What is T+N (Security protection for buying crypto)? T+N refers to a security protection mechanism for cryptocurrency purchases. When you buy crypto through P2P on the platform, the system performs a comprehensive risk assessment of the transaction. Based on this assessment, it may temporarily restrict the withdrawal and P2P resale of the equivalent assets for N days.

Some tokens may have T+N security protection, meaning they cannot be withdrawn or sold within N days after purchase to ensure account security. The exact number of days is shown on the platform. For more details, please refer to: What should I do if the T+N security protection is triggered and I can't trade? 11. Is it allowed to buy tokens through P2P trading using another person's bank account/payment method?

Low-degree polynomial extension: using the above polynomial constraints, we can obtain a computation trace polynomial of length uts * N. For security reasons, we perform commitment to the polynomial on a larger evaluation domain, with the domain amplification factor as extension_factor. In the above case, we could calculate a polynomial p(x) from I(x). When we use an extension_factor of 8, we will calculate another 32(8-1)* points on p(x).

(“OKX Brazil”) a company duly organized and existing under the laws of Brazil with its registered office at Avenida Brigadeiro Faria Lima, n. 4055, floor 4, room 113, Itaim Bibi, in the city and Estate of São Paulo, Zip Code 04538-133, Brazil, enrolled with the CNPJ/MF under nr. 50.459.025/0001-26 [and with a contact email address no-reply@okx.com]. OKX Australia and OKX Brazil are collectively referred to herein as “OKX.”