Abstract: Systems, methods and computer readable media enable secure patch downloading from a host to a target with improved security computation operations based on transport conditions. The method may include receiving a packet of the patch from the host; verifying that the packet is not a retransmission of a previously received packet; if the verification succeeds, performing a first type of security computation based on the packet; if the verification fails and the content of the packet differs from the content of the previously received packet, stopping further performance of the first type of security computation until a final packet of the patch is received; performing a second type of security computation based on one or more of the received packets; and determining a security status of the patch based on a comparison of the first type of security computation and the second type of security computation.

Abstract: Generally, this disclosure provides systems, methods and computer readable media for secure patch downloading from a host to a target, with improved security computation operations based on transport conditions. The method may include receiving a packet of the patch from the host; verifying that the packet is not a retransmission of a previously received packet; if the verification succeeds, performing a first type of security computation based on the packet; if the verification fails and the content of the packet differs from the content of the previously received packet, stopping further performance of the first type of security computation until a final packet of the patch is received; performing a second type of security computation based on one or more of the received packets; and determining a security status of the patch based on a comparison of the first type of security computation and the second type of security computation.

Abstract: Systems, methods and computer readable media for secure patch downloading from a host to a target, with improved security computation operations based on transport conditions. The method may include receiving a packet of the patch from the host; verifying that the packet is not a retransmission of a previously received packet; if the verification succeeds, performing a first type of security computation based on the packet; if the verification fails and the content of the packet differs from the content of the previously received packet, stopping further performance of the first type of security computation until a final packet of the patch is received; performing a second type of security computation based on one or more of the received packets; and determining a security status of the patch based on a comparison of the first type of security computation and the second type of security computation.

Abstract: Generally, this disclosure provides systems, methods and computer readable media for secure patch downloading from a host to a target, with improved security computation operations based on transport conditions. The method may include receiving a packet of the patch from the host; verifying that the packet is not a retransmission of a previously received packet; if the verification succeeds, performing a first type of security computation based on the packet; if the verification fails and the content of the packet differs from the content of the previously received packet, stopping further performance of the first type of security computation until a final packet of the patch is received; performing a second type of security computation based on one or more of the received packets; and determining a security status of the patch based on a comparison of the first type of security computation and the second type of security computation.

Abstract: A system and method for detecting a condition of an extension telephone is presented for processing caller ID information. A reference value of a telephone line connected to an apparatus is first determined. An auxiliary telephone connected to the apparatus is then disconnected. A second value of the telephone line is determined while the auxiliary telephone is disconnected. The reference value and the second value of the telephone line are compared to determine the condition, such as off-hook, of the extension telephone.