Advanced New Technologies Co., Ltd.

Alibaba Group Holding Limited

Alipay (hangzhou) Information Technology Co., Ltd.

Chaofan Yu

Lei Wang

Aihui Zhou

Ning Zhang

Hongliang Tian

Junxian Xiao

Qunshan Huang

Weiwen Cai

Yufei Lu

Jin Tan

Embodiments of this specification provide computer-implemented methods, apparatuses, computer-readable media, and systems for secure multi-party computation. In an example secure multi-party computation method, a first party encrypts a first plaintext segment of target data by using a homomorphic encryption algorithm based on a public key held by the first party in a first key pair to obtain a first ciphertext segment. A second plaintext segment of the target data is owned by a second party. The first party sends the first ciphertext segment to the second party. The second party performs a homomorphic addition operation in the homomorphic encryption algorithm on the first ciphertext segment and the second plaintext segment of the target data to obtain ciphertext data of the target data. The ciphertext data is decrypted based on a private key in the first key pair.

Secure multi-party computation methods, apparatuses, and systems

Some embodiments of the present specification provide a method and an apparatus for establishing a trusted channel between a user and a trusted computing cluster. According to the method, when a user wants to establish a trusted channel with a trusted computing cluster, the user only negotiates a session key with any first trusted computing unit in the cluster to establish the trusted channel. Then, the first trusted computing unit encrypts the session key using a cluster key common to the trusted computing cluster to which the first trusted computing unit belongs, and sends the encrypted session key to a cluster manager. The cluster manager transmits the encrypted session key in the trusted computing cluster, so that other trusted computing units in the cluster obtain the session key and join the trusted channel. Thus, the user establishes a trusted channel with the entire trusted computing cluster.

Method and apparatus for establishing trusted channel between user and trusted computing cluster

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for providing certifications. One of the methods includes: receiving, from a computing unit, a certificate request, wherein the computing unit comprises at least one processor and a memory communicably coupled to the at least one processor, wherein the memory stores programming instructions associated with a computing task executable by the at least one processor, and wherein the certificate request comprises a group of identifiers of a group of computing tasks and authentication information that comprises a hash value of the programming instructions; authenticating the computing unit based on the authentication information; in response to the computing unit is authenticated, determining, based on the hash value, that a computing task is included in the group of computing tasks; obtaining a certificate chain and a private key pre-generated for the group of identifiers; and sending a certificate report to the computing unit.

Method and apparatus for performing multi-party secure computing based-on issuing certificate

This disclosure relates to providing a high availability computing service in a distributed system. In one aspect, a method includes sending, by a computing unit of multiple computing units that are each executing a respective copy of a computing task, a certificate request to a trusted certificate generator. The request includes authentication information. The authentication information includes a code hash of the computing task. The computing unit receives a certificate report including a public key certificate in a certificate chain generated for the code hash and a private key corresponding to the public key certificate. The public key certificate and the private key form a certificate pair. The certificate chain includes multiple certificates including the public key certificate and a root certificate corresponding to the public key certificate. The computing unit is used as a TLS server. The certificate pair is set as a certificate pair of the TLS server.

Providing high availability computing service by issuing a certificate

Implementations of the present specification provide a data processing method and apparatus. A method performed by a data provider includes: obtaining first encrypted data of first plaintext data, a first key used to decrypt the first encrypted data, and authorization information about the first plaintext data; sending a verification request to a data manager, the data manager including a first trusted execution environment; receiving authentication information from the data manager, and performing verification based on the authentication information; when the verification succeeds, securely transmitting the first key and the authorization information to the first trusted execution environment; and providing the first encrypted data to the data manager.

Growing community of inventors

Hangzhou, China

Chaofan Yu