Enova Patents

7,136,995: Cryptographic device
http://patft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7136995.PN.&OS=PN/7136995&RS=PN/7136995

1. A cryptographic device, compromising: at least one data stream interceptor that distinguishes between command/control and data signal transfers; a main controller receiving input from said at least one data stream interceptor and determining whether incoming data would be encrypted or passed through based on the received input from said at least one data stream interceptor; at least one data generating controller adapted to perform at least one data transfer protocol with at least one data generating device on command from said main controller; at least one data storage controller adapted to perform at least one data transfer protocol with at least one data storage device on command from said main controller; and at least one cipher engine adapted to transparently encrypt at least one data stream between said at least one data generating device and said at least one data storage device on command from said main controller.

7,900,057: Cryptographic serial ATA apparatus and method
http://patft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7900057.PN.&OS=PN/7900057&RS=PN/7900057

1. A cryptographic Serial ATA (SATA) apparatus, comprising: a SATA protocol stack for communicating with an interface of a device; a cryptographic engine operatively coupled to the SATA protocol stack for encrypting or decrypting at least a subset of data FISes (Frame Information Structures) communicated to or from the SATA protocol stack; and a main controller implemented at least partially in hardware, the main controller configured to cause: the SATA protocol stack to send at least first payload of a first data FIS to the cryptographic engine responsive to the first data FIS associated with a pre-defined category of command set; the cryptographic engine to decrypt at least a portion of the first payload received from the SATA protocol stack; and the SATA protocol stack to process a Register-Device to Host FIS without decryption responsive to receiving the Register-Device to Host FIS from the interface of the device.