Verisign, Inc.

Georgia Tech Research Corporation

Ramakant Pandrangi

Frank Scalzo

Eric Osterweil

Yannis Labrou

Suresh Bhogavilli

David Blacka

Roberto Guimaraes

Paul Livesay

Denis Phillips

Nicholas G Feamster

Shuang Hao

Systems and methods for enhanced monitoring and adaptive management of inter-network Domain Name System ('DNS') traffic include an information capture device in a monitored network. The information capture device receives a redirected connection request originated by a client machine in the monitored network in response to a modified DNS answer from a recursive name server outside of the monitored network, captures detailed information associated with the redirected connection request that is inaccessible to the recursive name server, and sends the captured information to a data storage accessible to the recursive name server for storage as augmented DNS data associated with the client machine and/or the redirected connection request. The information capture device further provides, in response to the redirected connection request, an adaptive answer generated based on the augmented DNS data to the client machine.

Enhanced inter-network monitoring and adaptive management of DNS traffic

Methods and systems for detecting and responding to Denial of Service ('DoS') attacks comprise: detecting a DoS attack or potential DoS attack against a first server system comprising one or more servers; receiving, at a second server system comprising one or more servers, network traffic directed to the first server system; subjecting requesting clients to one or more challenge mechanisms, the challenge mechanisms including one or more of challenging requesting clients to follow through HTTP redirect responses, challenging requesting clients to request Secure Sockets Layer (SSL) session resumption, or challenging requesting clients to store and transmit HTTP cookies; identifying one or more non-suspect clients; and forwarding, by the second server system, traffic corresponding to the one or more non-suspect clients to the first server system. Once a client has been validated, clients may communicate directly with application servers in a secure manner by transparently passing through intermediary proxy servers.

Active validation for DDoS and SSL DDoS attacks

Systems, methods, and computer-readable mediums are provided that access a set of data related to a plurality of domain name system (DNS) requests for a plurality of subnets in a network. A subset of the set of data that is a representative sample of the set of data is selected. Latency of the subset of the data is estimated and latency is estimated for the totality of the data. A portion of the network is modified based on the estimated latency of the totality of the data.

Query latency of a DNS service

Implementations relate to systems and methods for pre-signing of DNSSEC enabled zones into record sets. A domain name system (DNS) can receive and/or impose a set of DNS policies desired by an administrator, or the DNS operator itself to govern domain name resolution with security extensions (DNSSEC) for a Web domain. The DNS can generate a set of answers to user questions directed to the domain based on the set of policies. Those answers which differ or vary based on policy rules can be stored as variant answers, and can be labeled with a variant ID. The variant answers can be pre-signed and stored in the DNS. Because key data and other information is generated and stored before a DNS request is received, the requested variant answer can be returned with greater responsiveness and security.

Systems and methods for pre-signing of DNSSEC enabled zones into record sets

The disclosure is directed to securely bootstrapping devices in a network environment. Methods and systems include hardware and/or operations for receiving, based on an identifier provisioned at a relying entity, instances of a security credential of an information system, wherein the instances are associated with respective certifying entities. The operations also include verifying the authenticity of the instances of the security credential using information of the certifying entities provisioned at the relying entity. The operations further includes determining matches between the instances of the security credential. Additionally, the operations include determining based on the matches that a first instance of the security credential satisfies a policy provisioned at the relying entity. Further, the operations include verifying the authenticity of information requested from the information system using the first instance of the security credential. In various implementations, the information system may be the domain name system.

Methods and systems for bootstrapping

Methods and systems for providing a secure SSL certificate escrow service comprise: providing a secure upload webpage for a private key holder to upload an encrypted copy of a private key; receiving the encrypted copy of the private key from the private key holder via the secure upload webpage; storing the encrypted copy of the private key in memory; providing a secure decryption webpage for the private key holder to enable the private key escrow service to decrypt the private key; receiving an instruction to decrypt the private key from the private key holder through the secure decryption webpage; and decrypting the private key in response to the instruction to decrypt the private key.

Management of SSL certificate escrow

A method and system to mitigate an attack over the Internet includes collecting information related to a plurality of client IP addresses from a plurality of sources and analyzing the collected information to determine confidence scores for the plurality of client IP addresses. The method and system also include receiving network traffic from the Internet and limiting network traffic from a first subset of the plurality of client IP addresses characterized by a confidence score less than a first threshold. The method, and system further include determining a level of the network traffic and limiting network traffic from a second subset of the plurality of client IP addresses characterized by a confidence score less than a second threshold greater than the first threshold.

IP prioritization and scoring system for DDoS detection and mitigation

Systems and methods are disclosed for identifying domains as malicious based on Internet-wide DNS lookup patterns. Disclosed embodiments look for variance in the servers that look up a domain and also look at the popularity growth (quantity of queries from unique addresses) of a domain after registration to identify malicious domains. Other disclosed embodiments measure the similarity of servers that query a domain and cluster domains based on the similarity of those servers. Disclosed embodiments may use such temporal and spatial lookup patterns as input to a blacklist process to more effectively and quickly blacklist domains based on their Internet-wide lookup patterns.

Growing community of inventors

Vienna, VA, United States of America

Ramakant Pandrangi