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Questions tagged [signing]

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3
votes
1answer
41 views

Adress reuse with zero value transactions

If I send multiple zero value transactions from address A, containing several messages to broker a deal, is it safe to (re)use that address later on for a payment (to settle the deal)?
2
votes
0answers
28 views

Credits for the Pub/private key pair generation design in IOTA

I have understood that IOTA uses a constant Seed and a variable index to generate Winternitz private and keys, to sign transactions. PK^-1 = Hash (Seed + index) So we can have practically endless PK ...
5
votes
0answers
89 views

How to sign a data transaction?

I am wondering if it is possible to sign a data transaction, i.e. generate a signed bundle whose inputs have a balance of 0. If so, how could I construct such a bundle? I am asking because I would ...
1
vote
0answers
59 views

Transfer from Multisg into normal address

I am following the example described here: https://github.com/iotaledger/iota.lib.java/blob/master/jota/src/test/java/jota/IotaMultisigTest.java I put funds into a multisig. Now I want to move that ...
1
vote
1answer
45 views

IOTA Multisig with one Signer

What happens if Alice creates a multisig transfer to Bob's address but she is the sole co-signer. I presume Bob will see the transaction but will not receive the funds until Alice spends the input by ...
3
votes
1answer
423 views

IOTA Winternitz Signature Scheme Details

IOTA uses Winternitz one time signature scheme (W-OTS). Page no 45 W-OTS uses one-way function f and cryptographic hash function g. W-OTS selects parameter w > = 2, which is number of bits to be ...
5
votes
1answer
123 views

Why does IOTA use a post-quantum signature scheme?

There is an existing question about why Iota chose their specific post-quantum signature scheme. But my question is, why use a post-quantum signature scheme at all? Were the motivations discussed ...
12
votes
1answer
148 views

How does the coordinator sign milestones without compromising the private key?

All milestones are just signed transactions with teh address KPWCHICGJZXKE9GSUDXZYUAPLHAKAHYHDXNPHENTERYMMBQOPSQIDENXKLKCEYCPVTZQLEEJVYJZV9BWU. My understanding is that to sign a transaction, you do ...
8
votes
0answers
171 views

Why does IOTA use a post-quantum cryptography algorithm that has non-reusable keys?

What is the advantage of using winternitz signatures over other post-quantum cryptography schemes? Particularly, what is the disadvantage of a lattice-based scheme or a supersingular elliptic curve ...
5
votes
2answers
540 views

Can one send a zero value transaction from any address to any address?

Since zero value transactions do not require a signature, I assume one can send 0 value tx from any address, even if he does not own the corresponding seed. Is this assumption correct?
7
votes
2answers
185 views

How is ensured that a message sent in a transaction is immutable?

Zero value transactions can send a message instead of a signature, using the transactions signatureMessageFragment. However, as far as I understand the mechanism, only value, currentIndex, lastIndex, ...
4
votes
1answer
121 views

Attach to Tangle Transaction

The "attach to tangle"-transaction is a special zero value transaction to attach a newly generated address to tangle. The "attach to tangle"-transactions contains signatures such as following ...
10
votes
1answer
251 views

Why are the 50% I reveal when signing random?

Assumptions You reveal exactly 50% of your private key with the signature of a transaction. What part you reveal is random. (What information is leaked if I reuse an address?) Is this correct? The ...
6
votes
1answer
81 views

Which parts of a bundle have to be signed?

I understand that a bundle consists of input and output txs like in this example. Does a signature always need two txs and why? Because it's too big? Which parts of a "value transacting bundle" are ...