Browse Definitions:
Definition

DNS Security Extensions (DNSSEC)

DNS Security Extensions (DNSSEC) are a set of Internet Engineering Task Force (IETF) standards created to address vulnerabilities in the Domain Name System (DNS) and protect it from online threats. The purpose of DNSSEC is to increase the security of the Internet as a whole by addressing DNS security weaknesses. Essentially, DNSSEC adds authentication to DNS to make the system more secure.  

The Domain Name System manages Internet navigation by locating domain names and mapping them to IP addresses. DNS, as originally designed, has no means of determining whether domain name data comes from the authorized domain owner or has been forged. This security weakness leaves the system vulnerable to a number of attacks, such as DNS cache poisoning, for example. 

In a DNS cache poisoning attack, an intruder replaces a valid IP address cached in a DNS table with a rogue address. Requests for the valid address are redirected accordingly, and malware -- such as a worm, spyware or browser hijacker -- may be downloaded to the user's computer from the rogue location. DNSSEC employs cryptographic keys and digital signatures to ensure that lookup data is correct and that connections are to legitimate servers.

The core elements of DNSSEC were specified in three IETF Requests for Comments published in March 2005: RFC 4033 - DNS Security Introduction and Requirements, RFC 4034 - Resource Records for the DNS Security Extensions, and RFC 4035 - Protocol Modifications for the DNS Security Extensions.

DNSSEC implementation is somewhat complex and is on a voluntary basis. As a result, adoption has been slow. In the United States, the federal government has mandated DNSSEC implementation for government networks. The National Institute of Standards and Technology (NIST) and the General Services Administration (GSA) have implemented the standards within the top level dot.gov domain. However, most individual agencies have yet to meet the mandate for second-level domains.

DNSSEC is offered as a managed service; DNSSEC appliances that automate the process are also available from some  vendors.

This was last updated in January 2016

Continue Reading About DNS Security Extensions (DNSSEC)

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

Dateiendungen und Dateiformate

Gesponsert von:

SearchCompliance

  • PCAOB (Public Company Accounting Oversight Board)

    The Public Company Accounting Oversight Board (PCAOB) is a Congressionally-established nonprofit that assesses audits of public ...

  • cyborg anthropologist

    A cyborg anthropologist is an individual who studies the interaction between humans and technology, observing how technology can ...

  • RegTech

    RegTech, or regulatory technology, is a term used to describe technology that is used to help streamline the process of ...

SearchSecurity

  • Advanced Encryption Standard (AES)

    The Advanced Encryption Standard, or AES, is a symmetric block cipher used by the U.S. government to protect classified ...

  • identity theft

    Identity theft, also known as identity fraud, is a crime in which an imposter obtains key pieces of personally identifiable ...

  • spear phishing

    Spear phishing is an email-spoofing attack that targets a specific organization or individual, seeking unauthorized access to ...

SearchHealthIT

SearchDisasterRecovery

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

  • mass notification system (MNS)

    A mass notification system is a platform that sends one-way messages to inform employees and the public of an emergency.

  • disaster recovery as a service (DRaaS)

    One approach to a strong disaster recovery plan is DRaaS, where companies offload data replication and restoration ...

SearchStorage

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an ...

  • GlusterFS (Gluster File System)

    GlusterFS (Gluster File System) is an open source distributed file system that can scale out in building-block fashion to store ...

  • virtual memory

    Virtual memory is a memory management capability of an OS that allows a computer to compensate for physical memory shortages by ...

SearchSolidStateStorage

  • Tier 0

    Tier 0 (tier zero) is a level of data storage that is faster, and perhaps more expensive, than any other level in the storage ...

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • SSD caching

    SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so ...

SearchCloudStorage

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

  • Zadara VPSA and ZIOS

    Zadara Storage provides block, file or object storage with varying levels of compute and capacity through its ZIOS and VPSA ...

Close