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php Programming Glossary: rainbowHow to encrypt/decrypt data in php? http://stackoverflow.com/questions/10916284/how-to-encrypt-decrypt-data-in-php with known passwords and their respective hash outputs the rainbow tables. Adding a salt to the password before hashing it would.. a salt to the password before hashing it would render a rainbow table useless but recent hardware advancements made brute force..
Secure login with proper authentication in PHP http://stackoverflow.com/questions/1363833/secure-login-with-proper-authentication-in-php it with the original. This data structure is called a rainbow table. Then if any of the dictionary word hashes match a password.. timestamp or some such. Then an attacker cannot use a rainbow table because every password is essentially hashed slightly.. slightly differently he would have to create a separate rainbow table for every single distinct salt practically for each account..
Historical security flaws of popular PHP CMS's? http://stackoverflow.com/questions/2951917/historical-security-flaws-of-popular-php-cmss first idea is to hash them. Which is a bad idea because of rainbow tables even if the hash is not md5 but sha512 for example ...
Suggestions for (semi) securing high-scores in Flash/PHP game http://stackoverflow.com/questions/303255/suggestions-for-semi-securing-high-scores-in-flash-php-game 64 characters MD5 as a hash becomes ineffective due to rainbow table attacks and as the value you're sending will be shared..
Many hash iterations: append salt every time? http://stackoverflow.com/questions/3559437/many-hash-iterations-append-salt-every-time significantly increase the time it will take to generate a rainbow table... Yes it does expose a DOS vulnerability but it also..
Password security: sha1, sha256 or sha512 http://stackoverflow.com/questions/3897434/password-security-sha1-sha256-or-sha512 not an issue. You want to salt hashes as someone may use rainbow tables to look them up. As you know hash values will always..
http://stackoverflow.com/questions/4983915/is-time-a-good-salt the difficulty cost of precomputated attacks including rainbow tables Salting makes sure that the same password does not result.. bit value would take up just under 200 exabytes without rainbow reduction . There is no need for the salt to be secret. A salt.. per Unix system but there are many roots in the world. A rainbow table for root would be worth the effort since it could be applied..
md5 hashing using password as salt? http://stackoverflow.com/questions/5482437/md5-hashing-using-password-as-salt have used weak passwords then their hashes will appear in rainbow tables. For example if a user has the password password then.. . If I look up that hash in a rainbow table like the one at gromweb.com it spits out password . Use.. to every password before calculating a hash. Now the rainbow table is far less likely to work because it probably won't have..
How can we create a fairly secure password hash in PHP? http://stackoverflow.com/questions/6340105/how-can-we-create-a-fairly-secure-password-hash-in-php is so fast that there is little to no cost for generating rainbow tables your security is still compromised. A few pointers Do.. increases the time required for the attacker to compute a rainbow table. Example function strong_hash input salt null algo 'sha512'..
Improve password hashing with a random salt http://stackoverflow.com/questions/9420722/improve-password-hashing-with-a-random-salt defending against brute force attacks using pre computed rainbow tables . Salt makes brute force much more expensive in time.. you much but it makes a brute force attack calculating rainbow tables even more expensive... please don't invent yourself there.. days mandatrory since CPU time usable for attacks like rainbow tables brute force etc. is getting more and more widely available..
http://stackoverflow.com/questions/10329999/php-encrypting-passwords methods than bcrypt and scrypt bcrypt FAQ Enough With The Rainbow Tables What You Need To Know About Secure Password Schemes How..
Best practices: safest method to store passwords in a table? [closed] http://stackoverflow.com/questions/1592608/best-practices-safest-method-to-store-passwords-in-a-table plain text passwords and the not so obvious attack using Rainbow tables . Keep in mind that if you store passwords in this way..
http://stackoverflow.com/questions/4983915/is-time-a-good-salt Cryptography book Matasano Security Enough with the Rainbow Tables usenix.org Unix crypt used salt since 1976 owasp.org..
is there a way to reverse a hash without rainbow tables? [duplicate] http://stackoverflow.com/questions/7523625/is-there-a-way-to-reverse-a-hash-without-rainbow-tables nowadays. At this point i tought it was only possible with Rainbow Tables. Was i wrong In case Rainbow Tables is the only way to.. was only possible with Rainbow Tables. Was i wrong In case Rainbow Tables is the only way to go how someone could reverse a hash.. questions At this point i tought it was only possible with Rainbow Tables. Was i wrong Technically yes you are wrong. No hash function..
openssl_digest vs hash vs hash_hmac? Difference between SALT & HMAC? http://stackoverflow.com/questions/8952807/openssl-digest-vs-hash-vs-hash-hmac-difference-between-salt-hmac Short Answer Neither Long Answer As it turns out The Rainbow Table Is Dead . Just using hash password . salt or even hash_hmac..
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