redo some of the crypto sections

README.md

@@ -6,7 +6,7 @@ CTFs, especially for beginners, can be very daunting and almost impossible to ap
 
 ##Quick Start
 
-1. First time? Read down below to learn more about CTFs, and then use the resources in the [topics](./topics/) directory to try to solve challenges on websites like [OverTheWire](https://overthewire.org/wargames/) and later on [ctftime](https://ctftime.org/).
+1. First time? Read down below to learn more about CTFs, and then use the resources in the [topics](./topics/) directory to try to solve challenges on websites like [OverTheWire](https://overthewire.org/wargames/) or [CanYouHack.it](https://canyouhack.it/) and later on [ctftime](https://ctftime.org/).
 
 2. Beginner? Use the guides found in the [topics](./topics/) directory to try to find out what type of challenges you are presented with and participate in some of the CTFs presented on [ctftime](https://ctftime.org/).
 

topics/cryptography/base64/README.md

@@ -0,0 +1,20 @@
+#Base64 Encoding
+
+Base64 encoding is a way to represent binary data as text.
+
+##Use
+
+* Encode:
+
+ * The [base64](https://linux.die.net/man/1/base64) command line program
+
+* Decode:
+
+ * Online [here](https://www.base64decode.org/)
+
+ * The [base64](https://linux.die.net/man/1/base64) command line program
+
+##More
+
+[Base64](https://en.wikipedia.org/wiki/Base64)
+

topics/cryptography/md5/README.md

@@ -1,19 +1,19 @@
 #MD5 Hashing
 
-> MD5 is a widely used cryptographic hash function producing a 128-bit (16-byte) hash value, typically expressed in text format as a 32 digit hexadecimal number - [Wikipedia](https://en.wikipedia.org/wiki/MD5). 
+MD5 is hashing function which creates a 16-byte hash value (usually represented as a 32 digit hexadecimal number) from any file.
 
-This system is commonly used to check the integrity of files (like downloads). The way MD5 hashes are created, any slight variation in a file creates a new hash that is completely different than the previous, making changes in files (e.g. corruption in download or tampering) very apparent.
+#Use
 
-Creating an MD5 hash is very simple, as there are multiple online tools like [md5-creator](https://www.md5-creator.com/) and even a command line tool [md5sum](https://linux.about.com/library/cmd/blcmdl1_md5sum.htm) which will quickly create a sum from input.
+* Create a hash:
 
-##Detecting
+ * Online [here](https://www.md5-creator.com/)
 
-MD5 hashes are very standard, as they are always 128 bits, or 32-character strings.
+ * The [md5sum](https://en.wikipedia.org/wiki/Md5sum) command line program
 
-##Solving
+* Crack a hash:
 
-*To-Do*
+ * Online [here](https://www.md5decrypter.co.uk/)
 
-##Sources/See More
+##More
 
-[Easy MD5 cracker](http:https://www.md5decrypter.co.uk/)
+[MD5](https:https://en.wikipedia.org/wiki/Md5)

topics/cryptography/sha1/README.md

@@ -0,0 +1,19 @@
+#SHA1 Hash
+
+SHA1 is a hash function which creates a 20-byte hash value (usually represented by a 40 digit hexadecimal number) from any file.
+
+##Use
+
+* Create a hash:
+
+ * Online [here](https://ratfactor.com/sha1)
+
+ * The [sha1sum](https://en.wikipedia.org/wiki/Sha1sum) command line program
+
+* Crack a hash:
+
+ * Online [here](https://www.stringfunction.com/sha1-decrypter.html)
+
+##More
+
+[SHA1](https://en.wikipedia.org/wiki/Sha1)