Init encryption overview README

Author: spacesailor24

hacker-guides/encryption/README.md

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+# Encrypting and Decrypting Data with Lit
+
+Leveraging Lit's Multi-Party Computation (MPC) network, you can securely encrypt data using the network's public BLS (Boneh–Lynn–Shacham) key. The encryption process incorporates [Access Control Conditions (ACCs)](#access-control-conditions-accs) to specify who is authorized to decrypt the data. Only when a user meets these defined conditions will the Lit nodes generate their decryption shares, enabling the data to be decrypted securely and ensuring that access is granted exclusively to permitted parties.
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+## Table of Contents
+
+- [Prerequisites](#prerequisites)
+- [Relevant Terminology](#relevant-terminology)
+  - [Access Control Conditions (ACCs)](#access-control-conditions-accs)
+- [Next Steps](#next-steps)
+
+## Prerequisites
+
+- Understanding of Lit core terminology and concepts covered in the [Getting Started](../_getting-started/README.md#core-terminology) guide.
+- Understanding of the [Connecting to the Lit Network](../_getting-started/connecting-to-lit/README.md) guide.
+- Understanding of the [Authenticating a Session](../_getting-started/authenticating-a-session/README.md) guide.
+
+## Relevant Terminology
+
+This section extends the [Core Terminology](../_getting-started/README.md#core-terminology) to expand on the relevant terminology for encryption.
+
+### Access Control Conditions (ACCs)
+
+Rules that specify who can decrypt the encrypted data. ACCs can be based on blockchain conditions like wallet balances, token ownership, or custom smart contract logic.
+
+For more information on how to define and use ACCs, refer to the [Access Control Conditions](https://developer.litprotocol.com/category/advanced-topics) docs.
+
+## Next Steps
+
+Now that you have an overview of encrypting data with Lit, you can continue on to the encryption guides:
+
+- [Encrypting a String](./encrypt-string/README.md)