cryptographic-hash-function

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Why is it not possible to reverse a cryptographic hash?

Why can\'t you just reverse the algorithm like you could reverse a math function? How is it possible to make an algorithm that isn\'t reversible?[详细]

2023-03-18 01:15 分类：问答
Using a "slow" hash function with fewer iterations vs. a "fast" one with more?

Any benefit to using a slower hash function 开发者_C百科with fewer iterations vs. a fast one with more?Assuming you are attempting to protect a password..You want something that\'s a better hash. And[详细]

2023-03-15 13:31 分类：问答
MD5 is 128 bits but why is it 32 characters?

I read some docs about md5, it said that its 128 bits, but why is it 32 characters? I can\'t compute the characters.[详细]

2023-03-12 19:40 分类：问答
How to hash some String with SHA-256 in Java?

How can I hash some String with S开发者_如何学编程HA-256 in Java?SHA-256 isn\'t an "encoding" - it\'s a one-way hash.[详细]

2023-02-21 14:53 分类：问答
Difference in SHA1 in .NET and MySQL

I have a couple different bits of code but the short story is I insert some passwords into a MySQL database using SHA1 and also compute SHA1 hashes into .NET and t开发者_开发技巧hey are not matching.[详细]

2023-01-19 13:52 分类：问答
Client-side hashing/salting over HTTPS

I\'m wondering what the serious issues are with the following setup: Username/password login scheme Javascript/ajax requests the salt value from the server (we have established in previous questions[详细]

2023-01-16 16:07 分类：问答
HMAC security - Is the security of the HMAC based on SHA-1 affected by the collisions attacks on SHA-1?

Is the security of the HMAC based on S开发者_开发问答HA-1 affected by the collisions attacks on SHA-1?The security implications of HMAC are described in detail in the security section of the RFC. In a[详细]

2023-01-08 16:33 分类：问答
How can I hash a password in Java?

I need to hash passwords for storage in a database. How can I do this in Java? I was hoping to take the plain text password, add a random salt, then store the salt and the hashed password in the data[详细]

2022-12-31 10:51 分类：问答
C++ - A Very simple HTTP server: WSA unreferenced error

I\'m learning C++, i wanted to try implementing a very simple HTTP server that will just output a text message. I use Microsoft Visual Studio 2005.[详细]

2022-12-30 02:03 分类：问答
Converting a md5 hash byte array to a string

How can I convert the hashed result, which is a byte array, to a string? byte[] bytePassword = Encoding.UTF8.GetBytes(password);[详细]

2022-12-23 05:49 分类：问答