Abstract: The present disclosure relates to a computerized method and system for message encryption in a multi-user setting. The method involves receiving a message of arbitrary length for each user, storing the message in a computerized data store, and executing a setup to generate a master secret and public keys. A random variable is generated, and a function is defined based on this variable. A second secret is derived using a functional encryption scheme, resulting in a derived secret. The message is encrypted by generating a first random string, a second partially random string, and a ciphertext. The system also includes a method for decrypting the encrypted message, processing the derived secret and ciphertext to derive a string, and deriving a plaintext message from this string.

Abstract: The present disclosure provides a method for secure message encryption and decryption using witness encryption. The method includes generating a master public key and a master secret key, generating common reference strings for a non-interactive zero-knowledge (NIZK) proof system and a commitment scheme, creating commitments using random values, and setting the master public and secret keys. A function key is generated by creating a dummy function tag and a NIZK proof. Message encryption involves generating a dummy input tag and creating a witness encryption ciphertext. The encrypted output includes attributes, the dummy input tag, and the witness encryption ciphertext. Decryption is performed using the function key and a witness decryption algorithm. The method enables secure message transmission with confidentiality and integrity throughout the encryption and decryption phases.

Abstract: The disclosure relates to generating a ciphertext of arbitrary and flexibly large size and ensures that an adversary learns little about the encrypted data, even if the decryption key later leaks, unless substantially the entire ciphertext is stored. Given that communication will be inconveniently large for the adversary to store, the incompressible ciphertexts and signatures can be sent and received with low storage requirements for the honest users. In such a setting, the honest users would not store the entire ciphertext or signature, but instead generate, send, and process the communication bit-by-bit in a streaming fashion.

Abstract: The invention relates to systems, methods, network devices, and machine-readable media for creating obfuscated computer-executable instructions to enhance security. The invention can receive a set of non-obfuscated executable instructions corresponding to a program, and using a functional encoding primitive comprising an encoding process, an opening process, and a decoding process, generate a set of obfuscated instructions which can then be provided to a relatively insecure environment.

Abstract: The disclosure relates to generating a ciphertext of arbitrary and flexibly large size and ensures that an adversary learns little about the encrypted data, even if the decryption key later leaks, unless substantially the entire ciphertext is stored. Given that communication will be inconveniently large for the adversary to store, the incompressible ciphertexts and signatures can be sent and received with low storage requirements for the honest users. In such a setting, the honest users would not store the entire ciphertext or signature, but instead generate, send, and process the communication bit-by-bit in a streaming fashion.

Abstract: The present disclosure relates to a computerized method and system for message encryption in a multi-user setting. The method involves receiving a message of arbitrary length for each user, storing the message in a computerized data store, and executing a setup to generate a master secret and public keys. A random variable is generated, and a function is defined based on this variable. A second secret is derived using a functional encryption scheme, resulting in a derived secret. The message is encrypted by generating a first random string, a second partially random string, and a ciphertext. The system also includes a method for decrypting the encrypted message, processing the derived secret and ciphertext to derive a string, and deriving a plaintext message from this string.

Abstract: The invention relates to systems, methods, network devices, and machine-readable media for creating obfuscated computer-executable instructions to enhance security. The invention can receive a set of non-obfuscated executable instructions corresponding to a program, and using a functional encoding primitive comprising an encoding process, an opening process, and a decoding process, generate a set of obfuscated instructions which can then be provided to a relatively insecure environment.