Scalable encryption engine having partitionable data paths

A method comprising:

• determining, by a decryption engine, a decryption mode based on a frequency at which one or more clocks of a plurality of clocks of the decryption engine are presently operating, wherein each clock of the one or more clocks controls a respective sub-datapath of a plurality of sub-datapaths of the decryption engine, and wherein each decryption sub-datapath has no data interdependency with any other decryption sub-datapath of the plurality of decryption sub-datapaths;
• selectively enabling, by the decryption engine, one or more decryption sub-datapaths of the plurality of decryption sub-datapaths to decrypt a block of encrypted data to form a decrypted block of data based on a determination that the respective clocks that control the one or more enabled decryption sub-datapaths are in an activated state;
• and
• decrypting, by the decryption engine, a block of encrypted data to form a decrypted block of data using the one or more selectively enabled sub-datapaths.

An apparatus for data decryption, the apparatus comprising:

• an interface comprising processing circuitry configured to receive a block of encrypted data for decryption;
• and
• a decryption engine in communication with the interface, the decryption engine comprising a plurality of decryption sub-datapaths, where each respective decryption sub-datapath has no data interdependency with any other decryption sub-datapath of the plurality of decryption sub-datapaths, wherein the decryption engine comprises processing circuitry configured to selectively enable one or more decryption sub-datapaths of the plurality of decryption sub-datapaths to decrypt the block of encrypted data to form a decrypted block of data, wherein the decryption engine is configured to selectively enable the one or more decryption sub-datapaths based on a decryption mode according to which the decryption engine is operating;
• wherein the decryption engine is configured to implement a plurality of clocks, each respective clock of the plurality of clocks being associated with a respective decryption sub-datapath of the plurality of the decryption sub-datapaths, and
• wherein to selectively enable the one or more decryption sub-datapaths, the decryption engine is configured to, for each of the one or more decryption sub-datapaths, activate the clock associated with the respective decryption sub-datapath.

An artificial reality system comprising:

• an encryption engine comprising a plurality of encryption sub-datapaths where each encryption sub-datapath has no data interdependency with any other encryption sub-datapath of the plurality of encryption sub-datapaths, and wherein the encryption engine is configured to selectively enable one or more encryption sub-datapaths of the plurality of encryption sub-datapaths to encrypt a block of input data to form an encrypted block of data, wherein the encryption engine is configured to selectively enable the one or more encryption sub-datapaths based on an encryption mode according to which the encryption engine is operating;
• and
• a head-mounted display (HMD) configured to output the encrypted block of data;
• wherein the encryption engine is configured to implement a plurality of clocks, each respective clock of the plurality of clocks being associated with a respective encryption sub-datapath of the plurality of the encryption sub-datapaths, and
• wherein to selectively enable the one or more encryption sub-datapaths, the encryption engine is configured to, for each of the one or more encryption sub-datapaths, activate the clock associated with the respective encryption sub-datapath.