12
votes
Accepted
Address re-use and snapshot
You should never send iota to an address that was already spent. This will make it possible for an attacker to steal your iotas. This rule is uninfluenced by any snapshot.
The problem after a ...
- 791
10
votes
Accepted
Can someone explain very simplified how the Winternitz OTS/Lamport OTS works?
Simplified, Lamport One-Time-Signatures (OTS) work as follows. For illustration purposes I am using Bits and not Trits.
Assume you have a private key PRIV that consists of 100 (random) pairs of ...
- 1,663
4
votes
Why does IOTA use Winternitz signatures?
One of the reasons is quantum-security.
Traditional cryptocurrencies base their security on elliptic-curve cryptography. Classical examples of such algorithms are the RSA Cryptosystem, Diffie-Hellman ...
- 1,663
3
votes
Accepted
IOTA Winternitz Signature Scheme Details
All hashes in the signing function use Kerl.
We start from an 81 tryte subseed that is generated by taking Kerl(seed + index). This will make the subseed sufficiently independent so that it is ...
- 314
1
vote
What is the "main" reason for using Winternitz signatures?
Firstly, it is to be quantum-secure:
https://iota.stackexchange.com/a/1113/249
And secondly because there aren't many alternative quantum-secure signature schemes to begin with:
https://iota....
- 1,663
1
vote
How to get iota out of an address that has already been used twice?
How to get iota out of an address that has already been used twice?
use the CLI wallet https://github.com/iotaledger/cli-app to avoid the "key reuse" error
Is it possible to get IOTAs safely out ...
- 197
1
vote
Address re-use and snapshot
The seed itself is still safe to use, the one time signature weakening occurs only for that specific address (you leak part of the private key "paired" with the address itself, not part of your seed).
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