Abstract: Provided is a method for protecting an encrypted control word. The method includes: receiving a hardware security module entitlement management message and an encrypted control word transmitted from a main chip, where the hardware security module entitlement management message includes a key for decrypting the encrypted control word; decrypting, based on the hardware security module entitlement management message and a hardware security module root key stored in the hardware security module, the encrypted control word to obtain a control word; reencrypting the control word based on a re-encryption key stored in the hardware security module to obtain a reencrypted control word; and transmitting the reencrypted control word to the main chip, so that the main chip decrypts, based on a main chip entitlement management message transmitted from the front end, the reencrypted control word to obtain the control word.

Abstract: Method for establishing a trust chain, comprising: requesting a third CA for a third key pair and a third certificate, writing a private key of the third key pair and the third certificate into a security storage area, the third certificate comprising model information of the smart television (SMTV) terminal and information of a public key of the third key pair. The SMTV terminal check its possession of a fourth certificate on every start, generate a unique fourth key pair in absence of a fourth certificate, submit online a public key of the fourth key pair and a unique identification of each SMTV terminal to a fourth CA to request for a fourth certificate, and send along the third certificate and a signature signed on the request with the private key of the third key pair; write the fourth certificate into the security storage area upon receiving the fourth certificate.

Abstract: Embodiments of the present invention provide a charging and power supplying circuit, method and application device, which relate to the field of smart charging, so as to improve efficiencies of battery charging and system power supplying. The charging and power supplying circuit includes a power supplying tributary and a charging tributary. An end of the power supplying tributary is connected to a power supply, and another end is connected to a system. An end of the charging tributary is connected to the power supply, and another end is connected to a battery. A first transistor, a second transistor, a third transistor, a first amplifier, a second amplifier, a third amplifier, a fourth amplifier, a first comparator, a second comparator, a charging controller, a logical switch, an adder and a first control module are connected to the power supplying tributary and the charging tributary.

Abstract: The method includes the following steps: monitoring an actual value of a relevant parameter of a display bandwidth of data to be output by the memory; comparing the actual value of the relevant parameter with a threshold to determine whether the actual display bandwidth meets predetermined requirements; and selecting an access arbitration mode for the memory according to whether the predetermined requirements are met. The access controller includes: a monitoring and comparing unit, adapted to monitor an actual value of a relevant parameter of a display bandwidth of data to be output by the memory and compare the actual value of the relevant parameter with a threshold to determine whether the actual display bandwidth meets predetermined requirements; and an arbitration adjusting unit, adapted to select an access arbitration mode for the memory according to whether the predetermined requirements are met.