readme crypto

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Mari Wahl 2015-01-07 14:31:16 -05:00
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# Cryptography
### Some Tips:
- Often data is just encoded in base64 or hex. Other times it's just compressed (gzip):
- Text 32 characters long --> md5 hash.
- 40 characters long --> SHA1 hash.
- equal signs spread --> base64 encoded string.
-text only letters, without numbers or special characters --> Caesar, Vigenere, or other type of cipher.
- hints about keys and signing --> likely RSA.
- Text 32 characters long --> md5 hash.
- 40 characters long --> SHA1 hash.
- equal signs spread --> base64 encoded string.
- text only letters, without numbers or special characters --> Caesar, Vigenere, or other type of cipher.
- hints about keys and signing --> likely RSA.
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### Scripts
* Command Line:
- Hash length extension attack
- Brute force hex digest chars
### Command Line
```
$ echo -n password | md5sum
5f4dcc3b5aa765d61d8327deb882cf99
```
- 32 chars
```
7e1321b3c8423b30c1cb077a2e3ac4f0a2a551a6458a8de22446cc76d639a9e98fc42c6cddf9966db3b09e843650343578b04d5e377d298e78455efc5ca404d5f4c9385f1902f7334b00b9b4ecd164de8bf8854bebe108183caeb845c7676ae48fc42c6ddf9966db3b09e84365034357327a6c4304ad5938eaf0efb6cc3e53dc7ff9ea9a069bd793691c422fb818
```
- Use Python's md5.md5().digest()
* Or you can use Python's md5.md5().digest()
- md5 hashes: [here](http://hash-killer.com/), [here](http://www.md5this.com/), [here](http://www.hashkiller.co.uk/).
- [md5sum](http://linux.about.com/library/cmd/blcmdl1_md5sum.htm)
- [md5 creator](http://www.md5-creator.com/)
### Scripts Available
- Hash length extension attack
- Brute force hex digest chars
------
## SHA