Free online password generator. How to write a password in Latin letters and numbers: php regular expressions Cyrillic The password must contain at least 8 characters

Mandatory requirements for a strong password

The password must not contain

• Personal information that is easy to find out. For example: first name, last name or date of birth.
• Obvious and simple words, phrases, expressions and character sets that are easy to pick up. For example: password, parol, abcd, qwerty or asdfg, 1234567.

Password generation methods

• Come up with an algorithm for creating passwords.
  For example, take your favorite poem or saying as a basis. Write it down in lowercase and uppercase Latin letters and replace some of them with similar numbers or symbols: I_p0Mn|O_4y9n0e Mg№vEn|E (I remember a wonderful moment).
• Use a password generator.
  With Kaspersky Password Manager, you can generate complex passwords, check their strength, and store them securely. You can also install the Kaspersky Password Manager extension in your browser to automatically fill in data entry fields on websites.

How often to change your password

Password protection

• Do not share or send your passwords to anyone.
• Do not leave passwords written on paper in an accessible place.
• Use a password manager or your browser's built-in password storage.
• Use different passwords for your accounts. If you use the same passwords and an attacker learns the password for one account, he can gain access to all the others.

The regular expression for the password must contain at least eight characters, at least one number and lower and upper case letters and special characters (15)

Use the following Regex to satisfy the following conditions:

Conditions: 1] Min 1 special character. 2] Min 1 number. 3] Min 8 characters or More

Regex: ^(?=.*\d)(?=.*[#$@!%&*?])(8,)$

Can test online: https://regex101.com

I want the regex to check that:

The password is at least eight characters long, including at least one number, and includes both lowercase and uppercase letters and special characters such as # ? , ! ,

It cannot be your old password or contain your username, "password" or "websitename"

And here is my test expression, which is for eight characters, including one uppercase letter, one lowercase letter, and one number or special character.

(?=^.(8,)$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*)(?=.* ).*$"

How can I write it for a password that must be eight characters including one capital letter, one special character and alphanumeric characters?

@ClasG already suggested:

^(?=\S*)(?=\S*)(?=\S*\d)(?=\S*[^\w\s])\S(8,)$

but it doesn't accept _ (underscore) as a special character (eg Aa12345_).

Improved:

^(?=\S*)(?=\S*)(?=\S*\d)(?=\S*([^\w\s]|[_]))\S(8,) $

In Java/Android, to check for a password with at least one number, one letter, one special character in the following pattern:

"^(?=.*)(?=.*\\d)(?=.*[$@$!%*#?&])(8,)$"

As per your need, this model should work fine. Try it,

^(?=(.*\d)(1))(.*\S)(?=.*)(8,)

Just create a string variable, assign a template and create a boolean method that returns true if the template is correct, false otherwise.

String pattern = "^(?=(.*\d)(1))(.*\S)(?=.*)(8,)"; String password_string = "Type the password here" private boolean isValidPassword(String password_string) ( return password_string.matches(Constants.passwordPattern); )

Import the jquery.validate.min.js JavaScript file.

You can use this method:

$.validator.addMethod("pwcheck", function (value) ( ​​return /[\@\#\$\%\^\&\*\(\)\_\+\!]/.test(value) && //.test(value) && //.test(value) && //.test(value) ));

1. At least one English letter in uppercase
2. At least one lowercase English letter
3. At least one digit
4. At least one special character

Hope the below works. I tried this in a custom Azure policy.

(? =. ) (? =. ) (? =. \d)(?=. [@ # $% ^ & * -_ + = {} | \: ",? / ~"();!])({}|\\:",?/ ~" (); ] |. (?! @)) {6,16} $

Not directly answering the question, but does it really need to be a regular expression?

I've used a lot of Perl and am used to solving problems with regular expressions. However, when they get more complex with all the looks and other quirks, you need to write dozens of unit tests to kill all those little bugs.

Additionally, a regular expression is usually several times slower than an imperative or functional solution.

For example, the following (not very FP) Scala function solves the original question about three times faster than the regex of the most popular answer. What it does is also so clear that you don't need a unit test:

Def validatePassword(password: String): Boolean = ( if (password.length< 8) return false var lower = false var upper = false var numbers = false var special = false password.foreach { c =>if (c.isDigit) numbers = true else if (c.isLower) lower = true else if (c.isUpper) upper = true else special = true ) lower && upper && numbers && special )

Try it:

^.*(?=.{8,})(?=.*)(?=.*)(?=.*[@#$%^&+=])*$

This regex works great for me.

Function myFunction() ( var str = "c1TTTTaTTT@"; var patt = new RegExp("^.*(?=.(8,))(?=.*)(?=.*)(?=.*[ @#$%^&+=])*$"); var res = patt.test(str); console.log("Is regular matches:", res); )

We can simply do this using HTML5.

Use below code in template attribute,

Pattern="(?=^.(8,)$)((?=.*\d)(?=.*\W+))(?![.\n])(?=.*)(?= .*).*$"

It will work great.

Regular expressions don't have an AND operator, so it's quite difficult to write a regular expression that matches valid passwords when the reality is defined by something AND something else AND something else...

But regular expressions have an OR operator, so just apply DeMorgan's theorem and write a regular expression that matches invalid passwords:

Anything with less than eight characters OR anything without numbers OR nothing but capitals OR OR nothing, no lowercase letters OR nothing but special characters.

^(.(0.7)|[^0-9]*|[^A-Z]*|[^a-z]*|*)$

If anything matches this, then it is an invalid password.

The solution I found in one of the previous answers:

Minimum 8 characters, at least 1 alphabet, 1 lowercase alphabet, 1 number and 1 special character: "^ (? =. ) (? =. ) (? =. \D)(?=. [ $ @ $!% ? &]) {8,} "

Doesn't work for me, but the following is a simplified version and works great (add any special character you like, I've added # here) and add the number rule the same way you did with letters:

"^(?=.*)(?=.*)(?=.*)(?=.*[$@$!%*?&]){8,}"

I would answer Peter Mortensen, but I don't have enough reputation.

His expressions are ideal for each of the specified minimum requirements. The problem with his expressions that don't require special characters is that they also don't have special characters and also provide maximum requirements, which I don't believe the OP is asking for. Typically you want your users to make their password as strong as they want; Why restrict strong passwords?

So, its "at least eight characters, at least one letter and one number":

^(?=.*)(?=.*\d)(8,)$

reaches the minimum requirement, but the remaining characters can be only letter and numbers. To allow (but not require) special characters, you should use something like:

^(?=.*)(?=.*\d).(8,)$ to allow any characters

^(?=.*)(?=.*\d)(8,)$ to allow special special characters

Likewise, "a minimum of eight characters, at least one uppercase letter, one lowercase letter, and one number:

^(?=.*)(?=.*)(?=.*\d)(8,)$

meets this minimum requirement, but allows only letters and numbers. Usage:

^(?=.*)(?=.*)(?=.*\d).(8,)$ to allow any characters

^(?=.*)(?=.*)(?=.*\d)(8,) to allow special special characters.

Use the following Regex to satisfy the below conditions: Conditions: 1] Min 1 uppercase letter. 2] Min 1 lowercase letter. 3] Min 1 special character. 4] Min 1 number. 5] Min 8 characters. 6] Max 30 characters. Regex: /^(?=.*)(?=.*)(?=.*\d)(?=.*[#$@!%&*?])(8.30)$/

Any person who uses the Internet has probably more than once encountered the need to come up with and set passwords: for logging into mail, for an account on a forum, for online banking. And in almost every registration form you are advised to come up with a strong password. After all, the confidentiality of your correspondence, the safety of your funds, and the security of your computer as a whole depend on how complex your secret word or phrase is. The question arises: how to come up with a complex password?

How to come up with a strong password

Length. The recommended minimum length for a strong password is 8 characters. It is believed that cracking passwords of 8 or more characters by guessing is a too long process and the chances of an attacker finding such a combination are too small.

Register. A good password should contain both lowercase and uppercase letters.

Special characters. An extremely secure password, along with letters and numbers, also contains special characters. For example #, ~,+, _

In total, the ideal option would be a combination of upper and lower case Latin letters, numbers and special characters with a total length of at least 8 characters. For example:

uE_xm932
9203Jb#1
29Rtaq!2

Which should never be used as a password

Never use: as a password or secret word:

• dates of birth
  The biggest stupidity is to set your own date of birth in the format 12071992 as a password for your VKontakte page, where the same date is indicated in the information :)
• phone numbers
  A password consisting of your phone number will not be cracked only by the lazy. And here it doesn’t matter how many numbers there are :)
• names, surnames, animal names
  It's funny when people consider a mother's maiden name to be a magically reliable protection. ...which the whole yard has known for 50 years :)
• and of course, all sorts of nonsense like “qwerty123”, “password”, “password”, “********”, “123”, “12345678”, “fyva”, “asdf”, etc. By the way, the leader among secretaries’ passwords is “one”, i.e. one single digit “1” :)

Conclusion

In conclusion, I want to say - do not neglect your safety. Do not use the same secret words for authorization on different sites and services, no matter how complex and reliable they may be. If you have one password for everything, everywhere, then by hacking one site, attackers can gain access to all your online accounts, which means they can see information on yours, use saved credentials in the browser and other information. And remember: there is nothing more permanent than temporary. Therefore, do not be lazy to come up with strong combinations and set complex passwords straightaway- don’t put this off for later. Let your information be available only to you! Good luck!

Here you can generate free ( create) password of any length and level of complexity for your applications, accounts, social. networks, Windows passwords, encrypted archives, etc.

What is a password?

Password is a secret character set that protects your account.

This is something like a PIN code for a plastic card or a key to an apartment or car. It must consist only of Latin letters and/or numbers. No punctuation or spaces. Letter case matters too. That is, if a password is assigned that contains a large (capital) letter, but when typing it the user types a small one, then this will be an error - he will not be allowed into the account.

The password must be complex! Ideally, it should consist of at least ten characters, including numbers, large and small letters. And there are no sequences - everything is scattered. Example: Yn8kPi5bN7

The simpler the password, the easier it is to crack it. And if this happens, the hacker will gain access to the account. Moreover, you most likely won’t even know about it. But a person will be able, for example, to read your personal correspondence or even participate in it.

One of the most common passwords that users specify when registering is their year of birth. Finding such a “key” is not at all difficult. It is also very common to use a set of numbers or letters on the keyboard, arranged in order ( type 123456789 or qwerty).

How to come up with a complex password?

Mandatory requirements for a strong password

• The password must contain at least 8 characters.
• The password must contain uppercase and lowercase letters, numbers, spaces and special characters.
  For example: oNQZnz$Hx2 .

The password must not contain

• Personal information that is easy to find out. For example: first name, last name or date of birth.
• Obvious and simple words, phrases, expressions and character sets that are easy to pick up. For example: password, password, abcd, qwerty or asdfg, 1234567 .

There are several effective ways to come up with a strong password:

• Mixing. We type the Cyrillic word in the Latin case, insert after each letter the numbers that are significant for you (house number, apartment number) or transform some letters into numbers (instead of the letter B we put the number 6, instead of I - 9I, etc.)
• We type a word or phrase with spaces in the wrong places. For example, “my role.”
• Enter the phrase by alternately pressing the Shift key. For example, VoT-VedZ@sAdA
• We choose two words - an adjective (free) and a verb (run). Add a significant year, for example 1980, and any symbol. We get: Free19%Run80!
• We come up with a password with spelling errors and supply it with symbols and numbers: CoCoy#&_Password.
• We remember Russian folklore or poetry and encrypt the message. For example, take the proverb “Patience and work will grind everything down.” Let's write every first letter of every word in English in lower case, and every second letter in upper case. Let's put punctuation marks between words. We get: tE!i?tR?vS!pT.

A little difficult? But the password you come up with this way will be secure.

Password protection

• Do not share or send your passwords to anyone.
• Do not leave passwords written on paper in an accessible place.
• Use a password manager or your browser's built-in password storage.
• Use different passwords for your accounts. If you use the same passwords and an attacker learns the password for one account, he can gain access to all the others.

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To perform calculations, you must enable ActiveX controls!

I need a regular expression to test this:

The password contains at least eight characters, including at least one number, and includes both lowercase and uppercase letters and special characters such as # , ? , ! .

This cannot be your old password or contain your username, "password" or "websitename"

Here's my validation expression, which is for eight characters, including one uppercase letter, one lowercase letter, and one number or special character.

(?=^.(8,)$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*)(?=.* ).*$"

How can I write it for the password to be eight characters including one capital letter, one special character and alphanumeric characters?

javascript asp.net regex

24 Replies

877

Minimum eight characters, at least one letter and one number:

"^(?=.*)(?=.*\d)(8,)$"

A minimum of eight characters, at least one letter, one number and one special character:

"^(?=.*)(?=.*\d)(?=.*[@$!%*#?&])(8,)$"

A minimum of eight characters, at least one uppercase letter, one lowercase letter and one number:

"^(?=.*)(?=.*)(?=.*\d)(8,)$"

A minimum of eight characters, at least one uppercase letter, one lowercase letter, one number and one special character:

"^(?=.*)(?=.*)(?=.*\d)(?=.*[@$!%*?&])(8,)$"

A minimum of eight and a maximum of 10 characters, with at least one uppercase letter, one lowercase letter, one number and one special character:

"^(?=.*)(?=.*)(?=.*\d)(?=.*[@$!%*?&])(8,10)$"

53

Regular expressions don't have an AND operator, so it's quite difficult to write a regex that matches valid passwords when the reality is defined by something AND, something else AND, something else...

But regular expressions have an OR operator, so just apply DeMorgan's theorem and write a regex that matches invalid passwords:

Anything less than eight characters OR anything that doesn't contain numbers OR anything that does not contain capital letters OR or anything that doesn't contain lowercase letters OR anything that does not contain special characters.

^(.(0.7)|[^0-9]*|[^A-Z]*|[^a-z]*|*)$

If anything matches this, then it is an invalid password.

29

Just a slight improvement to @anubhava"s answer: since special characters are limited to those on the keyboard, use this for any special character:

^(?=.*?)(?=(.*)(1,))(?=(.*[\d])(1,))(?=(.*[\W])(1, ))(?!.*\s).(8,)$

This regex will enforce these rules:

• At least one capital English letter
• At least one lowercase English letter
• At least one number
• At least one special character
• Minimum eight in length

20

I had some difficulty following the most popular answer for my circumstances. For example, my check failed with characters like; or [ . I wasn't interested in whitelisting my special characters, so I instead used [^\w\s] as a test - simply put - matching non-word characters (including numeric ones) and non-space characters. To sum it up, here's what worked for me...

• at least 8 characters
• at least 1 numeric character
• at least 1 lowercase letter
• at least 1 capital letter
• at least 1 special character

/^(?=.*?)(?=.*?)(?=.*?)(?=.*?[^\w\s]).(8,)$/ ^(?=\S *)(?=\S*)(?=\S*\d)(?=\S*[^\w\s])\S(8,)$

but it doesn't accept _(underscore) as a special character (eg Aa12345_).

Improved one:

^(?=\S*)(?=\S*)(?=\S*\d)(?=\S*([^\w\s]|[_]))\S(8,) $

2

I found a lot of problems here, so I made my own.

Here it is in all its glory, with tests:

^(?=.*)(?=.*)(?=.*\d)(?=.*([^a-zA-Z\d\s])).(9,)$

Something to pay attention to:

1. doesn't use \w because it includes _ which I'm testing.
2. I was having a lot of trouble matching characters without matching the end of the string.
3. Doesn't specify characters specifically, this is also because different locales may have different characters on their keyboards that they may want to use.

1

We can simply do this using HTML5.

Use the below code in the pattern attribute,

Pattern="(?=^.(8,)$)((?=.*\d)(?=.*\W+))(?![.\n])(?=.*)(?= .*).*$"

It will work perfectly.

1

You can use the below regular expression pattern to check the password whether it matches your expectations or not.

((?=.*\\d)(?=.*)(?=.*)(?=.*[~!@#$%^&*()]).(8,20))

1

Use the following Regex to satisfy the following conditions:

Conditions: 1] Min 1 special character. 2] Min 1 number. 3] Min 8 characters or More

Regex: ^(?=.*\d)(?=.*[#$@!%&*?])(8,)$

0

In Java/Android, check the password with at least one number, one letter, one special character according to the following scheme:

"^(?=.*)(?=.*\\d)(?=.*[$@$!%*#?&])(8,)$"

0

Try this:

^.*(?=.{8,})(?=.*)(?=.*)(?=.*[@#$%^&+=])*$

This regex works perfect for me.

Function myFunction() ( var str = "c1TTTTaTTT@"; var patt = new RegExp("^.*(?=.(8,))(?=.*)(?=.*)(?=.*[ @#$%^&+=])*$"); var res = patt.test(str); console.log("Is regular matches:", res); )

0

Hope the below works. I tried this in a custom Azure policy.

^(?=. ) (?=. ) (?=. \d)(?=. [@#$%^&*-_+={}|\:",?/ ~"();!])({}|\\:",?/ ~"();!]|.(?!@)){6,16}$

-1

The solution I found in one of the previous answers is like:

Minimum 8 characters minimum 1 uppercase alphabet, 1 lowercase alphabet, 1 number and 1 special character: "^(?=. ) (?=. ) (?=. \d)(?=. [$@$!% ?&]){8 ,}" ..

.

this didn't work for me, but the following is a simplified version and works great (add any special character you like, I added # here) and also add a number rule like you do with letters like:

"^(?=.*)(?=.*)(?=.*)(?=.*[$@$!%*?&]){8,}"

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