US 11,539,505 B2 · Encrypting data

Abstract

A method and system. An instruction to encrypt plaintext to generate encrypted data from the plaintext is received. The encrypted data is to be stored in a database device in response to a first request received from a client terminal to store the plaintext in the database device. The first request includes the plaintext. Ciphertext is generated by applying both an initialization vector and an encryption key directly to the plaintext. An embedding rule used to generate the encrypted data is selected from a sequence of embedding rules. The encrypted data is stored in the database device, A second request to receive the plaintext data is received from the client terminal. The plaintext is obtained from the encrypted data, by separating the encrypted data into the ciphertext and the initialization vector; and generating the plaintext by decrypting the ciphertext that was separated from the encrypted data.

Claims18

Dependent claims

A method, said method comprising:

generating, by a processor of a computer system, ciphertext by applying both an initialization vector and an encryption key directly to plaintext;
said processor selecting one embedding rule from a sequence of embedding rules, said selecting the one embedding rule comprising using the first two bits of the ciphertext to select the one embedding rule from the sequence of embedding rules;
said processor using the selected one embedding rule to combine the initialization vector with the entire ciphertext to generate encrypted data;
said processor storing the encrypted data in a database device;
and
said processor retrieving the encrypted data, obtaining the plaintext from the encrypted data, and sending the obtained plaintext to a client terminal, wherein said obtaining the plaintext from the encrypted data comprises:
separating the encrypted data into the ciphertext and the initialization vector;
and after said separating, generating the plaintext by decrypting, using the encryption key and the initialization vector, the ciphertext that was separated from the encrypted data.

5 more elements

A computer program product, comprising a computer readable storage device having computer readable program code stored therein, said program code containing instructions which, upon being executed by a processor of a computer system, implement a method, said method comprising:

said processor generating ciphertext by applying both an initialization vector and an encryption key directly to plaintext;
said processor selecting one embedding rule from a sequence of embedding rules, said selecting the one embedding rule comprising using the first two bits of the ciphertext to select the one embedding rule from the sequence of embedding rules;
said processor using the selected one embedding rule to combine the initialization vector with the entire ciphertext to generate encrypted data;
said processor storing the encrypted data in a database device;
and
said processor retrieving the encrypted data, obtaining the plaintext from the encrypted data, and sending the obtained plaintext to a client terminal, wherein said obtaining the plaintext from the encrypted data comprises:
separating the encrypted data into the ciphertext and the initialization vector;
and after said separating, generating the plaintext by decrypting, using the encryption key and the initialization vector, the ciphertext that was separated from the encrypted data.

5 more elements

A computer system comprising a processor, a memory coupled to the processor, and a computer readable storage device coupled to the processor, said storage device containing program code which, upon being executed by the processor via the memory, implements a method, said method comprising:

said processor generating ciphertext by applying both an initialization vector and an encryption key directly to plaintext;
said processor selecting one embedding rule from a sequence of embedding rules, said selecting the one embedding rule comprising using the first two bits of the ciphertext to select the one embedding rule from the sequence of embedding rules;
said processor using the selected one embedding rule to combine the initialization vector with the entire ciphertext to generate encrypted data;
said processor storing the encrypted data in a database device;
and
said processor retrieving the encrypted data, obtaining the plaintext from the encrypted data, and sending the obtained plaintext to a client terminal, wherein said obtaining the plaintext from the encrypted data comprises:
separating the encrypted data into the ciphertext and the initialization vector;
and after said separating, generating the plaintext by decrypting, using the encryption key and the initialization vector, the ciphertext that was separated from the encrypted data.

5 more elements

Dependencies are inferred from the claim text.

Encrypting data

Life of this patent

Encrypting data

Life of this patent

Abstract

Claims18