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* PUSH NOTE : 9. Public Key Encryption.md

* PUSH NOTE : 3. Symmetric Key Encryption.md

* PUSH ATTACHMENT : is-03-ecb-encryption.png

* PUSH ATTACHMENT : is-03-cbc-encryption.png

* PUSH ATTACHMENT : is-03-ctr-encryption.png

* PUSH NOTE : 07. Public Key Cryptography.md

* PUSH NOTE : 7. Key Exchange.md

* PUSH NOTE : 03. Symmetric Key Cryptography (2).md

* PUSH NOTE : 5. CCA-Security and Authenticated Encryption.md

* PUSH NOTE : 6. Hash Functions.md

* DELETE FILE : _posts/lecture-notes/internet-security/2023-10-03-key-exchange.md

* DELETE FILE : _posts/lecture-notes/modern-cryptography/2023-09-18-symmetric-key-cryptography-2.md

* DELETE FILE : assets/img/posts/lecture-notes/modern-cryptography/is-03-cbc-encryption.png

* DELETE FILE : assets/img/posts/lecture-notes/modern-cryptography/is-03-ctr-encryption.png

* DELETE FILE : assets/img/posts/lecture-notes/modern-cryptography/is-03-ecb-encryption.png
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Sungchan Yi
2024-11-13 10:54:01 +09:00
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_posts/lecture-notes/modern-cryptography/2023-09-19-symmetric-key-encryption.md
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@@ -128,11 +128,11 @@ We learned how to encrypt a single block. How do we encrypt longer messages with
There are many ways of processing multiple blocks, this is called the **mode of operation**.
Additional explanation available in [Modes of Operations (Internet Security)](../../internet-security/2023-09-18-symmetric-key-cryptography-2/#modes-of-operations).
Additional explanation available in [Modes of Operations (Internet Security)](../internet-security/2023-09-18-symmetric-key-cryptography-2.md#modes-of-operations).
### Electronic Codebook Mode (ECB)
![is-03-ecb-encryption.png](../../../assets/img/posts/lecture-notes/internet-security/is-03-ecb-encryption.png)
![is-03-ecb-encryption.png](../../../assets/img/posts/lecture-notes/modern-cryptography/is-03-ecb-encryption.png)
- ECB mode encrypts each block with the same key.
- Blocks are independent of each other.
@@ -140,7 +140,7 @@ Additional explanation available in [Modes of Operations (Internet Security)](..
### Ciphertext Block Chain Mode (CBC)
![is-03-cbc-encryption.png](../../../assets/img/posts/lecture-notes/internet-security/is-03-cbc-encryption.png)
![is-03-cbc-encryption.png](../../../assets/img/posts/lecture-notes/modern-cryptography/is-03-cbc-encryption.png)
Let $X = \left\lbrace 0, 1 \right\rbrace^n$ and $E : \mathcal{K} \times X \rightarrow X$ be a **PRP**.
@@ -191,7 +191,7 @@ Note that if $k_1$ is the same as the key used for encrypting messages, then thi
### Counter Mode (CTR)
![is-03-ctr-encryption.png](../../../assets/img/posts/lecture-notes/internet-security/is-03-ctr-encryption.png)
![is-03-ctr-encryption.png](../../../assets/img/posts/lecture-notes/modern-cryptography/is-03-ctr-encryption.png)
Let $F : \mathcal{K} \times X \rightarrow X$ be a secure **PRF**.