63
5.34%$0.505539
4.46%$2,297.09
5.06%$1.00
0.06%$0.315823
5.77%$103,092.00
3.24%$0.99967
0.18%$2,455.44
4.90%$0.449399
9.78%$0.24982
8.16%$2,388.54
4.13%$2,298.81
5.10%$0.581708
5.52%$0.01346938
4.74%$1.30
6.26%$0.417822
3.28%$7.83
1.10%$0.061124
0.22%$0.999906
0.01%$37.09
8.54%$0.999865
-0.02%$46.09
3.55%$0.161863
40.62%$1.001
0.06%$2.24
3.11%$1.091
0.04%$1.005
1.47%$0.156988
4.97%$0.0000004
0.64%$0.999641
-0.30%$1.23
9.60%$0.377468
-1.96%$0.03793296
8.44%$5.28
7.25%$2,295.15
5.18%$12.83
8.36%$0.0000182
4.35%$0.107896
8.75%$0.491873
5.74%$2,441.01
4.89%$2.16
7.76%$0.467231
8.55%$0.293034
11.61%$0.00597203
10.48%$0.0346701
7.84%$0.344314
4.91%$0.162668
-4.15%$0.00391744
13.43%$0.00000086
20.94%$0.065798
3.91%$0.893273
8.83%$1.16
4.52%$1.07
8.01%$5.04
8.62%$0.03376146
6.36%$0.323926
1.56%$1.34
8.16%$0.00350927
1.19%$2,535.03
5.15%$19.57
1.73%$0.016634
-0.01%$102,849.00
3.62%$103,274.00
4.76%$1.00
0.03%$0.999828
0.02%$0.999421
0.04%$0.999544
-0.13%$0.124384
14.48%$2,514.90
5.05%$151.03
6.33%$0.03027076
-0.78%$2,298.82
5.12%$0.00295716
8.83%$0.00005397
4.83%$9.84
3.18%$0.687578
3.70%$0.711397
34.97%$1.03
8.97%$0.426051
5.10%$104.71
4.96%$103,286.00
3.88%$2,295.59
5.11%$0.278924
13.46%$1.003
0.41%$0.00324079
4.99%$1.67
-1.97%$0.00000133
-1.03%$17.21
6.63%$0.057778
7.98%$1.017
0.11%$2,069.55
3.70%$0.567553
4.55%$0.174053
2.86%$97,817.00
1.86%$100,318.00
3.06%$0.00475115
7.38%$0.539273
11.75%$0.173472
7.01%$0.999836
0.01%$0.999514
0.02%$1.20
0.45%$14.05
5.36%$5.66
4.12%
Firo, the privacy-oriented cryptocurrency, has suffered a 51% attack, which resulted in the blockchain having to be significantly reorganized.
“We are under 51% attack at the moment. We recommend not to make transactions during this time until the network returns to a normal state,” the team revealed earlier on Wednesday.
Zcoin rebranded to Firo in November 2020 while continuing to utilize the same blockchain. Last week, an update called Lelantus was activated on Firo’s mainnet, bringing zero-knowledge proofs as part of the “on-by-default” privacy feature that ensures transactions sent by official Firo wallets stay hidden.
According to Changpeng Zhao, the CEO of Binance, the blockchain reorg was 306 blocks deep. “51% attack, 306 blocks rolled back, to 2021-01-18 17:24:20(UTC). Another messy situations,” said Zhao.
XZC(FIRO) 51% attack, 306 blocks rolled back, to 2021-01-18 17:24:20(UTC). Another messy situations.
— CZ 🔶 Binance (@cz_binance) January 20, 2021
Before the attack, the price of Firo soared to a five-month high of $7.10, only to crash by more than 15% afterwards. Currently, the coin is trading around $4.95.
The team is yet to share further details, though they’ve said that this is “not a coding error but a nature of PoW.”
Details of the attack shared on the project’s Telegram group showed the attacker orphaned the previously confirmed transactions, and the blocks mined by legitimate pools were catching up on those abandoned transactions.
According to the Firo team, the attack would be near to impossible had they already deployed Chainlocks, a secondary validation layer aimed at mitigating this type of attacks.
We are working with exchanges and pools currently. Chainlocks that would have prevented this were being tested on testnet and was weeks away from deployment.
— Firo (formerly Zcoin) (@firoorg) January 20, 2021
However, in a thread detailing the specifics of a reorg attack, Dr. Emin Gün Sirer, who is leading the Avalanche protocol project, insists that Chainlocks is only a “temporary” fix and can’t be “considered safe or sound.”
51% attacks are not anything new to cryptocurrencies relying on the proof-of-work consensus mechanism. As reported by Decrypt, Ethereum Classic went through several of such incidents last year.
Perhaps, Satoshi was right.
