Symmetric Encryption

Symmetric Encryption

José Cruz José Cruz

José Cruz

Experienced Software Architect in Java, .NET, and Python, and a Passion for Crafting Scalable, High-Quality Solutions.

发布日期: 2023年7月10日
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Symmetric Encryption


is a method of encrypting and decrypting data using the same secret key.


- AKA: secret-key, single-key, or private-key encryption.??

- The secret key is shared between both parties. (increases the risk)??

- The same key is used to encrypt and decrypt the message.??

- It can use block or stream ciphers.??

- Pros: good for volumes of data, files, databases, and networks. Fast.??

- Pros: confidentiality, integrity, and authentication??

- Cons: How do I share the key? How do I scale for multiple users? (multiple keys)??

- Cons: Doesn't support non-repudiation.??

- Examples: Blowfish, RC4, DES, Triple DES (3DES), and AES (most popular).??

- Examples: ChaCha20 (used by TLS 1.3, for instance)

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