Recent questions tagged Hash

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hash - How do I generate a hashcode from a byte array in C#?

Say I have an object that stores a byte array and I want to be able to efficiently generate a hashcode for it ... the same contents to be equal. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Hashing passwords with MD5 or sha-256 C#

I'm writing a register form for a application but still having problems with being new to c#. I am looking ... in the variable "string hPassword;". Any ideas? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Is it possible to decrypt MD5 hashes?

Someone told me that he has seen software systems that: retrieve MD5 encrypted passwords from other systems; ... but is there an actual decryption algorithm? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - How does git compute file hashes?

The SHA1 hashes stored in the tree objects (as returned by git ls-tree) do not match the SHA1 hashes of ... it compress the content before computing the hash? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Python dictionary : TypeError: unhashable type: 'list'

I'm having troubles in populating a python dictionary starting from another dictionary. Let's assume that the " ... this line : aTargetDictionary[aKey] = [] Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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767 views

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hash - Time complexity of accessing a Python dict

I am writing a simple Python program. My program seems to suffer from linear access to dictionaries, its run- ... fun(*args) return memoized[key] return memo Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - yii CPasswordHelper: hashPassword and verifyPassword

I think I'm missing something critical here. In the CPasswordHelper::hashPassword function we have lines: $salt= ... guessing I didn't understand it completely. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Salting Your Password: Best Practices?

Closed. This question is opinion-based. It is not currently accepting answers. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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576 views

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hash - How does password salt help against a rainbow table attack?

I'm having some trouble understanding the purpose of a salt to a password. It's my understanding that the ... assuming a rainbow table existed for ALL hashes. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Is there an MD5 Fixed Point where md5(x) == x?

Is there a fixed point in the MD5 transformation, i.e. does there exist x such that md5(x) == x? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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703 views

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hash - Are there any SHA-256 javascript implementations that are generally considered trustworthy?

I am writing a login for a forum, and need to hash the password client side in javascript before sending ... reason why, probably they just like overkill. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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565 views

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hash - How to call a method stored in a HashMap? (Java)

This question already has answers here: Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Probability of SHA1 collisions

Given a set of 100 different strings of equal length, how can you quantify the probability that a SHA1 digest collision for the strings is unlikely... ? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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638 views

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hash - Is it safe to ignore the possibility of SHA collisions in practice?

Let's say we have a billion unique images, one megabyte each. We calculate the SHA-256 hash for the ... go ignoring this possibility, assuming it is zero? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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672 views

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hash - Are mutable hashmap keys a dangerous practice?

Is it bad practice to use mutable objects as Hashmap keys? What happens when you try to retrieve a value from ... Or is the behavior dependent on the language? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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477 views

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hash - C++ unordered_map using a custom class type as the key

I am trying to use a custom class as key for an unordered_map, like the following: #include <iostream> #include < ... do it. How can I accomplish this tasks? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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653 views

1 answer

hash - Is it possible to decrypt MD5 hashes?

Someone told me that he has seen software systems that: retrieve MD5 encrypted passwords from other systems; ... but is there an actual decryption algorithm? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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hash - Password length vs DOS attack

As I am referring to how password hashing works, there is an owasp blog says like "if a user can ... https://stackoverflow.com/questions/65852257/password-length-vs-dos-attack...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

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hash - java object to Sha-256

I'm trying to use Hash Function. I understand that I can digest string or bytes. But, what is the input ... :https://stackoverflow.com/questions/65877482/java-object-to-sha-256...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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722 views

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hash - Quality of murmur3f and xxhash different variations

From https://github.com/rurban/smhasher/, it seems that murmur3f and xxhash function (except xxh3) have ... /questions/65891888/quality-of-murmur3f-and-xxhash-different-variations...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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628 views

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hash - Encoding issues trying to convert hash_hmac

I am trying to convert the following code to ColdFusion. This is what I have tried so far but I ... .com/questions/65892201/encoding-issues-trying-to-convert-hash-hmac...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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742 views

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hash - In Git, what is the difference between long and short hashes?

Here is the long Git hash: commit c26cf8af130955c5c67cfea96f9532680b963628 Merge: 8654907 37c2a4f Author: nicolas Date: Wed ... what-is-the-difference-between-long-and-short-hashes...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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704 views

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hash - What pool of characters do MD5 and SHA have?

Does MD5 and SHA only contain alphanumeric characters? (i.e., from A to Z and 0 to 9, or do they exclude ... .com/questions/12618321/what-pool-of-characters-do-md5-and-sha-have...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

1 answer

hash - Best practice for hashing passwords - SHA256 or SHA512?

I am currently using SHA256 with a salt to hash my passwords. Is it better to continue using SHA256 or ... /questions/11624372/best-practice-for-hashing-passwords-sha256-or-sha512...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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610 views

1 answer

hash - What pool of characters do MD5 and SHA have?

Does MD5 and SHA only contain alphanumeric characters? (i.e., from A to Z and 0 to 9, or do they exclude ... .com/questions/12618321/what-pool-of-characters-do-md5-and-sha-have...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

640 views

1 answer

hash - Best practice for hashing passwords - SHA256 or SHA512?

I am currently using SHA256 with a salt to hash my passwords. Is it better to continue using SHA256 or ... /questions/11624372/best-practice-for-hashing-passwords-sha256-or-sha512...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

1 answer

hash - Uniform distribution of truncated md5?

Can we say that a truncated md5 hash is still uniformly distributed? To avoid misinterpretations: I'm ... /stackoverflow.com/questions/8184941/uniform-distribution-of-truncated-md5...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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654 views

1 answer

hash - Uniform distribution of truncated md5?

Can we say that a truncated md5 hash is still uniformly distributed? To avoid misinterpretations: I'm ... /stackoverflow.com/questions/8184941/uniform-distribution-of-truncated-md5...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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