Feb 06, 2014 Re: lost combination on a Meilink safe by Squelchtone » Thu Feb 06, 2014 1:32 pm If you've never done safe work or manipulation before, you won't learn it here from reading a post or two. Apr 29, 2019 If your safe has an electronic lock, the safe serial number or the serial number of the electronic safe lock itself, can be used to see if there is a master override code for the safe. Entering the override code will reset the electronic lock so that the locks default combination will work. Changing Meilink safe combination Posted by 406 Murphy St, Blacksburg, VA on November 02, 2009 at 06:27:59: I have a Meilink safe that is open but we no longer know the combination.
- Meilink Steel Safe Company Website
- Serial Numbers For Meilink Safes
- Default Combination For Meilink Safe Mode
In rec.crafts.metalworking, Tim Wescott <[email protected]> wrote:
> On Thu, 20 Mar 2014 09:42:26 -0500, Ignoramus10422 wrote:
> > I bought this Meilink safe at auction. Sadly, the safe is locked and the
> > combination is not available.
> The VERY FIRST thing you do is call the manufacturer and ask them if theyAfter that, hire a safecracker off craigslist:
> have a default combination when they ship the safe. Most safes with
> combinations that can be changed ship with the factory combination, and
> many people (particularly if it's a fire safe) don't bother with changing
> it.
http://blog.sfgate.com/cityexposed/2014/03/09/safecracker-wanted-for-25-percent-of-treasure/
Excerpt:
Wyatt, 51, is a man with time on his hands. He defines himself as a
marginally employed computer repairman, a tinkerer in all things
mechanical and an unrepentant coffee-shop slacker. He learned
everything he knows about safecracking from a 34-page PDF document he
found while doing a Google search on 'safecracking for the computer
scientist.'
[..]
Rodgers recently bought a mid-century home in the Upper Castro
neighborhood, which came complete with a 1-ton antique safe that
prevented him from parking his car in the garage. He was offering 25
percent of the unknown contents to any person who could open the
safe. The only catch was that the safecracker had to haul away the
cracked safe when the job was done.
[..]
At 10:22 a.m., Wyatt cried out, 'I got it!' Rodgers came running over
just as the several-hundred-pound door fell off the safe - a
contractor had removed the hinges in a previously failed attempt to
get in.
Wyatt's reward was indeed 25 percent of the air in the safe. Apart
from that, nothing was inside.
Still, Wyatt had a giant grin on his face as he held the inner
workings of a lock like a shiny piece of gold. His curiosity had been
quenched.
Elijah
------
no word how Wyatt, on his bicycle, was getting the safe out of there
A safe with destroyed electronic components
Safe-cracking is the process of opening a safe without either the combination or the key.
Physical methods[edit]
Different procedures may be used to crack a safe, depending on its construction. Different procedures are required to open different safes so safe-crackers need to be aware of the differences.
Lock manipulation[edit]
Lock manipulation is the stereotypical safe cracking technique commonly portrayed in movies. It is a damage free combination recovery method, and a well known surreptitious bypass technique. Manipulation only requires fingers, eyes, and proper technique though it is a skill that takes years to develop and decades to master. While manipulation of combination locks is usually performed on Group 2 locks, many Group 1 locks are susceptible to manipulation. Expert practitioners of this art can open locks with speed and consistency. These professionals manually manipulate[1] the lock in order to obtain the combination one number at a time. Manipulation procedures can vary, but they all rely on exploiting the presence of mechanical imperfections in the lock. Manipulation will unlock a safe and recover its combination. Once the combination is recovered it may be reused to open the safe lock. Similar damage free bypass can also be completed by a computerized auto-dialer or manipulation robot. These auto-dialer[2] machines are known to take 24 hours or more to reach the correct combination. In recent years faster devices have been engineered for lock bypass. These new devices use more advanced robotics and more advanced software. When used in cooperation with each other the two technologies closely mimic manual manipulation. These devices mimic human manipulation by 'feeling' and measuring mechanical movement within the lock.
Mechanical safe locks are manipulated primarily by feel and vision, with sound helping the process occasionally. To find the combination the operator uses the lock against itself by measuring internal movements with the dial numbers. More sophisticated locks use advanced mechanics to reduce any feedback a technician could use to identify a combination. These group 1[3] locks were developed in response to group 2[4] lock manipulation.[5] Wheels made from lightweight materials will reduce valuable sensory feedback, but are mainly used for improved resistance against radiographic attacks. [6] Manipulation is often the preferred choice in lost-combination lockouts, since it requires no repairs or damage, but can be time consuming for an operator, the specific difficulty depends on the unique wheel shapes and where the gates rest in relation to them. A novice's opening time will be governed by these random inconsistencies, while some leading champions of this art show admirable consistency. There are also a number of tools on the market to assist safe engineers in manipulating a combination lock open in the field.
Nearly all combination locks allow some 'slop' while entering a combination on the dial. On average 1% radial rotation in either direction from the center of the true combination number to allow the fence to fall despite slight deviation, so that for a given safe it may be necessary only to try a subset of the combinations.[7] Such 'slops' may allow for a margin of error of plus or minus two digits, which means that trying multiples of five would be sufficient in this case. This drastically reduces the time required to exhaust the number of meaningful combinations. A further reduction in solving time is obtained by trying all possible settings for the last wheel for a given setting of the first wheels before nudging the next-to-last wheel to its next meaningful setting, instead of zeroing the lock each time with a number of turns in one direction.
Guessing the combination[edit]
Safes may be compromised surprisingly often by simply guessing the combination. This results from the fact that manufactured safes often come with a manufacturer-set combination. These combinations (known as try-out combinations) are designed to allow owners initial access to the safes so that they may set their own new combinations. Sources exist which list manufacturers' try-out combinations.
Combinations are also unwittingly compromised by the owners of the safes by having the locks set to easy-to-guess combinations such as a birthdate, street address, or driver's license number.
List of common factory-default combinations[edit]
- 50-25-50
- 50-50-50
- 20-50-25
- 10-20-30
- 25-50-75
- 20-40-60
- 20-60-40
- 40-20-60
- 40-60-20
- 60-20-40
- 60-40-20
Autodialers[edit]
Meilink Steel Safe Company Website
A number of companies and groups have developed autodialing machines to open safes. Unlike fictional machines that can open any combination in a matter of seconds, such machines are usually specific to a particular type of lock and must cycle through thousands of combinations to open a device. A good example of such a device is a project completed by two students from the Massachusetts Institute of Technology, Kyle Vogt and Grant Jordan. Their machine, built to open a Sargent and Greenleaf 8500 lock on a Diebold Safe, found an unknown combination in 21,000 tries. Lockmasters, Inc. markets one autodialing machine [QX3 Combi Autodialer (LKMCOMBI)] that work on a variety of 3 and 4 Wheel combination safe locks.[8]
There also exist computer-aided manipulation tools such as Mas Hamilton's SoftDrill (no longer in production). These tools are similar to autodialers, except they make measurements of the internal components of the lock, and deduce the combination in a similar way to that of a human safe technician.
Weak-point drilling[edit]
Safe-drilling w/ drill rig
While some safes are hard to open, some are susceptible to compromise by drilling or other physical methods. Manufacturers publish drill-point diagrams for specific models of safes. These are tightly guarded by both the manufacturers and locksmithing professionals. Drilling is usually aimed at gaining access to the safe by observation or bypass of the locking mechanism. Drilling is the most common method used by locksmiths, and is commonly used in cases of burglary attempts, malfunctioning locks or damaged locks.
In observational attacks, the drill hole allows the safecracker to view the internal state of the combination lock. Drill-points are often located close to the axis of the dial on the combination lock, but observation may sometimes require drilling through the top, sides or rear of the safe. While observing the lock, the locksmith manipulates the dial to align the lock gates so that the fence falls and the bolt is disengaged.
Bypass attacks involve physical manipulation of the bolt mechanism directly, bypassing the combination lock.
All but the simplest safes are designed to protect against drilling attacks through the implementation of hardplate steel (extremely wear-resistant) or composite hardplate (a casting of metal such as cobalt-vanadium alloys with embedded tungsten carbide chips designed to shatter the cutting tips of a drill bit) within the safe, protecting the locking mechanism and other critical areas such as the locking bolts. The use of hardplate ensures that conventional drilling is not successful when used against the safe. Drilling through hardplate requires the use of special-purpose diamond or tungsten-carbide drill-bits. Even then, this can be a time-consuming and difficult process with safes equipped with modern composite hardplates.
Some high-security safes use a glass relocker. This is a piece of tempered glass mounted between the safe door and the combination lock. It has wires attached to the edges. These wires lead to randomly located, spring-loaded bolts. If an attempt is made to penetrate the safe, the penetrating drill or torch could break the glass and release the bolts. These bolts block the retraction of the main locking bolts. To drill a safe with a glass relocker, side, top, or rear drilling may be necessary. A gas abrasive drill can sometimes be used to drill through a glass relocker without triggering it.
Many modern high-security safes also incorporate thermal relockers in conjunction with glass-based relockers (usually a fusible link as part of the relocker cabling), which also activate when the temperature of a safe exceeds a certain level as a defense against torches and thermal lances.
Drilling is an attractive method of safecracking for locksmiths, as it is usually quicker than manipulation, and drilled safes can generally be repaired and returned to service.
Punching, peeling and using a torch are other methods of compromising a safe. The punch system is widely used by criminals for rapid entry. Punching was developed by Pavle Stanimirovic and used in New York City. Rar download for mac os. Peeling is a method that involves removing the outer skin of the safe.
Plasma cutters and thermal lances can be as hot as 2,200 °C (3,990 °F), much hotter than traditional oxyacetylene torches, and can be used to burn through the metal on a safe.
Scoping[edit]
Scoping a safe is the process of drilling a hole and inserting a borescope into the safe to get an intimate look into a specific part of the security container. When manipulation proof mechanical locks and glass re-lockers are implemented as security measures, scoping is the most practical option. One common method is called 'scoping the change key hole.' The safecracker will drill a hole allowing him to get his scope into a position to observe the change key hole. While spinning the dial and looking through the change key hole for certain landmarks on the combination lock's wheel pack, it is possible to obtain the combination and then dial open the safe with the correct combination. This method is common for a professional safe specialist because it leaves the lock in good working order and only simple repairs are needed to bring the safe barrier back to its original condition. It is also a common way to bypass difficult hard plates and glass re-lockers since the change key hole can be scoped by drilling the top, side, or back of the container.
Brute force methods[edit]
Other methods of cracking a safe generally involve damaging the safe so that it is no longer functional. These methods may involve explosives or other devices to inflict severe force and damage the safe so it may be opened. Examples of penetration tools include acetylene torches, drills, and thermal lances. This method requires care as the contents of the safe may be damaged. Safe-crackers can use what are known as jam shots to blow off the safe's doors.
Most modern safes are fitted with 'relockers' (like the one described above) which are triggered by excessive force and will then lock the safe semi-permanently (a safe whose relocker has tripped must then be forced, the combination or key alone will no longer suffice). This is why a professional safe-technician will use manipulation rather than brute force to open a safe so they do not risk releasing the relocker.
Radiological methods[edit]
Penetrating radiation such as X-ray radiation can be used to reveal the internal angular relationship of the wheels gates to the flys mechanism to deduce the combination. Some modern safe locks are made of lightweight materials such as nylon to inhibit this technique, since most safe exteriors are made of much denser metals. The Chubb Manifoil Mk4 combination lock contains a lead shield surrounding part of the lock to defeat such attempts to read its wheels.
Tunneling into bank vaults[edit]
Large bank vaults which are often located underground have been compromised by safe-crackers who have tunneled in using digging equipment. This method of safe-cracking has been countered by building patrol-passages around the underground vaults. These patrol-passages allow early detection of any attempts to tunnel into a vault.
Safe bouncing[edit]
A number of inexpensive safes sold to households for under $100 use mechanical locking mechanisms that are vulnerable to bouncing. Many cheap safes use a magnetic locking pin to prevent lateral movement of an internal locking bolt, and use a solenoid to move the pin when the correct code is entered. This pin can also be moved by the impact of the safe being dropped or struck while on its side, which allows the safe to be opened.[9][10][11] One security researcher taught his three-year-old son how to open most consumer gun safes. More expensive safes use a gear mechanism that is less susceptible to mechanical attacks.
Electronic methods[edit]
Electronic locks are not vulnerable to traditional manipulation techniques. These locks are often compromised through power analysis attacks[12][13]. Several tools exist that can automatically retrieve or reset the combination of an electronic lock; notably, the Little Black Box[14] and Phoenix. Tools like these are often connected to wires in the lock that can be accessed without causing damage to the lock or container. Nearly all high-end, consumer-grade electronic locks are vulnerable to some form of electronic attack.
TEMPEST[edit]
The combinations for some electronic locks can be retrieved by examining electromagnetic emissions coming from the lock. Because of this, many safe locks used to protect critical infrastructure are tested and certified to resist TEMPEST attacks. These include the Kaba Mas X-10 and S&G 2740B, which are FF-L-2740B compliant.
Keypad-based attacks[edit]
If an electronic lock accepts user input from a keypad, this process can be observed in order to reveal the combination. Common attacks include:
- Visually observing a user enter the combination (shoulder surfing)
- Hiding a camera in the room which records the user pressing keys
- Examining fingerprints left on the keys
- Placing certain gels, powders, or substances on the keys that can be smudged or transferred between keys when the combination is entered, and observed at a later time.
- Placing a 'skimmer' (akin to those used for credit card fraud) behind the keypad to record the digital signals that are sent to the lock body when the combination is entered.
- Examining wear or deformity of buttons which are pressed more often than others
Serial Numbers For Meilink Safes
Many of these techniques require the attacker to tamper with the keypad, wait for the unsuspecting user to enter the combination, and return at a later time to retrieve the information. These techniques are sometimes used by members of intelligence or law enforcement agencies, as they are often effective and surreptitious.
High-security keypads[edit]
Some keypads are designed to inhibit the aforementioned attacks. This is usually accomplished by restricting the viewing angle of the keypad (either by using a mechanical shroud or special buttons), or randomizing the positions of the buttons each time a combination is entered.
Some keypads use small LED or LCD displays inside of the buttons to allow the number on each button to change. This allows for randomization of the button positions, which is normally performed each time the keypad is powered on. The buttons usually contain a lenticular screen in front of the display, which inhibits off-axis viewing of the numbers.
Ntfs for mac oc. The Mac has built in NTFS read capability, but not write. For that, you’ll need Paragon NTFS. 5 points 2 years ago. This is what I use, and I thinks it’s the best solution. 1 point 2 years ago. Save hide report. Posted by 1 day ago. Microsoft NTFS for Mac by Paragon Software is the best such software solution: reliable, fast, and now affordable as well Fast, seamless, and easy to use, Microsoft NTFS for Mac by Paragon Software is required for those who need to write to Windows volumes. And now it’s more affordable than ever. MacWorld, USA 2016, macworld.com.
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When properly implemented, these keypads make the 'shoulder surfing' attack infeasible, as the combination bears no resemblance to the positions of the keys which are pressed.
While these keypads can be used on safes and vaults, this practice is uncommon.
Media depictions[edit]
Movies often depict a safe-cracker determining the combination of a safe lock using his fingers or a sensitive listening device to determine the combination of a rotary combination lock. Other films also depict an elaborate scheme of explosives and other devices to open safes.
Some of the more famous works include:
- Payday: The Heist (2011)
- Payday 2 (2013-2016)
- A Retrieved Reformation (1909)
- The Asphalt Jungle (1950)
- Rififi (1955)
- The Cracksman (1963)
- You Only Live Twice (1967)
- Who's Minding the Mint? (1967)
- Olsen Gang
- Olsen-banden
- Olsenbanden
- Jönssonligan
- Butch Cassidy and the Sundance Kid (1969)
- On Her Majesty's Secret Service (1969) - Auto-dialer
- The Burglars (1971)
- Cool Breeze (1972)
- Thunderbolt and Lightfoot (1974)
- No Deposit, No Return (1974)
- Thief (1981)
- Vabank (1981)
- Blood Simple (1984)
- Short Circuit 2 (1988)
- Die Hard (1988) - Drilling, guessing electronic passwords
- Disorganized Crime (1989)
- Breaking In (1989) - Drilling, hammering (a cheap safe), nitroglycerin explosives, torch-cutting (with this method the contents were destroyed), social engineering
- Hudson Hawk (1991)
- Killing Zoe (1994)
- Heat (1995) - Drilling, physical sabotage of external security systems
- Safe Men (1998)
- The Newton Boys (1998)
- Blue Streak (1999)
- Small Time Crooks (2000)
- Ocean's Eleven (2001) - Social engineering, physical sabotage of security systems
- The Score (2001) - Drilling, thermal lance, internal explosion. This method shown at the climax of the film was tested on an episode of MythBusters (see below).
- Panic Room (2002) - Drilling, brute force, physical destruction of electronic security systems
- The Italian Job (2003)
- Bad Santa (2003) (2003)
- Brainiac: Science Abuse (2003) – The safe was eventually cracked by a high-explosive round fired using a Challenger 2 Tank. The contents were destroyed.
- The Ladykillers (2004)
- The Bank Job (2008)
- Burn Notice (2007–2013)
- Dom Hemingway (2013)
- Sexy Beast (2000) -- Tunnelling into a bank vault, and physical destruction of security devices by flooding
Three safecracking methods seen in movies were also tested on the television show MythBusters, with some success.[15][16] While the team was able to blow the door off of a safe by filling the safe with water and detonating an explosive inside it, the contents of the safe were destroyed and filling the safe with water required sealing it from the inside. The safe had also sprung many leaks.
See also[edit]
References[edit]
- ^Archived from the original on December, 9, 2016
- ^Archived August 1, 2017
- ^archived from original June 28, 2017
- ^archived from original on June 28, 2017
- ^archived from original on August 9, 2016.
- ^Archived from the original on June 28, 2017.
- ^Richard P. Feynman as told to Ralph Leighton; edited by Edward Hutchings (1985). 'Surely you're joking, Mr. Feynman!': adventures of a curious character. New York: W.W. Norton. ISBN0-393-01921-7.CS1 maint: multiple names: authors list (link)
- ^'Dialer ITL-2000II' (Press release). Zieh-Fix, Inc. Retrieved 2020-10-12.
- ^Marc Weber Tobias. 'Unsafe Gun Safes Can Be Opened By A Three-Year Old'. Forbes.
- ^'Kids Can Open Gun Safes With Straws and Paper Clips, Researchers Say'. WIRED. 27 July 2012.
- ^How to break into most digital safe's. YouTube. 1 March 2012.
- ^DEFCONConference (2016-11-10), DEF CON 24 - Plore - Side channel attacks on high security electronic safe locks, retrieved 2019-05-18
- ^EEVblog (2015-07-05), EEVblog #762 - How Secure Are Electronic Safe Locks?, retrieved 2019-05-18
- ^'Lockmasters. Lockmasters Little Black Box; LKM522BATMAG'. www.lockmasters.com. Retrieved 2019-05-18.
- ^'Crimes and Myth-Demeanors 1'. Mythbusters. Season 4. Episode 54. July 12, 2006.
- ^'Crimes and Myth-Demeanors 2'. MythBusters. Season 4. Episode 59. August 23, 2006.
Default Combination For Meilink Safe Mode
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Safe-cracking&oldid=983272693'