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Information providing method, device and system and information obtaining method and device

A technology for encrypting information and predetermined information, applied in the computer field, can solve the problem of restricting the time for users to view information, and achieve the effect of improving strict restrictions and preventing tampering

Active Publication Date: 2020-03-17
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scenario, it is necessary to limit the time for users to view information

Method used

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  • Information providing method, device and system and information obtaining method and device
  • Information providing method, device and system and information obtaining method and device
  • Information providing method, device and system and information obtaining method and device

Examples

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Embodiment Construction

[0049] The subject matter described herein will be discussed below with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and realize the subject matter described herein, and is not intended to limit the protection scope, applicability or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as needed. Additionally, features described with respect to some examples may also be combined in other examples.

[0050] As used herein, the term "comprising" and its variants represent open terms meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment." The term "anoth...

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Abstract

The invention provides an information providing method and device, an information obtaining method and device and an information providing system. The information providing method comprises the following steps: acquiring block chain transaction hash of encrypted information from a block chain, wherein the encrypted information is generated by encrypting predetermined information by using an encryption key for the predetermined information; and storing a key index and setting expiration time for a decryption key corresponding to the encryption key, the key index indicating the decryption key corresponding to the block chain transaction hash, and the expiration time indicating that the decryption key is deleted when the current time reaches or exceeds the expiration time. When the information is acquired, the encryption information and the decryption key can be acquired based on the block chain transaction hash, and then the encryption key is decrypted by using the decryption key so as to acquire the predetermined information.

Description

technical field [0001] The present disclosure relates to the field of computer technology, and in particular, to an information providing method and device, an information obtaining method and device, and an information providing system. Background technique [0002] Blockchain technology uses chained data structures to verify and store data, uses distributed node consensus algorithms to generate and update data, and uses cryptography to ensure data transmission and access security. When using blockchain technology to process transactions, for transactions initiated by the client, the smart contract is usually invoked to execute the transaction when the transaction is verified, thus ensuring transaction security. Once the data is written into the blockchain on each node, on the one hand, it means that the data is made public in the blockchain network; on the other hand, the data written into the blockchain is difficult to be deleted and tampered with. In addition, centraliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/27G06F21/60G06F21/64
CPCG06F21/602G06F21/64G06F16/27
Inventor 叶国俊
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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