Showing posts with label disaster recovery sites. Show all posts
Showing posts with label disaster recovery sites. Show all posts

Saturday, September 6, 2014



InfoBunker

The lure of underground data centers

Subterranean facilities provide security and energy savings — and they’re cool, too.

- Tech Page One Aug 26 2014


Every evil genius deserves his own subterranean bunker with a supercomputer to plot world domination. The economy being the way it is these days, however, most can’t afford to build their own lair. Fortunately, there are plenty of underground facilities that you can share with other businesses and organizations. There is a coolness about these locations, and not just because the ground temperature is in the 50s year round.
“There is a certain James Bond allure to the underground data center,” said John Clune, president of Cavern Technologies. “Many of our customers utilize the location in their marketing to show how seriously they take data storage and protection.”
One of TelecityGroup’s five data centers in Helsinki, Finland, is housed under the Uspenski Cathedral. Credit: Shutterstock
Here are four companies in the U.S. and Europe that are running underground data centers.

Unorthodox location

London-based TelecityGroup operates five data centers in Helsinki, Finland. One of them is located in a former bomb shelter 100 feet below the 150-year-old Eastern Orthodox Uspenski Cathedral. By using sea water and a heat exchanger, it uses 80 percent less energy for cooling than a typical data center. But not all the heat is sent to the sea. The water first circulates to a heat exchanger serving the city’s district heating system, with the servers providing enough heat for 500 homes. The data center won an Uptime Institute Green Enterprise IT award in 2010.

Data mining

 

Cavern Technologies built a 50-megawatt, 300,000-plus square-foot data center in a former limestone mine near Lenexa, Kansas. Being 125 feet underground means that the site is secure from the tornados, ice storms and hail that can hit above-ground data centers in the region.
“From day one, we have a hardened F5 tornado-proof [261 to 318 miles per hour] structure,” said Clune. “Above ground, it costs up to $150 per square-foot for a hardened shell. On a 100,000-square-foot building, that is a cost savings of $15 million that we can pass on to our customers.”

Secure storage

 The Green Mountain Data Center is a Tier III+ facility located in a former NATO ammunition storage facility on an island in western Norway. Three-hundred-foot-long tunnels connect the data center rooms to the outside world. Although the site is physically remote, high-speed connections mean it is only 4.5 milliseconds from Aberdeen, Scotland and 6.5 milliseconds from London.

One of the main advantages of the site is its energy efficiency. Located on the shoreline, it draws 46- degrees -Fahrenheit water from a fjord, an arrangement that allows a 200-kilowatt pump to produce 26,000 kilowatts of cooling. The system is designed for high-density computing, up to 60 kilowatts per rack. Since it is deep underground, the cooling system never has to offset heating caused by the sun striking the walls and roof. In addition, Norway has abundant hydropower, so the data center operates without greenhouse gas emissions and the power costs about 40 percent less than it does in London.
“We wanted to build the greenest data center in the world and being underground helped in so many ways,” said Jonathan Evans, Green Mountain’s international accounts director.

Cold War bunker

When InfoBunker went looking for an ultra-secure location for a high-availability data center, it wound up taking over a building that was already designed for high-tech applications: a former military communications center near Des Moines, Iowa, that was built to survive a direct nuclear hit.
“From a functionality standpoint the building is performing exactly the same services it did while under military control, only now geared towards the private sector,” said Jeff Daniels, InfoBunker’s executive vice president. “From a cost perspective it was also far less expensive than a greenfield data center project as we could make use of almost all the existing base infrastructure and our [capital expenditure] was limited to upgrading/modernizing systems and building the actual data floor into what was essentially white-box space.”
Although at just 25 feet deep it is much closer to the surface than some of the other underground data centers, the amount of steel and concrete used gives it strength. Daniels said that to replace the building today, with all its hardening and critical systems would have cost over $100 million. But it did also require additional work to drill holes for pipes and conduits.
“The floor is two foot thickness of 6,000 PSI-rated concrete and has steel reinforcing bars the size of your wrist all through it,” said Daniels. “It eats core drill bits like popcorn.”
The facility is designed for 10 kilowatts per rack and uses outside air-cooling nine months of the year, using the heated air to warm the offices. The building stays at about 55 degrees Fahrenheit year-round and can act as a buffer to absorb some of the heat if the HVAC goes down. Waste heat from the servers is used to keep the office spaces comfortable.

Zombie apocalypse

Data centers such as these are even being touted as a place where people could potentially survive a “zombie apocalypse.”
“Despite advertising ourselves as a 20-megaton nuclear-hardened data center we do not anticipate ever being nuked,” said Daniels. “InfoBunker was however nominated one of the top six ‘zombie-proof’ green data centers worldwide.”

Friday, March 14, 2014

Deep underground in Butler County, the Iron Mountain National Data Center functions like its own little city. With more than 3,000 badged employees, the former mine has its own fire department, restaurant, transit systems, water treatment center, and medical center. (Justine Coyne/Pittsburgh Business Times).

But what may be most surprising about this unique facility, located outside of Pittsburgh in Boyers, is the treasures that are stored inside.
Formerly a limestone mine owned by United States Steel Corp. (NYSE: X) in the early 1900s, today the mine houses everything from original prints of classic motion pictures, to data storage for more than 2,300 business and government agencies across the U.S.
Located 220 feet underground, Nick Salimbene, director of business development for Iron Mountain, said what makes the facility so unique is that it is virtually impervious to natural disasters. Salimbene said being housed underground also provides a stable environment that naturally maintains a temperature of 52 degrees.
Of the 145 acres that are developed, Salimbene said about 70 percent is used for physical storage. But demand is shifting toward more data storage. He said the demand for data storage has been increasing between 20 percent and 30 percent annually in recent years. Today, he said about 80 percent of what is coming into the center today is data.
For the privacy of its customers, Iron Mountain does not disclose who uses the Boyers facility by name. But it includes many big names. One tenant Salimbene could discuss is Corbis Corp., which houses its collection of over 20 million photographs .
"There's a little bit of everything here," Salimbene said. "But the most important thing for us, is that our customers feel secure having their items located here."
Obviously, with such valuable objects in its facility, security is very tight at Iron Mountain, with armed guards keeping watch 24 hours a day, seven days a week.
"We have companies trusting us with their most valuable assets," Salimbene said. "That's not something we take lightly."

Wednesday, January 11, 2012

Europe Data Center Provider The Bunker Opens New High Specification Data Hall in Kent


The Bunker News – KENT, UK – The Bunker, provider of ultra secure Managed Hosting, Cloud Computing, Colocation, and Outsourced IT from within Europe’s most secure data centres, is pleased to announce that it has successfully opened a significant new high specification data hall in Kent.
The former military operations room at its South East facility becomes the latest high specification data hall to open in Europe’s most secure data centre. The new data hall has been fitted out with state of the art power and cooling infrastructure, providing up to 32 amps of UPS power per rack and N+1 fully redundant power and air conditioning.


The facility also benefits from hot and cold aisle separation, dual power feeds, generator back-up and over 150 ISP connections available.
The new data hall in Kent is part of The Bunker’s continuing investment programme, to meet the growing demand for high specification, ultra secure data facilities for fully managed and colocation customers.
Simon Neal, Director of Data Centre Services at The Bunker, said: “I’m delighted with the new data floor at our Kent facility. The ongoing investment allows us to expand our business and provide security conscious organisations with the reassurance of knowing that their hosting and managed services needs are being met in an ultra secure, high specification environment.”
Growing awareness of limited power availability and high prices in London is driving up demand for high power density, out-of-London locations. The Bunker is an obvious choice for organisations that require secure, high specification, managed services and colocation hosting facilities.
“The first customer has already moved in and we anticipate a rapid take-up of space and the opening of phase 2 in the near future.” continued Neal.

Bunker 2


State of the art and military grade
 The Bunker is expanding its Kent operations. The Bunker2 maintains the highest standards set by The Bunker by blending state of the art M & E infrastructure with military grade security. The new data centre facility provides an alternative highly secure, low risk Internet hub outside London servicing clients who wish to establish systems in the UK, but who also require access to the World Wide Web without entering the high risk London zones.

The Bunker2 offers 12,000m2 Tier 3 data floor within the existing defences of The Bunker’s facility, along with 2,000m2 of office and support accommodation, staffed 24/7/365 by security and technical personnel. The development will be of a modular low profile design, cut into the landscape with a grass roof. Each module of 2,200m2 blends into the surrounding environment with minimum visual impact.

London is the second largest Internet Exchange in the world. Unfortunately London is also one of the highest risk cities in the world.



The Bunker2 is a Carrier Neutral Data Centre, situated at a strategically important location on the cross roads of the main Internet fibre routes leaving the UK towards Europe, Asia and the USA. For our clients this affords peace of mind that traffic can be routed via the traditional channels across London, however in the event of a catastrophe, disabling the main Internet hubs in the London Docklands and the City, traffic can still route to any location in the world via the main Internet exchanges in Europe.
The next step for a trusted brand

The Bunker2 facility
The Bunker2 is owned and developed by The Bunker Secure Hosting Limited. The Bunker delivers secure Managed Hosting and Data Centre solutions from within Europe’s most secure Data Centre and has done so since 1994. Our technical leaders are recognised experts in security and cryptography, renowned for their work on Apache-SSL. Our management team includes Data Centre experts with over 10 years experience. The Bunker is ISO 27001 accredited, are recognized experts in Open Source technology, we are Microsoft Gold partners and practice Prince 2 and ITIL standards.

About The Bunker
The Bunker delivers Ultra Secure Managed Hosting, Cloud Computing, Colocation, and Outsourced IT from within Europe’s most secure data centres.

Our data centres, which are outside the M25 yet within easy reach of London, are military-grade nuclear bunkers purpose built to house the UK’s air defence systems. We run 24x7x365 – our NOC monitors systems both nationally and internationally and is staffed around the clock by system and network engineers and security staff. The Bunker is ISO 27001 and PCI DSS accredited and follows ITILv3 best practice and PRINCE2 project management standards.

Our clients are financial services organisations, technology companies, healthcare, government and other regulated businesses that value a premium service built around security.
For more information visit www.thebunker.net
 info@thebunker.net

Thursday, February 4, 2010

Disaster-Proof Data Centers

Disaster-Proof Data Centers
Companies Look To Bunker-Style Hosting Sites For Protection

CIOs who worry about what a bad storm, flood, or fire could do to their corporate data center might consider the ultimate in disaster recovery sites—the bomb shelter. There are a handful of underground data center hosting sites, built in old bomb shelters or mines, and their popularity with private businesses is on the rise. “We will see a lot more [bunker-style data centers] coming up,”

As the data center industry grows, it gets trickier to find ample space to house new facilities or provide companies with room to expand. Interestingly enough, underground locations are a viable option, since a lot of abandoned mines and military bunkers meet necessary criteria. Some underground locations were even built so that reuse would be easy. Directors of these facilities note that people tend to imagine the underground data centers to be dark, drippy holes in the ground, but this is definitely not accurate.

Although anyone with data storage needs might enjoy having such an interesting, high-security facility, so far, underground data centers are especially appealing to high-security organizations like the government. They are extremely well-protected in the event of disasters like hurricanes, tornadoes, and fires, as well as potential terrorist attacks.

Although there are a few issues with some of the underground data centers, like that some of them are in very rural areas, other problems one would imagine to exist, in reality, are not serious obstacles. Water is kept out easily enough, and can even be used for cooling. Limestone mines tend to be dry anyway. The main benefits are the amazing security, and the high amount of readily available space.

It all sounds like a lot of fun to move into, and data center migrations are what we're all about.

Key Points

  • Underground data centers offer ultimate protection against natural disasters and terrorist attacks.
  • Hosting companies are taking over old military bunkers or abandoned mines to create data centers.
  • Bunkers offer lower cooling costs plus extra security services such as biometric readers and armed guards.
  • A subterranean data center will be easier to secure against unauthorized entry and terrorist attacks.


The NBC Nightly News team travelled to one of Iron Mountain’s underground data centers to discover some of the treasures that are protected in this super-secure location. This is the same location where they protect thousands of our customers’ server and PC data.


Thursday, September 24, 2009

Underground Disaster-Proof Data Centers

Disaster-Proof Data Centers
Companies Look To Bunker-Style Hosting Sites For Protection

Key Points

• Underground data centers offer ultimate protection against natural disasters and terrorist attacks.

• Hosting companies are taking over old military bunkers or abandoned mines to create data centers.

• Bunkers offer lower cooling costs plus extra security services such as biometric readers and armed guards.

CIOs who worry about what a bad storm, flood, or fire could do to their corporate data center might consider the ultimate in disaster recovery sites—the bomb shelter. There are a handful of underground data center hosting sites, built in old bomb shelters or mines, and their popularity with private businesses is on the rise. “We see a lot more [bunker-style data centers] coming up,” says Michael Petrino, vice president of data center consulting firm PTS Data Center Solutions (www.ptsdcs.com), who says he’s worked with 10 such data centers over the past few years.

With names like The Underground and InfoBunker, their purpose is fairly clear—to offer total protection against any and all disasters that might bring down a regular data center. Petrino points to financial firms, utility companies, and any publicly traded company that is subject to Sarbanes-Oxley and other government regulations as being prime customers for hardened data centers. Continental Airlines, for example, has a backup data center inside the Montgomery Westland bunker (www.westlandbunker.com) in Montgomery, Texas, which is a former nuclear fallout shelter.

Other companies don’t have such sensitive operations as an airline or bank but still want the security of having an indestructible backup location. Wikia, which operates a consumer publishing platform, went looking for a disaster recovery center in 2007 and wound up renting space inside the United States Secure Hosting Center (www.usshc.com) in Monticello, Iowa. The Iowa center offers a central location between Wikia’s primary San Jose and secondary New Jersey data centers and pretty much guarantees that Wikia sites won’t be down should there be a major disaster on either coast.

“We wanted a disaster recovery location mainly to protect against fire and earthquake in the Bay area. Our entire business relies on being online, so we need to be able to continue to function if [our] primary data center goes away,” says Artur Bergman, the VP of engineering and operations at Wikia.

There were other factors behind the decision, namely service levels and costs. Bergman notes that the real estate costs are lower in Iowa, compared to California and New Jersey, leading to more attractive rates for data center space. But the fact that the center was underground and essentially disaster-proof was also an attractive feature. “If we are spending that money for disaster recovery, we felt it should fit that function as well as possible,” says Bergman.

Behind The Bunker

The majority of the data center bunkers in the U.S. were originally built as either bomb shelters or bomb-proof communications facilities for the government during the Cold War or are inside old mines or caves. USSHC, for instance, was originally one of several bunker locations established by the U.S. government to protect military and government telecommunications links in the event of a foreign attack on the U.S. Iron Mountain’s The Underground, the oldest bunker data center in the U.S., was formerly an iron ore mine.

Computer data and communications are at least as important as electricity to most businesses, and a disaster could put this important data at risk. Considering this, the idea of putting the corporate server inside a bunker may sound pretty good to many CIOs. Even fairly small-scale local disasters can quickly create a surge in interest for disaster-proof data centers. When Iowa experienced flooding last spring, and hundreds of businesses in Iowa City and Cedar Rapids found themselves with waves lapping at their doorsteps, USSHC began fielding a deluge of inquiries, often from businesses looking to move in that week.

“It often takes that kind of an event to get people interested,” says Isaac Helgens, project and marketing director at USSHC. “People often put off colocating because they love their servers, they want to hold them close. But these days, it’s not necessary to have your servers right with you. Anything you can do locally, you can do remotely.”

Helgens notes that a big advantage of a bunker data center is not so much its underground location—though that is important in the event of a hurricane or tornado—but that it is an independent structure, not shared with any other tenant. “We’ve seen good above-ground data centers, with good structures and fire detection, but their own neighbors on other floors presented a high risk. If you have a call center above your data center, for example, then you have a fire suppression system up there that may go off and wreak havoc on the floor below it. There’s also plumbing that can leak. Or another tenant could be running a fireworks factory for all you know,” says Helgens.

What You Get In A Bunker

Underground data centers typically feature 3- or 4-foot thick walls, fire proofing, and fire detection. Generators, fuel tanks, and cooling systems are usually either underground or just under the surface, to protect them from being destroyed by wind or lightening.

Besides the disaster-proof infrastructure, such centers also have high levels of service and security. InfoBunker (www.infobunker.com), in Des Moines, Iowa, offers biometric keypads and pan and zoom security cameras. Cavern Technologies (www.caverntechnologies.com) in Lenexa, Kan., has security guards, smart card access, and motion detectors. Iron Mountain’s The Underground in Pennsylvania provides armed guards, magnetometers, X-ray scanners, and visitor escorts.

As with regular data center providers, bunker centers provide various concierge services and data center staff to help customers manage their equipment. Should a customer at USSHC need to switch its operations to its backup site at USSHC, it provides the staff with work facilities, office space, phones, and other standard equipment. While it assumes that the customer’s staff will come in to man the backup operation, USSHC provides support staff to help get started.

Although the costs of security, services, and infrastructure tend to be higher with a bunker, there are savings in other areas. For instance, underground data centers are naturally cooler and can take advantage of geothermal energy. “Once you go underground, you have a much lower, steady temperature. It’s the same benefit a cave offers you. I’ve seen several reports that put the savings at upwards of 30% per year in energy usage,” says Petrino. Depending upon the region, utility rates may be cheaper, as well. In Iowa, for instance, customers can get power for $12 to $15 per amp, according to Helgens. At the same time, bandwidth rates may be higher if the bunker is in a remote location, as many are. USSHC pays two to three times the rates for bandwidth that they would if they were located in a major city.

For Wikia staff to fly to the Iowa data center, they would have to pay over $850 per person, with at least one connection. Instead, they have opted to fly into Chicago and drive the extra five hours by rental car. Because they only do it once or twice a year, it’s not a major issue, but for companies that want closer contact with their backup sites, it could be a problem.

For most customers considering a bunker, however, it’s the remote location that adds to the appeal, as it means there is less of a chance for a terrorist attack or security breach. New bunker data centers continue to be opened in rural or small-town spots—such as in tiny Hastings, Neb., where the newly launched Prairie Bunkers (www.prairiebunkers.com) plans to turn 184 WWII naval ammunition storage bunkers into individual data centers. Other companies are working on various underground data center projects, most hosted but a few being built for internal company use. Petrino says he’s aware of at least three financial firms and a government entity that are building their own bunkers.

“As the criticality of data comes into play for more and more businesses, offsite tape storage alone won’t be enough,” he says. “Clients are pushing for more and better data backup. Tapes get lost after all. So if you have these types of [online, secured] facilities, you can be more competitive.”

by Sue Hildreth

http://www.processor.com/editorial/article.asp?article=articles%2Fp3124%2F34p24%2F34p24%2F34p24.asp&guid=&searchtype=&WordList=&bJumpTo=True


U.S. Data Center Bunkers

Data Center Location URL
Cavern Technologies Lenexa, Kan. www.caverntechnologies.com
DataChambers Winston-Salem, N.C. www.datachambers.com
InfoBunker Des Moines, Iowa www.infobunker.com
Iron Mountain Butler County, Pa. www.ironmountain.com
Montgomery Westland Montgomery, Texas www.westlandbunker.com
Prairie Bunkers Hastings, Neb. www.prairiebunkers.com
StrataSpace Louisville, Ky. www.strataspace.com
SpringNet Underground Springfield, Mo. www.springnetunderground.net
US Secure Hosting Center Monticello, Iowa www.usshc.com

Underground Secure Data Center Operations

Technology based companies are building new data centers in old mines, caves, and bunkers to host computer equipment below the Earth's surface.

Underground Secure Data Center Operations have a upward trend.

Operations launched in inactive gypsum mines, caves, old abandoned coal mines, abandoned solid limestone mines, positioned deep below the bedrock mines, abandoned hydrogen bomb nuclear bunkers, bunkers deep underground and secure from disasters, both natural and man-made.

The facility have advantages over traditional data centers, such as increased security, lower cost, scalability and ideal environmental conditions. There economic model works, despite the proliferation of data center providers, thanks largely to the natural qualities inherent in the Underground Data Centers.

With 10,000, to to over a 1,000,000 square feet available, there is lots of space to be subdivided to accommodate the growth needs of clients. In addition, the Underground Data Centers has an unlimited supply of naturally cool, 50-degree air, providing the ideal temperature and humidity for computer equipment with minimal HVAC cost.

They are the most secure data centers in the world and unparalleled in terms of square footage, scalability and environmental control.

Yet, while the physical and cost benefits of being underground make them attractive, they have to also invested heavily in high-speed connectivity and redundant power and fiber systems to ensure there operations are not just secure, but also state-of-the-art.

There initially focused on providing disaster recovery solutions, and backup co-location services.

Clients lease space for their own servers, while other provides secure facilities, power and bandwidth. They offers redundant power sources and multiple high-speed Internet connections through OC connected to SONET ring linked to outside connectivity providers through redundant fiber cables.

Underground Data Centers company augments there core services to include disaster recovery solutions, call centers, NOC, wireless connectivity and more.

Strategic partnering with international, and national information technology company, enable them to offer technology solutions ranging from system design and implementation to the sale of software and equipment.

The natural qualities of the Underground Data Centers allow them to offer the best of both worlds premier services and security at highly competitive rates.

Underground Data Centers were established starting in 1990's but really came into there own after September 11 attacks in 2001 when there founders realized the former mines, and bunker offered optimal conditions for a data center. The mines, and bunkers offered superior environmental conditions for electronic equipment, almost invulnerable security and they located near power grids.

Adam Couture, a Mass.-based analyst for Gartner Inc. said Underground Data Centers could find a niche serving businesses that want to reduce vulnerability to any future attacks. Some Underground Data Centers fact sheet said that the Underground Data Center would protect the data center from a cruise missile explosion or plane crash.

Every company after September 11 attacks in 2001 are all going back and re-evaluating their business-continuity plans, This doesn't say everybody's changing them, but everybody's going back and revisiting them in the wake of what happened and the Underground Data Center may be just that.

Comparison chart: Underground data centers

Five facilities compared
Name InfoBunker, LLC The Bunker Montgomery Westland Cavern Technologies Iron Mountain The Underground
Location Des Moines, Iowa* Dover, UK Montgomery, Tex. Lenexa, Kan. Butler County, Penn.*
In business since 2006 1999 2007 2007 Opened by National Storage in 1954. Acquired by Iron Mountain 1998.
Security /access control Biometric; keypad; pan, tilt and zoom cameras; door event and camera logging CCTV, dogs, guards, fence Gated, with access control card, biometrics and a 24x7 security guard Security guard, biometric scan, smart card access and motion detection alarms 24-hour armed guards, visitor escorts, magnetometer, x-ray scanner, closed-circuit television, badge access and other physical and electronic measures for securing the mine's perimeter and vaults
Distance underground (feet) 50 100 60 125 220
Ceiling height in data center space (feet) 16 12 to 50 10 16 to 18 15 (10 feet from raised floor to dropped ceiling)
Original use Military communications bunker Royal Air Force military bunker Private bunker designed to survive a nuclear attack. Complex built in 1982 by Louis Kung (Nephew of Madam Chang Kai Shek) as a residence and headquarters for his oil company, including a secret, 40,000 square foot nuclear fallout shelter. The office building uses bulletproof glass on the first floor and reception area and 3-inch concrete walls with fold-down steel gun ports to protect the bunker 60 feet below. Limestone mine originally developed by an asphalt company that used the materials in road pavement Limestone mine
Total data center space (square feet) 34,000 50,000 28,000 plus 90,000 of office space in a hardened, above-ground building. 40,000 60,000
Total space in facility 65,000 60,000 28,000 3 million 145 acres developed; 1,000 acres total
Data center clients include Insurance company, telephone company, teaching hospital, financial services, e-commerce, security
monitoring/surveillance, veterinary, county government
Banking, mission critical Web applications, online trading NASA/T-Systems, Aker Solutions, Continental Airlines, Houston Chronicle, Express Jet Healthcare, insurance, universities, technology, manufacturing, professional services Marriott International Inc., Iron Mountain, three U.S. government agencies
Number of hosted primary or backup data centers 2 50+ 13 26 5
Services offered Leased data center space, disaster recovery space, wholesale bandwidth Fully managed platforms, partly managed platforms, co-location Disaster recovery/business continuity, co-location and managed services Data center space leasing, design, construction and management Data center leasing, design, construction and maintenance services
Distance from nearest large city Des Moines, about 45 miles* Canterbury, 10 miles; London, 60 miles Houston, 40 miles Kansas City, 15 miles Pittsburgh, 55 miles
Location of cooling system, includng cooling towers Underground Underground Above and below ground. All cooling towers above ground in secure facility. Air cooled systems located underground. Cooling towers located outside
Chillers located above ground to take advantage of "free cooling." Pumps located underground.
Location of generators and fuel tanks Underground Above ground and below ground Two below ground, four above ground. All fuel tanks buried topside. Underground Underground
*Declined to cite exact location/disatance for security reasons.