Crack Use Over Time

Уважаемый гость, на данной странице Вам доступен материал по теме: Crack Use Over Time. Скачивание возможно на компьютер и телефон через торрент, а также сервер загрузок по ссылке ниже. Рекомендуем также другие статьи из категории «Кейгены».

Crack Use Over Time.rar
Закачек 569
Средняя скорость 9081 Kb/s
Скачать

Crack Use Over Time

I am reading on the Ashley Madison password exposure case. Dean Pierce was able to output about 4000 cracked passwords within 5 days given his system. I’m assuming that he generated a table of hashes to compare 1 to 1. My question is, how long does it take to crack or fully test a bcrypted password given any cost [n]?

Bcrypt has an adjustable work factor. Standard benchmark uses weak work factor, but we can extrapolate. Take number for strong GPU [1].

13Kh/s with work factor 5 means 200H/s with strong work factor. 8 GPUs, so 1600H/s for the entire machine. 8 character mixed case with digits (62 options) is 62 raised to the 8th power: 218340105584896 combinations. Divided by 1600 per second is: 136462565990 seconds. 4300 years to try every combination. But of course, first common passwords and dictionary words would be checked. Those are cracked first. At 10 minutes per account, you can try the top 1 million popular passwords.

Note that weakly stored passwords can be more than 1 billion times faster to crack.

Think your password is secure enough?

You may want to think again. In 2014, nearly half of Americans had their personal info exposed by hackers – and that doesn’t even count the many companies that experienced breaches.

And with more and more businesses storing their information in the cloud and using SaaS solutions like business intelligence and hr software platforms, keeping your information safe becomes even more important.

Selecting an obscure and complex password and changing it frequently can spell the difference between keeping your data secure and having your personal information stolen. We’ve gathered insights and advice to empower you to tighten up your online security – and keep hackers out of your personal business.

To get started, we set out to discover just how quickly a seasoned cracker could “brute-force” various types of passwords (systematically check combinations until finding the correct one) based on factors such as length and character types. We also created an interactive feature that lets you estimate how long it would take someone to crack a password now compared with how long it took in the past. If you come up with an idea for a potential password, our tester can tell you just how secure it is. Just how many days, weeks, or years worth of security an extra letter or symbol make? How does password strength change over time? The answers just might surprise you.

How strong is a typical password now – and how strong was it in the 1980s? Enter a word (not your current password) and drag the slider to select a year to find out how long it would take for someone to crack the term if it were your password. It could take anywhere from infinite time to a millennium to mere fractions of a millisecond.

You can turn the “word list” function on or off as you test passwords. This tool works by cycling through a word list containing common words and passwords and then evaluating other factors such as character types. If you enter a password not on the word list, the cracking time will not be affected. But if your password is on the word list, it greatly affects cracking time.

How long should your password be?

When it comes to passwords, one thing is certain: Size matters. Adding a single character to a password boosts its security exponentially. In a so-called “dictionary attack,” a password cracker will utilize a word list of common passwords to discern the right one. The list above shows the difference that adding characters can make when it comes to security.

For instance, if you have an extremely simple and common password that’s seven characters long (“abcdefg”), a pro could crack it in a fraction of a millisecond. Add just one more character (“abcdefgh”) and that time increases to five hours. Nine-character passwords take five days to break, 10-character words take four months, and 11-character passwords take 10 years. Make it up to 12 characters, and you’re looking at 200 years’ worth of security – not bad for one little letter.

alpha and numberic characters

Combining numbers and letters rather than sticking with one type of character dramatically enhances password security. A string of nine letters or numbers takes milliseconds to crack. Add a single letter, and your password may become cryptic enough to thwart password crackers for nearly four decades.

However, it’s not as simple as swapping your “e” for a “3” or adding a number at the end of a string of letters. Password attacking methods actually take advantage of those common habits. Your best bet is to simply make your password less predictable and more complicated.

asci, lowercase, and numeric characters

Combining several types of characters is an extremely effective way to make your password more cryptic. A simple, common word can be cracked in fractions of a millisecond. Inject a mix of lowercase and uppercase letters, numbers, and symbols (think @, %, and #), and your password can be secure for more than a decade.

password strength over time

Not every security issue comes down to password character types and length – time is also a major factor. Over the years, passwords weaken dramatically as technologies evolve and hackers become increasingly proficient. For example, a password that would take over three years to crack in 2000 takes just over a year to crack by 2004. Five years later, in 2009, the cracking time drops to four months. By 2016, the same password could be decoded in just over two months. This demonstrates the importance of changing passwords frequently.

what if you get hacked?

One morning, you open your email, and everything has gone haywire: Friends are chatting you to say they’ve received spam from your address. Your login history looks odd. You have a pile of bounce-back messages in your inbox and a bunch of strange messages in your sent box. You’ve been hacked – so what should you do?

First, recover your email account, and change your password (use our guidelines to formulate a strong one). Complete all the steps, such as changing security questions and setting up phone notifications. Because email is filled with personal information, you should also notify your bank, PayPal, online stores, and any other accounts to discern whether a breach has occurred. Be sure to change other passwords as well. Finally, notify your contacts in case emails sent from your account have compromised their information too. While not getting hacked at all is the best-case scenario, promptly taking these steps can make the best of a bad situation.

Protect yourself

As time goes on, it only becomes more likely that your password will be hacked – putting your most personal information at risk. By taking a few steps to enhance your password, you can exponentially minimize the risk of a breach. When it comes to passwords, size trumps all else – so choose one that’s at least 16 characters. And be sure to choose a mix of character types (numbers, uppercase and lowercase letters, and symbols) to further enhance its security.

What else can you do? Steer clear of words found in the dictionary, pronouns, usernames, and other predefined terms, as well as commonly used passwords – the top two in 2015 were “123456” and “password” (yes, you read that right). Also, never use the same password in different places (that forgotten account at a site you never use could lead to a bank account breach). Consider using a password generator in order to get a complex password with no discernible pattern to help thwart password crackers. Finally, if memorizing long strings of characters proves too taxing, consider adopting a password manager that stores all your passwords. No password is perfect, but taking these steps can go a long way toward security and peace of mind.

Using processor data collected from Intel and John the Ripper benchmarks, we calculated keys per second (number of password keys attempted per second in a brute-force attack) of typical personal computers from 1982 to today.

The results from our interactive feature may differ from those of other online password-testing tools due to factors such as different equations, processors, and word lists.

Our data are based on the following equations:

Number of possible character combinations:

(Password Type)^(Password Length)

Password Type is the number of possible characters.

Effective Cores:

1/((1-Efficiency Constant)+(Efficiency Constant/Processor Cores)) The Efficiency Constant we used is 0.99, and we assume that 99% of the processor’s operations can be dedicated to the password crack.

Processor GFLOPS:

Processor Frequency * Effective Cores

Keys Per Second:

GFLOPS/Encryption Constant (gathered and calculated from John the Ripper benchmarks).

Time in seconds:

Feel free to share the images and interactive found on this page freely. When doing so, please attribute the authors by providing a link back to this page and Better Buys, so your readers can learn more about this project and the related research.

By LYNETTE HOLLOWAY

View page in TimesMachine

A 60-year-old Bronx woman shot and killed her adult daughter after begging her to abandon her crack habit, the police said yesterday.

The mother, Jean Lee, of 1055 University Avenue in High Bridge, was arrested Tuesday on murder charges after she shot her daughter, Avis Swan, 42, once in the lower right abdomen, said Sgt. John McCluskey, a police spokesman. The daughter died instantly in the mother’s apartment in a building overrun by drug use and drug dealers.

«She had hit the boiling point,» said Detective Michael Frain, who works with the 44th Precinct Detective Squad. «She had asked her daughter to quit, but the daughter said, ‘No, I love my crack too much.’ «

After her daughter fell to the floor mortally wounded, Mrs. Lee fled to a friend’s home, where she wept in remorse, Detective Frain said. She appeared to be intoxicated when investigators interviewed her three hours later, he said. Charged With Murder

«I can’t say she was drunk at the time of the shooting, but she did not appear to have complete control of her faculties when we interviewed her three hours after the shooting,» Detective Frain said. Mrs. Lee has been charged with murder and criminal possession of a weapon.

She pleaded not guilty at her arraignment late last night before Judge Lorin Duckman of Bronx Criminal Court and was remanded to police custody without bail.

The shooting confounded friends and neighbors. The police confiscated four slot machines and $250 in quarters from Mrs. Lee’s home that she used in a gambling operation, said Lieut. James Malvey, commander of the 44th Precinct Detective Squad.

Neighbors described Ms. Swan as a quiet woman who came to live with her mother six months ago to help care for her grandfather, John Bearfield, 84, who has Alzheimer’s disease. A widow, Ms. Swan lived in a housing project in Brooklyn with her daughter, Tiffany, 24, they said.

In some ways, Mrs. Lee’s story recalls that of Daisy Hutson, a Queens mother who last year shot and killed her crack-addicted daughter, who over the course of eight years had repeatedly threatened and robbed her. Mrs. Hutson said she had been distraught over the disintegration of her daughter’s life and was unable to convince her to seek help. She said she had wanted only to scare her daughter, not kill her. More Fed Up Than Afraid

In a plea bargain recommended by the Queens District Attorney, Mrs. Hutson pleaded guilty to second-degree murder and criminal weapons possession and was sentenced to five years’ probation.

Unlike the Hutson case, investigators in yesterday’s killing said that, to their knowledge, Mrs. Lee had never sought help for her daughter and seemed more frustrated than afraid.

Newsletter Sign Up

Thank you for subscribing.

An error has occurred. Please try again later.

You are already subscribed to this email.

  • See Sample
  • Manage Email Preferences
  • Not you?
  • Privacy Policy
  • Opt out or contact us anytime

«In the Queens case, the mom was more in fear for her life,» Detective Frain said. «In this incident, it appears the mother got fed up with her daughter who at the age of 42 was using crack. Fed up and frustrated, the mother took matters into her own hands to stop her daughter from using crack forever. It’s tragic.»

The shooting occurred about 11 P.M., after the mother pleaded with her daughter to break her crack habit, Detective Frain said. At some point, Mrs. Lee left the living room, where they were arguing, returned with a revolver and shot her daughter, he said.

A neighbor called the police after hearing the shot, Sergeant McCluskey said. Officers found Mrs. Lee several blocks away a short time later, the police said. The gun has not been recovered.

«I talked to Mrs. Lee about 5 P.M. on Tuesday,» said a neighbor, John 37, who declined to give his last name. «She seemed agitated about her daughter’s frame of mind, and there was some sort of disagreement with her over money. But she never went into details. I’m shocked.» Addiction Disputed

One neighbor disputed the mother’s claim that Ms. Swan was a crack addict. Connie Starks, 44, who lives in the six-story beige brick building, said that Ms. Swan came to live with her about a week ago after she argued with her mother.

«Nobody has seen that girl doing crack,» said Mrs. Starks, who has known the family for 15 years. «She was a quiet girl who minded her own business. All she did was read books and magazines.»

But, she said, «There was tension in that apartment. Avis was scared of Mrs. Jean in that she gave her respect. I don’t want Tiffany thinking her mother was killed stealing money for crack. It’s just not like that.»

Two years ago, South Bronx 2000, a community-based development organization, conducted a study of 1055 University Avenue that concluded that the building represented how drug dealing had taken a harsh toll on residents. The building’s management agent said that drug dealers dodged him by hiding in other apartments when he tried to evict them. He said dealers would give legal tenants up to $3,000 in bribes to illegally sublet their apartments. And he said many tenants were friendly with drug dealers, taking small loans from them and allowing them to hide from the police in their apartments.

Outside the building, a neighbor said, «I’ve known the family for 19 years.» The neighbor, Tony McKoi, 29, added, «Mrs. Jean is a nice lady and her daughter was too. All I know is that Mrs. Jean wouldn’t go and do something like that unless she was driven to it. It’s sad.»

We are continually improving the quality of our text archives. Please send feedback, error reports, and suggestions to archive_feedback@nytimes.com.

A version of this article appears in print on June 10, 1993, on Page B00003 of the National edition with the headline: Woman, 60, Charged With Killing Daughter Over Crack Use. Order Reprints | Today’s Paper | Subscribe


Статьи по теме

Сведения об авторе