How to change hash checksum of a text file without changing the contents in the file
$begingroup$
I have created a text file called test.txt and the content of the file is Hello World
I would like to change the SHA checksum hash without modifying the contents and filename. Is there any way to do that without using any third party tool on the internet.
hash sha-256 sha-1
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
$endgroup$
add a comment |
$begingroup$
I have created a text file called test.txt and the content of the file is Hello World
I would like to change the SHA checksum hash without modifying the contents and filename. Is there any way to do that without using any third party tool on the internet.
hash sha-256 sha-1
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
$endgroup$
4
$begingroup$
What are you trying to do?
$endgroup$
– Alice Ryhl
Feb 4 at 20:49
add a comment |
$begingroup$
I have created a text file called test.txt and the content of the file is Hello World
I would like to change the SHA checksum hash without modifying the contents and filename. Is there any way to do that without using any third party tool on the internet.
hash sha-256 sha-1
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
$endgroup$
I have created a text file called test.txt and the content of the file is Hello World
I would like to change the SHA checksum hash without modifying the contents and filename. Is there any way to do that without using any third party tool on the internet.
hash sha-256 sha-1
hash sha-256 sha-1
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
asked Feb 4 at 19:20
CryptoFalconCryptoFalcon
21
21
4
$begingroup$
What are you trying to do?
$endgroup$
– Alice Ryhl
Feb 4 at 20:49
add a comment |
4
$begingroup$
What are you trying to do?
$endgroup$
– Alice Ryhl
Feb 4 at 20:49
4
4
$begingroup$
What are you trying to do?
$endgroup$
– Alice Ryhl
Feb 4 at 20:49
$begingroup$
What are you trying to do?
$endgroup$
– Alice Ryhl
Feb 4 at 20:49
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
Hash functions are deterministic, same input same output. Without a modification, you cannot change the result.
The hash of a file is used at least for the integrity check. If you were able to change it without modification the integrity check will have problems.
Note: as mentioned by Ella Rose in the comments if a keyed-hash message authentication code HMAC is used then changing the key will result in a different hash-based message authentication code.
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
$endgroup$
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Hash functions are deterministic, same input same output. Without a modification, you cannot change the result.
The hash of a file is used at least for the integrity check. If you were able to change it without modification the integrity check will have problems.
Note: as mentioned by Ella Rose in the comments if a keyed-hash message authentication code HMAC is used then changing the key will result in a different hash-based message authentication code.
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
$endgroup$
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
add a comment |
$begingroup$
Hash functions are deterministic, same input same output. Without a modification, you cannot change the result.
The hash of a file is used at least for the integrity check. If you were able to change it without modification the integrity check will have problems.
Note: as mentioned by Ella Rose in the comments if a keyed-hash message authentication code HMAC is used then changing the key will result in a different hash-based message authentication code.
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
$endgroup$
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
add a comment |
$begingroup$
Hash functions are deterministic, same input same output. Without a modification, you cannot change the result.
The hash of a file is used at least for the integrity check. If you were able to change it without modification the integrity check will have problems.
Note: as mentioned by Ella Rose in the comments if a keyed-hash message authentication code HMAC is used then changing the key will result in a different hash-based message authentication code.
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
$endgroup$
Hash functions are deterministic, same input same output. Without a modification, you cannot change the result.
The hash of a file is used at least for the integrity check. If you were able to change it without modification the integrity check will have problems.
Note: as mentioned by Ella Rose in the comments if a keyed-hash message authentication code HMAC is used then changing the key will result in a different hash-based message authentication code.
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
edited Feb 4 at 20:10
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
answered Feb 4 at 19:25
kelalakakelalaka
8,67022351
8,67022351
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
add a comment |
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
3
3
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
They might be able to use some kind of keyed hash function, depending on their use case. But that won't be SHA256 anymore either.
$endgroup$
– Ella Rose♦
Feb 4 at 20:03
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
$begingroup$
@EllaRose Yes, if it is a keyed function then changing the key will changed the result. Added, thanks.
$endgroup$
– kelalaka
Feb 4 at 20:10
add a comment |
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What are you trying to do?
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– Alice Ryhl
Feb 4 at 20:49