Researchers have found a new way to attack the SHA-1 hashing algorithm, still used to sign almost one in three SSL certificates that secure major websites, making it more urgent than ever to ...

Older algorithms like MD5 and SHA1 have vulnerabilities that may or may not be a problem for you. If you need a secure hash, it is probably best to avoid them anyway.

The MD5 password hash algorithm is "no longer considered safe" by the original software developer, a day after the leak of more than 6.4 million hashed LinkedIn passwords.