Other

Level 3 Communications, LLC

Centurylink Intellectual Property LLC

John R Woodworth

Dean Ballew

Mark Dehus

Shashwath Bindinganaveli Raghavan

The present application describes a system and method for passively collecting DNS traffic data as that data is passed between a recursive DNS resolver and an authoritative DNS server. The information contained in the collected DNS traffic data is used to generate a virtual authoritative DNS server, or a zone associated with the authoritative DNS server, when it is determined that the authoritative DNS server has been compromised.

Collecting passive DNS traffic to generate a virtual authoritative DNS server

A system for numeric pattern normalization for cryptographic signatures is provided. The system includes a resolving client, and an at least one signature server. The at least one signature server includes at least one processor and non-transitory computer readable media having encoded thereon computer software comprising a set of instructions executable by the at least one processor. The set of instructions may be executed by the signature server to generate a message to be transmitted to a resolving client, normalize the message via numeric pattern normalization, generate a hash value for the normalized message, and generate a cryptographic signature based on the hash value. The signature server may then generate a signed message having the message signed with the cryptographic signature, and transmit the signed message to the resolving client.

Numeric pattern normalization for cryptographic signatures

A high temperature and high pressure process utilizes dehaloganation, oxidation, or similar reactions to chemically alter hazardous organic chemicals to render them non-hazardous. The method is particularly adaptable to the treatment of sediments in bodies of water and includes process steps to destroy contaminants such as PCBs in one product stream and to capture heavy metals for disposal in a smaller second product stream.

Process for treating low solids content hazardous materials

The multilevel data encoding and modulation technique uses a pair of complementary logic sets. In its most basic form, the sets are binary sets each containing a line level for a logical one and a line level for a logical zero for a total of four logic levels. The encoding technique requires a polar change in the line level after every bit. An optional fifth level may be used in order to skew the frequency or to enable automatic gain control circuitry to ensure consistent level discrimination. The encoding technique may be used in a bipolar device, or a bias level may be applied to the signal for unipolar transmission. The encoding technique involves inverting the polarity of alternating bits, filtering out all odd harmonics, transmitting and receiving the waveform, and decoding the demodulated waveform by comparing the absolute value of the half-cycle peak-to-peak voltage gain to a predetermined table.

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Amissville, VA, United States of America

John R Woodworth