md5 online hash generator

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Online Md5 Generator

About Online Md5 Generator

Crack passwords with ease using the new md5 online hash generator

What is MD5?

MD5 is a message-digest algorithm for computing a cryptographic hash value. So what is a hash function then? Simply put, a hash function takes a block of data and returns a fixed-size bit string (hash value). The data used by hash functions is called a message, while the computed hash value is called the digest.

When to use MD5?

MD5, like other hash functions, is employed in digital signatures, message authentication codes, index data in hash tables, for finger-printing, to detect duplicate data, distinguish files, perfectly identify files, and as checksums to detect data corruption.

How big is an MD5 hash value?

MD5 uses a 128-bit (16-byte) hash value. It's normally constituted as a hexadecimal number of 32 digits.

How can I decrypt MD5?

You just can't! MD5 is not an encryption algorithm. A lot of people believe that MD5 encrypts data. All it does is compute a hash value for a given dataset.

How do I reverse MD5?

You can't! MD5 can not be reversed. Hash functions are used only as one-way operations. Their function is to transform the data (messages) into a digest (hash value). It is not reversible. To better explain why an MD5 is NOT reversible, here's a very simple example:

In MD5 text data consisting of 750,000 characters, we obtained just 32 digits of the digest. Now if I wanted to revert this, how could I possibly determine with certainty that  750,000 characters were used from only 32 digits?!? This would be the superlative compression algorithm in the world.

What about possible collisions?

Most collisions are attributed to hashing about 6 billion files per second for 100 years. Read about the Birthday Paradox for more information.

What are rainbow tables and why should I care?

Reverse-hash lookup tables that are known as rainbow tables can be used to describe md5( ) hashes. Because md5( ) generates the same hash value for a given string of characters, it's fairly intuitive to perform brute force lookups. For example, one may precompute the digest of all eight character alpha-numeric combinations, and then they may scan a password table to locate what password corresponds to which digest. This is one of the reasons why you should use salt to compute your password digest.

People say md5 is not secure, is that true?

md5 is known to be collision-resistant, but it's used differently depending on the circumstance.

MD4 is a great option if you want a simple checksum algorithm or want a different constraint on a table. It's surprisingly compact (no greater than 32 characters), therefore inexpensive for storage, and is also extremely fast to compute. Just avoid using MD4 for password digests or other high-security systems. You'll find several online security guidelines to help you along the way. If you are unsure about using md5, you can try SHA-256 instead.