5.4 Asymmetric Cryptography（非对称加密）

LO 3 · EK 12 ｜ 严格按大纲顺序学习

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学习目标 Learning Objectives

5.4.A Determine the appropriate asymmetric key to use when sending or receiving encrypted data.

- [5.4.A.1](/ek/5.4.A.1) — Asymmetric encryption allows users to communicate securely without prearranging a shared secret … - [5.4.A.2](/ek/5.4.A.2) — When using asymmetric encryption, each entity that will be receiving data must first generate a … - [5.4.A.3](/ek/5.4.A.3) — Once the receiver generates the key pair, the private key must be stored securely. If the privat… - [5.4.A.4](/ek/5.4.A.4) — To send information securely to someone, the sender will use the receiver’s public key to encryp…

5.4.B Explain why the length of a key impacts the security of encrypted data.

- [5.4.B.1](/ek/5.4.B.1) — Longer keys result in larger keyspaces. For binary keys, an n-bit length key has a keyspace of 2… - [5.4.B.2](/ek/5.4.B.2) — Using an application to randomly guess an n-bit length encryption key means that on average an a… - [5.4.B.3](/ek/5.4.B.3) — Although longer keys are more secure, they also require more time to encrypt and decrypt message… - [5.4.B.4](/ek/5.4.B.4) — Computational processing power and efficiency continue to improve, allowing software to guess ke… - [5.4.B.5](/ek/5.4.B.5) — Key-length comparison is only valid when comparing keys for the same cryptographic algorithm. IL…

5.4.C Apply asymmetric encryption algorithms to encrypt and decrypt data.

- [5.4.C.1](/ek/5.4.C.1) — Common asymmetric encryption algorithms include RSA and elliptic curve cryptography (ECC). Asymm… - [5.4.C.2](/ek/5.4.C.2) — As with symmetric encryption, asymmetric encryption and decryption can be performed using the co… - [5.4.C.3](/ek/5.4.C.3) — In a CLI, a user can generate an asymmetric key pair and encrypt or decrypt files as necessary. …

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