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spelling mistakes and typos #34

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4 changes: 2 additions & 2 deletions cryptographic-hash-functions/hash-functions-applications.md
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Expand Up @@ -20,7 +20,7 @@ The above example comes from the `/etc/shadow` file in a modern Linux system. Th

## Generate Unique ID

Generate an \(**almost**\) **unique ID** of certain document / message. Cryptographic hash functions almost uniquely identify documents based on their content. In theory **collisions are possible** with any cryptographic hash function, but are very unlikely to happen, so most systems \(like **Git**\) assume that the hash function they use is **collistion free**.
Generate an \(**almost**\) **unique ID** of certain document / message. Cryptographic hash functions almost uniquely identify documents based on their content. In theory **collisions are possible** with any cryptographic hash function, but are very unlikely to happen, so most systems \(like **Git**\) assume that the hash function they use is **collision free**.

Usually a document is **hashed** and the **document ID** \(hash value\) is used later to prove the existence of the document, or to retrieve the document from a storage system. Example of hash-based unique IDs are the commit hashes in **Git** and **GitHub**, based on the content of the commit \(e.g. `3c3be25bc1757ca99aba55d4157596a8ea217698`\) and the **Bitcoin** addresses \(e.g. `1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2`\).

Expand All @@ -38,5 +38,5 @@ In the above example the SHA-1 unique ID identifies a certain commit in GitHub.

## Cryptographic Hashes are Part of Modern Programming

**Cryptographic hash functions** are so widely used, that they are often implemented as **build-in functions** in the standard libraries for the modern programming languages and platforms.
**Cryptographic hash functions** are so widely used, that they are often implemented as **built-in functions** in the standard libraries for the modern programming languages and platforms.