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Questions tagged [security]

For questions relating to the security of IoTA and how to mitigate these issues or avoid them altogether.

1
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1answer
36 views

Cracking seed with list of addresses and indexes

I have an open source offline airgapped encrypted device for signing transactions. Seeds are stored on this device. Signed transactions are passed to an online machine as a parade of qr-codes for ...
2
votes
1answer
23 views

Does Broadcasting a Bundle on Both MainNet and TestNet Facilitate Brute Forcing the Seed?

I have made an open source airgapped device for signing bundles offline. A main purpose is to address the possiblity that the components we use to make our devices are already compromised before ...
0
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0answers
26 views

Kerl Hash Function: why is the squeezing phase modified?

I was studying the cryptographic "evolution" of IOTA from Curl to Troika and I noticed something in Kerl hash function. Kerl is an adaptation of Keccak384 which works with trits but it introduces ...
2
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2answers
134 views

Sybil attack with IOTA?

The solutions to attacks proposed by IOTA white paper seems unclear, in particular, in case of double-spending, it remains unclear what stops a computationally powerful adversary from conducting a ...
3
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0answers
66 views

Is MAM encrypted message has perfect secrecy?

Here I am referring to MAM in restricted mode, where side key is used to encrypt the message. One time pad is known for perfect secrecy. Since MAM uses the one-time pad, is MAM encrypted message has ...
2
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0answers
24 views

what happen if we are in an untrusted network [closed]

I am discovering Iota and I am trying to find out if I it can be applied to securely send command between iot device, being 100% sure the command has been received. My concern is about the network, ...
3
votes
1answer
58 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)?
3
votes
1answer
103 views

How does the IOTA Foundation determine if a spend is a typo or a real spend?

According to Come-From-Beyond in the emails send to DCI: The Coordinator is used as an extra protection measure. Particularly, it stores all transactions that reach it, this allows us to recover ...
-1
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1answer
31 views

What is the absolute minimum cumulative weight that a transaction must have to be considered confirmed by a vendor?

I assume that referencing a Milestone is not sufficient for a vendor (exchange). That is, they must be making sure that both a Milestone is referenced AND that some time or cumulative weight threshold ...
0
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0answers
44 views

If the coordinator were to be identified or located, what attacks could be carried out against it?

The coordinator is currently vital to the operation of the Iota network. There are both security (leaking the seed used to generate milestones) and availability (it must be able to issue milestones) ...
2
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0answers
97 views

Can the coordinator be found or identified?

The coordinator is currently vital to the operation of the Iota network. There are both security (leaking the seed used to generate milestones) and availability (it must be able to issue milestones) ...
1
vote
1answer
94 views

What could an adversary do with the seed of the coordinator?

The coordinator issues milestones that the Iota network use as a root of trust when validating transactions. These milestones are signed, which in turn means that keys exist for signing the milestones....
2
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2answers
36 views

Are inbound/outbound Iota connections encrypted?

If I am running a full node, what can an adversary determine from sniffing the traffic to and from my node, or is it all encrypted?
2
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0answers
52 views

How is the secrecy of the Iota seed maintained on IoT devices?

Iota is intended to be deployed on IoT devices. A problem with IoT devices is that they are placed in insecure locations, allowing attackers to gain physical access and perform advance/prolonged ...
2
votes
1answer
101 views

When can a transaction be considered irreversable? (without COO)

In an interesting exchange between Come-From-Beyond (CFB) and a Nxt developer, the question is asked: DEV. So when can a transaction be considered irreversable? CFB. Never, look at formula #14 in ...
2
votes
2answers
188 views

As per “The Stability and the Security of the Tangle”, how will IOTA ensure that all honest nodes are continuously using their hashing power?

As per the recently released The Stability and the Security of the Tangle, a 2018 ICUBE - University of Strasbourg "study of the stability and the security of the distributed data structure at the ...
2
votes
3answers
95 views

What happens if we generate a “seed” that already exists?

According to this answer, "our seed is as the combined username and password that grants access to our bank account. If anyone obtains our seed, they can login and access our funds." Despite ...
2
votes
0answers
91 views

How to compute the % of network computing power the attacker hold?

It is known generally that Tangle is susceptible to 34% attack(of total computing power) that gives a 100% successful attack. The example given on page 19 of white paper says that an upper limit to ...
1
vote
1answer
31 views

Can a bundle be 3 transactions for security level 1?

A bundle has 4 transactions: The output; address and amount of IOTA recipient gets. The input; address, and amount of IOTA sender gives, and half of their signature. The other half of the sender's ...
6
votes
1answer
497 views

What prevents someone from using a Precomputed POW Spam Attack against the network?

What prevents someone from using a Precomputed POW Spam Attack against the network? A theoretical attack could use pre-made transactions to be released before their network expiry dates. Rounds of ...
2
votes
2answers
106 views

How to send a sidekey securely to the subscriber for my channel

Sending the sideKey and channel-id is important for new subscribers to read my stream. How can I securely transmit them over the network? Shouldn´t be the key exchange algorithm also quantum proof?
3
votes
1answer
662 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 ...
-2
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1answer
57 views

Is it really safe? [duplicate]

How likely is it that someone will discover my seed? either by brute force or by trying to generate a new one.
2
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0answers
44 views

Security implications of storing seed on Trezor password manager

I'm wondering about using Trezor password manager to store an IOTA seed and whether there are any security implications I should be aware of? Many thanks!
8
votes
1answer
168 views

How is address reuse prevented in the current wallet implementation?

When trying to send to a foreign address, I got the following error recently: How does my wallet know, that this address has already been used for sending? It's quite an old address, so I assume I ...
4
votes
1answer
80 views

Are there any security considerations regarding running full node?

I have been thinking about setting up a dedicated full node to support the Iota network. In this case would be running some variant of Linux on a dedicated server that would at least meet the ...
5
votes
1answer
116 views

On average, what % of my private key is compromised on the first address re-use, and what exponential effect does it have on security?

Each time we use an address, 50% of your private key is revealed at random. When 50% of the private key is revealed, a computer would have to do 2^256 computations to crack it, similar to the SHA-...
4
votes
1answer
87 views

Is this an official source of the IOTA wallet?

https://github.com/iotaledger/wallet/releases/tag/v2.5.7 Is this release from iota I have got v2.5.6 before I download just wanted to make sure this is right wallet and it’s not a scam Thanks
4
votes
1answer
293 views

How to send data payload and funds in a secure/immutable way?

For me, one of the main use cases for IOTA regarding IOT was to be able to send data and funds in an atomic, immutable way. E.g. sending a bundle including parameters, transferred in the ...
5
votes
2answers
656 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?
5
votes
2answers
286 views

Exchange Winternitz one-time signatures

Are there any Winternitz alternatives out there which on the one hand make quantum computer attacks hard and on the other hand don't mess with the ability to reuse an address? Or are these properties ...
8
votes
1answer
855 views

Why is the normalized hash considered insecure when containing the char 'M'

Looking at the code of the iota.lib.js' bundle creation mechanism, a normalized hash is computed and then checked for inclusion of 13 /* = M */. If one is found, the obsoleteTag is incremented, and ...
3
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0answers
109 views

Iota donation address and security [duplicate]

I see more and more content creators publishing an IOTA address for getting donations. How does that relate to the security advice not use an address for more than one transaction?
5
votes
1answer
701 views

How does Curl-P's copy protection feature work?

I've read in a few articles that the Curl-P hashing function was designed with known practical collisions, intended as a "copy protection" feature. I'm still having trouble wrapping my head around ...
4
votes
2answers
386 views

How to get iota out of an address that has already been used twice?

Is it possible to get IOTAs safely out of an address from which two or more transactions were made already? With safely I mean that there is no chance to get hacked if the third or later transaction ...
3
votes
1answer
74 views

crypto documentation for iota?

Is there a documentation about the crypto-primitives and the crypto protocols, that are used by iota and how they are implemented? And if so, where ;-)
5
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0answers
215 views

MAM message encryption

According to the documentation message encryption is done in following way Each message is encrypted with a one-time pad that consists of the channel ID and the index of the key used to sign the ...
3
votes
1answer
175 views

Roadmap: How to avoid address reuse with automatic snapshots?

It is well known that an address that was used to send IOTA (i.e. a transaction was signed with that addresses private key) should not be used a second time because security weakens exponentially with ...
7
votes
1answer
759 views

Do I Have to Change My Seed after Multiple Transactions?

Is it recommended to change the seed and transfer the funds after creating a higher, specific amount of Receive addresses and doing multiple (20+), completed transactions (no double-spending of course)...
2
votes
5answers
374 views

Seed generator best and safe? [duplicate]

Which is the best seed generator and is there an official one Thanks
3
votes
1answer
213 views

Mechanism used to Claim at risk addresses

What Mechanism was used to Claim the at risk addresses? (from the September and October events) How Is it possible to move anothers address into an amalgamated foundation address?
7
votes
2answers
328 views

Address re-use and snapshot

If an address was used more than once to spend, as was the case in the September claim, are addresses that were weakened for violating the Winternitz, One Time Signiture architecture of the tangle, ...
2
votes
1answer
122 views

How to restrict access to certain API commands so that only certain clients can call them?

If wallets use the API port and therefore access to certain functions needs to be restricted, how can a script of mine use the full API without those restrictions? For example https://iotasupport.com/...
10
votes
0answers
211 views

How would IOTA handle a spam attack that is NOT attempting to successfully double spend, but merely make the network unusable? [duplicate]

So it seems like all of the security solutions mentioned so far are focused on preventing double spend attacks. But what about attacks that aren't motivated by actually successfully double spending?...
0
votes
1answer
36 views

Is it more secure to use VPN client? [closed]

As I am always afraid of keylogger and viruses "seeing" me tipping in the seed into my wallet I wonder if it may be more secure if I use a VPN tunnel to go into the internet.
6
votes
2answers
93 views

Good practice how to choose ports

I've setup a full node and while doing so was wondering about the following: 1. Would it be safer not to use the same prominent ports as everybody else does (e.g. 14600, 14700, 14265). If instead the ...
5
votes
3answers
259 views

Should full nodes be public?

Since part of the security comes from it being hard to find enough nodes to peer with to influence the selected transactions, should full nodes be mostly hidden? Will a IOTA attack consist of botnets ...
2
votes
1answer
113 views

Could a sensor be hacked to steal the money in its wallet?

If there is a sensor with a wallet and someone steals the sensor. Wouldn't it be easy for him to hack the sensor and find the seed?
8
votes
1answer
119 views

Is it safe to expose the API to the public? [duplicate]

I just got a full node up and running, following the guide on here http://iota.partners/. I have a firewall on, so all ports are blocked except for UDP 14600 and TCP 15600. In my iota.ini file I have ...
3
votes
3answers
99 views

Sending seeds to someone securely

If I want to send a seed to someone. How would you do it securely? Is it maybe even possible through the tangle? For example I have a seed with 50Miota and I want to give it away to a friend who ...