# Cryptography and Blockchain fundamentals

In this first module we will go through a recap of all the basics of cryptography and blockchain needed for understanding how Aleo works and how to build applications on the chain. 

After understanding the basic cryptography primitives, we'll dive in depth in existing blockchain protocols, their data model and how privacy can be introduced without compromising accountability.

{% content-ref url="cryptography-and-blockchain-fundamentals/0.1-hash-functions" %}
[0.1-hash-functions](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.1-hash-functions)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.2-symmetric-vs-asymmetric-encryption" %}
[0.2-symmetric-vs-asymmetric-encryption](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.2-symmetric-vs-asymmetric-encryption)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.3-elliptic-curve-cryptography" %}
[0.3-elliptic-curve-cryptography](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.3-elliptic-curve-cryptography)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.4-cryptographic-signatures" %}
[0.4-cryptographic-signatures](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.4-cryptographic-signatures)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.5-blockchain-bitcoin" %}
[0.5-blockchain-bitcoin](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.5-blockchain-bitcoin)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.6-utxo-based-model" %}
[0.6-utxo-based-model](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.6-utxo-based-model)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.7-programmability-ethereum" %}
[0.7-programmability-ethereum](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.7-programmability-ethereum)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.8-account-based-model" %}
[0.8-account-based-model](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.8-account-based-model)
{% endcontent-ref %}

{% content-ref url="cryptography-and-blockchain-fundamentals/0.9-zkp-and-zksnark" %}
[0.9-zkp-and-zksnark](https://zlearn.gitbook.io/zlearn/cryptography-and-blockchain-fundamentals/0.9-zkp-and-zksnark)
{% endcontent-ref %}