Ethereum zero-knowledge layer-2 scaling platform zkSync has continued to defend criticism over the criteria for its zkSync (ZK) token airdrop, slated to launch on June 17.
In a frequently asked questions (FAQ) document updated on June 15, ZK Nation answered 15 questions explaining why some groups were eligible for the token while others weren’t.
One of its longer answers focused on its detection and prevention measures for Sybil attacks, which occur when one entity creates and uses a large number of wallets to farm an airdrop. This was a continuing pain point among airdrop claimants recently.
ZkSync reiterated it had used “explicit” Sybil detection in addition to a “unique airdrop design” to ensure the highest number of organic users were rewarded, but it also noted that this has led to some Sybil wallets being let through.
Source: ZK Nation
It explained some Sybils can employ sophisticated algorithmic strategies that are indistinguishable from real people.
“They fund accounts from many distinct exchange addresses, never interact with each other, use randomized amounts, and use software to randomize daily patterns of human behavior, and even perform activities unique to the project (for example, using zkSync paymasters),” it explained.
“The majority of such bots are completely undetectable, even with the most advanced anti-Sybil methodology.”
ZkSync claimed that being too aggressive with filtering could eliminate some Sybils but also might falsely flag many organic users, so it chose to reward organic users with “high likelihood” by using a combination of value scaling and multipliers.
Essentially, this assigned fewer eligibility points to wallets with low funding (a sign of Sybil behavior) but would give them a multiplying boost if there was onchain behavior that signaled human behavior.
ZkSync explained that Sybils typically creates many accounts but uses small amounts of crypto to fund each account to be capital efficient.
Introducing the ZK Token
Checker → https://t.co/O2UonCvfzi
Announcement → https://t.co/hjgI14PHoi
Docs → https://t.co/taWBoCnfbc
It’s time to put the ZK token into the…
..
