Using multi-party computation and k-anonymity techniques to protect confidential information

A system comprising:

• one or more processors;
• and
• one or more storage devices storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• receiving, by a first multi-party computation (MPC) computing system and from a client device, a content request comprising a set of encrypted user group identifiers, wherein each encrypted user group identifier is encrypted using a first encryption key of a second MPC computing system;
• for each encrypted user group identifier, transmitting a request to the second MPC computing system, the request comprising the encrypted user group identifier;
• for each user group identifier that satisfies a k-anonymity process performed by the second MPC computing system:
• receiving, by the first MPC computing system from the second MPC computing system, a plaintext value of the user group identifier;
• and
• transmitting, by the first MPC computing system, a selection parameter request to one or more platforms, the selection parameter request comprising the plaintext value of the user group identifier;
• receiving, by the first MPC computing system and from the second MPC computing system, a set of selection parameter elements that each comprise a creative element for a corresponding digital component and a selection parameter identifier for the digital component;
• selecting, by the first MPC computing system, a given digital component based on the selection parameter identifiers;
• and
• transmitting, by the first MPC computing system and to the client device, the creative element for the digital component.

A non-transitory computer readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• receiving, by a first multi-party computation (MPC) computing system and from a client device, a content request comprising a set of encrypted user group identifiers, wherein each encrypted user group identifier is encrypted using a first encryption key of a second MPC computing system;
• for each encrypted user group identifier, transmitting a request to the second MPC computing system, the request comprising the encrypted user group identifier;
• for each user group identifier that satisfies a k-anonymity process performed by the second MPC computing system:
• receiving, by the first MPC computing system from the second MPC computing system, a plaintext value of the user group identifier;
• and
• transmitting, by the first MPC computing system, a selection parameter request to one or more platforms, the selection parameter request comprising the plaintext value of the user group identifier;
• receiving, by the first MPC computing system and from the second MPC computing system, a set of selection parameter elements that each comprise a creative element for a corresponding digital component and a selection parameter identifier for the digital component;
• selecting, by the first MPC computing system, a given digital component based on the selection parameter identifiers;
• and
• transmitting, by the first MPC computing system and to the client device, the creative element for the digital component.