1. What is the general idea of a sybil attack?
An individual might create multiple identities in order to be able to influence the network. Because it is cheap and easy to have more than one identity it something common.
2. What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
In such a case, the multiple identities could lead to the possibility that voting results could be manipulated.
The idea of a Sybil attack is that one entity creates many other (unknown) entities within a network in order to gain a majority control over the network to influence outcomes or validate erroneous transactions. Several key components to blockchain technology actually provide the landscape for the possibility of these types of attacks.
The sheer construct of a Decentralized Ledger suggests that the network is held, maintained, appended, and transacted upon over a vast network of independent contributors, often referred to as nodes. These nodes are treated equally and independently in the ecosystem, however, the truth is that many nodes can be operated by a single party or entity. Also because of the decentralized nature coupled with the idea of anonymity further expands the possibility of a playing field for bad actors, who may individually assume many identities, or nodes, on the network, or even collude and conspire to work together with other bad actors to hijack the network or alter/intercept transactions. In the case of Blockchain structures, the idea of consensus is the major concept to verification and the lack of a need for trust. It may be inferred then that if trust is implicit, it need not be considered as a potential flaw,making it even more subversively dangerous.
What is the general idea of a sybil attack?
Creating numerous identities in order to influence a reputation system.
What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
Low cost and simplicity to create identities could encourage sybil attacks.
What is the general idea of a sybil attack?
Create similar identities on a peer to peer network, to pass as the original one.
What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
Easy to generate different identities and no central authority to verify.
1.) What is the general idea of a sybil attack?
The general idea of a Sybil attack is to subvert the reputation system of a network service by creating a large number of pseudonymous identities and uses them to gain a disproportionately large influence.
2.) What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
An adversary may present multiple identities to a peer-to-peer network in order to appear and function as multiple distinct nodes. The adversary may thus be able to acquire a disproportionate level of control over the network, such as by affecting voting outcomes.
1 One “user” will apperar as many, with multiple identities in the p2p network.
2 When the network cannot identify uniqe users, allowing multiple identities the user can create many to get a larger infuence in the network.
What is the general idea of a sybil attack?
A) One person can create multiple accounts in a peer to peer network.
What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
A) it is easy and cheap to create new identities and If a system does not verify those identities, this can result in a Sybil attack.
1 1 person with more identeties,attacks the peer to peer network.
2.when its cheap and easy to create more identtitys
Ad 2.:
The threat of a sybil attack gets more likely when there is a “weak” conensus algorithm impemented or the network is relatively small. There is the idea of using game theory in order to incentivize nodes to act honestly. But in small networks, its cheap to harm the network e.g. by sybil attacks.
it is an attack where an entity uses multiple identities to influence a network by creating false reputation in the system
if they can create lots of accounts easily, then they can have a big influence in things like voting/consensus systems.
1.the general idea of sybil attack is the attacker creates a large amounts of pseudonymous identities to gain large disproportionately influence.
2.The sybil attack will occur if there is small amount of nodes participating in the server thus overpowering by the sybil attacks pseudonymous identities.
One entity creates many identities on the network with the goal to gain influence or even control the network.
If it is easy (not sufficient identity and personhood validation) and cheap to create identities within the network.
1.- A Sybil attack occurs when a distributed system is corrupted by the same entity that controls different identities of that network, so the idea behind is to gain control or influence in the network without being noticed as a single entity.
2.-The vulnerability of the system depends on the ease of creating new identities (how cheap/inexpensive/easy is to create the attack) and the (lack of) importance of the chain of trust, which can cause all identities to be treated equally.
Someone pretends to have access when they do not. Access can be subject to verification, proof of work or other methods that discourage this type of attack.
1. What is the general idea of a sybil attack? The attack is made by surrounding a node by peers under control of the attacking power
2. What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur? When the node is conservative to connect always to the same nodes, this is a deficiency that might be used for such attack
The general idea of a Sybil attack is to gain more influence or control over a peer to peer network by creating multiple pseudonymous identities associated with a single entity. Doing this can increase the entity’s influence over the peer to peer network by disproportionately representing that entity’s voting power via these pseudonymous identities.
Deficiencies within a peer to peer network, or even specifically a crypto currency network, that could allow a Sybil attack to occur include a low economic cost for creating identities, the degree to which the network accepts inputs from an entity which does not have a chain of trust linking them to another trusted entity, and whether or not the network treats all identities the same.