a cryptographic hash function with a 128-bit (16-byte) output, now deprecated

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10
votes
6answers
6k views

Is MD5 considered insecure?

After all these articles circulating online about md5 exploits, I am considering switching to another hash algorithm. As far as I know it's always been the algorithm of choice among numerous DBAs. Is ...
-5
votes
5answers
713 views

create a variants of MD5

I have also asked similar q here : To create a variants of MD5, I made following changes : MD5 uses a non-linear sin(i)* pow(2,32) ----> i plane to use cos(i)*pow(2,32) Instead ...
24
votes
3answers
3k views

MD5 collision attacks: are they relevant in password hashing?

DISCLAIMER: This is not an endorsement of MD5 as a password hashing function. I know about parallelization, GPUs, and dedicated password hashing functions like bcrypt and scrypt. With that out of ...
27
votes
3answers
45k views

Is SHA1 better than md5 only because it generates a hash of 160 bits?

It is well known that SHA1 is recommended more than md5 for hashing since md5 is practically broken as lot of collisions have been found. With the birthday attack, it is possible to get a collision ...
2
votes
2answers
870 views

How weak is MD5 as a password hashing function ?

A professor told us today, that MD5 is weak. I understand his chain of thought but pointed out, that IMHO MD5 is a good way to go if you would use a long (even really long) dynamic salts and static ...
3
votes
2answers
427 views

Does PCI ban using MD5 to store sensitive data?

Just had a vendor tell me that because their PCI auditors did not recommend banning the use of unsalted MD5 to store sensitive data at this time with with their current level of PCI compliance that ...
1
vote
4answers
1k views

Shall I need to use MD5 algorithm in both JavaScript and PHP for login authentication?

I have a login form with username and password. I post this form data to a PHP file. For security reasons I want to encrypt my password in the database and network. Now I have done now following ...
-2
votes
0answers
116 views

Varient of MD5 and SHA [duplicate]

Possible Duplicate: Generating random numbers with repeated hashing, but without using a standard hash function I need a new mechanism to create Random Number Generate(RNG). In which ...