Timeline for Difference between SHA1 and SHA1HMAC? [duplicate]
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Nov 8, 2015 at 8:05 | comment | added | CodesInChaos |
SHA1 only has one parameter, the data. HMAC-SHA-1 has two parameters, key and data. Simply concatenating key and data and passing them to SHA-1 is not a good idea. SHA1(Data + Key) is much weaker than HMAC-SHA-1, since it relies on collision resistance. SHA1(Key + Data) is totally broken, due to length extensions.
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| Nov 8, 2015 at 5:43 | comment | added | Imran Qadir Baksh - Baloch | @CodesInChaos you mean SHA1(Data) and SHA1(Data + Key)? Can you please explain? | |
| Nov 7, 2015 at 19:26 | history | closed |
otus DrLecter fgrieu♦ Gilles 'SO- stop being evil' CodesInChaos |
Duplicate of What is the difference between a HMAC and a hash of data? | |
| Nov 7, 2015 at 19:26 | comment | added | CodesInChaos | HMAC takes a key, plain SHA-1 does not. | |
| Nov 7, 2015 at 18:49 | review | Close votes | |||
| S Nov 7, 2015 at 19:30 | |||||
| Nov 7, 2015 at 18:39 | review | Low quality posts | |||
| S Nov 7, 2015 at 19:30 | |||||
| Nov 7, 2015 at 18:29 | review | First posts | |||
| Nov 7, 2015 at 18:34 | |||||
| Nov 7, 2015 at 18:22 | history | asked | Imran Qadir Baksh - Baloch | CC BY-SA 3.0 |