A VPN servers request is transmitted from a user device to a central server. A first VPN server is received from the central server at the user device. Responsive to the user device failing to establish a first encrypted tunnel with the first VPN server, a request for another VPN server is transmitted from the user device to the central server. A second VPN server is received from the central server. A second encrypted tunnel is established with the second VPN server. An encrypted communication is obtained by encrypting a communication directed to a network server. The encrypted communication is transmitted from the user device to the VPN second server.

A user device and a server conduct a secure online transaction. The user device transmits received user login and credentials to the server, as well as one or more properties of the user device, such as a list of applications stored on the user device. The server transmits one or more restrictions back to the user device, such as which ports to close, which applications to close, and what features of applications and the operating system should be limited during the transaction. After implementing the restrictions, the user device and the server conduct the online transaction. A unique ID may be transmitted throughout the transaction and the unique ID may be a hash. After the transaction, the user device purges transaction data, restores normal operation, and notifies the server. The transaction may be conducted in a second tunnel and the other communication via a first tunnel.

Implementations of a system and method of generating and using bilaterally generated variable instant passwords are disclosed. The system is used to secure electronic transactions (e.g., an auction in which one or more bidders are unknown to the auctioneer). In this system an Internet Service Provider (ISP), on request from a USER (e.g., a bidder), facilitates an authentication process with a SERVICE PROVIDER (e.g., an auctioneer). The SERVICE PROVIDER may send a sub-folder, containing a USER name, a temporary sub variable character set, and a CALL, to the USER through the ISP. The password used to access the sub-folder is transmitted directly to the USER by the SERVICE PROVIDER. The USER gets authenticated to the SERVICE PROVIDER by using the USER name, the temporary sub variable character set, and the CALL retrieved from the sub-folder. After USER's authentication, further transactions (e.g., bids) are performed using a password for each transaction.

Embodiments utilize two types of passwords that each, separately, allow a device user to logon to a network. The first is a master password that allows a user to log on at any time. The second is a turn-varying password that changes with each logon and is valid for only one logon. The network may be accessed by using either the master password or the turn-varying password. The turn-varying password may be presented to a user at the device. A device and a network apparatus may each initially synchronize and maintain a turn state that is based on a number of user logons. When a logon occurs, the device and network apparatus update the turn-varying password for the next logon using the turn-varying password. If a user is in an unsecure location and logs on only using the turn-varying password, a sniffed or stolen turn-varying password is not useable.

A one-time password (OTP) based security scheme is described, where a provider pre-generates a number of verification codes (e.g., OTP codes) which will be valid for a predetermined interval. The provider then encodes the verification codes (e.g., by hashing each code with a time value), and stores the verification codes into a data structure. The data structure can be provided to a verification system that can use the set of pre-generated OTP codes to authenticate requests received from users having personal security tokens.

An information processing method, device, and storage medium are provided. The method includes: a screen-transmission sending end, in response to a first operation acting on characters, displaying the characters in an input box in response to a first operation acting on the characters; determining a target screen-transmission code according to input characters; displaying the target screen-transmission code in the input box; parsing the target screen-transmission code and obtaining an IP address of a screen-transmission receiving end; establishing a connection with the screen-transmission receiving end according to the IP address; sending the target screen-transmission code to the screen-transmission receiving end to obtain a check result of the target screen-transmission code; and if the check result is that a check is passed, sending screen transmission data to the screen-transmission receiving end.

The invention provides an authentication technique that involves provision of a new authentication credential for each authentication attempt. The requestor of the new authentication credential is required to provide a previous authentication credential in order to successfully receive the new authentication credential. The previous authentication credential has however been de-authorised so it cannot be used to authenticate the requestor, only to successfully obtain a new authentication credential. The requestor then authenticates using the new authentication credential. The cycle is repeated for as many repeat authentication attempts as are made by the requestor.

An example operation may include one or more of receiving, from an executing client, a blockchain transaction comprising an anonymous rating related to an authorizing client, a merkle tree root node value, a proof, and a nullifier, and in response, executing, by a smart contract, a valid historical value assert call on a lookback key storing the merkle tree root node value, verifying, through a valid historical value assert call, that the merkle tree root node value is a current or previous value of the merkle tree root node value, verifying the proof with the merkle tree root node value and the nullifier, adding the anonymous rating to a shared ledger, marking the nullifier as used, and storing the marked nullifier to the shared ledger.

The present disclosure relates to a chip booting control method, a chip, a display panel, and an electronic apparatus. The method is applied to a control circuit of a chip, and the chip further includes a buffer. The method includes: reading first booting information from the buffer in response to a chip triggering non-power-down reset, the first booting information being used to boot the chip; determining whether the first booting information satisfies a first preset condition; and booting the chip according to the first booting information in response to the first booting information satisfying the first preset condition.

Embodiments present different password-less sign-in alternatives for selection by the user for a subsequent future login to the service provider account interface, and in response to determining that data inputs from a user satisfy associated data requests, enable the selected password-less sign-in alternative for a subsequent login of the user into the service provider account interface, wherein the subsequent login of the user into service provider account interface via the enabled selected password-less sign-in alternative does not require the user to enter the password.