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Go语言加密算法实践 Practical Cryptography With Go（英文版）.pdf

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Go语言开发区块链的基础， Go语言加密算法实践 Practical Cryptography With Go（英文版）

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2018/4/19 Read Practical Cryptography With Go |  Leanpub
https://leanpub.com/gocrypto/read#leanpub-auto-select-bibliography 1/67
Practical Cryptography With
Go
Practical Cryptography With Go
Buy on Leanpub
Table of Contents
Chapter 1: Introduction
Chapter 2: Engineering concerns and platform
security
Basic security
Specifications
On errors
Input sanitisation
Memory
Randomness
Time
Side channels
Privacy and anonymity
Trusted computing
Virtual environments
Public key infrastructure


0

2018/4/19 Read Practical Cryptography With Go |  Leanpub
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What cryptography does not provide
Data lifetimes
Options, knobs, and dials
Compatibility
Conclusion
Further reading
Chapter 3: Symmetric Security
Indistinguishability
Authenticity and integrity
NaCl
AES-GCM
AES-CTR with HMAC
AES-CBC
Messages v. streams
Conclusions
Further reading
Chapter 4: Secure Channels and Key Exchange
Secure channel
Password-based key derivation
Asymmetric key exchange: ECDH
NIST curves
Other key exchange methods
Practical: File encryptor
Further reading
Chapter 5: Digital signatures
Cryptographic hashing algorithms
Forward secrecy

2018/4/19 Read Practical Cryptography With Go | Leanpub

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Chapter 1: Introduction

This is a book about cryptography: how to communicate

securely. There are several objectives that cryptography aims

to solve:

confidentiality

integrity

, and

authenticity

. It

also helps solve some other problems that come up in secure

communications, but it’s important to remember that it isn’t

a complete solution to security problems. In this book, we’ll

look at how to build secure systems; some of the problems that

cryptography does not solve will also be pointed out. This

book will attempt to guide you in your attempt to understand

how to use cryptography to secure your services, and

illustrate it using the Go programming language.

As mentioned, the foundation of cryptographic security are the

three goals of confidentiality, integrity, and authenticity.

Confidentiality is the requirement that only the intended

party can read a given message; integrity is the requirement

that a message’s contents cannot be tampered with; and

authenticity is the requirement that the

provenance

(or

origin) of a message can be trusted. Trust will play a large

Ed25519

ECDSA

RSA

Conclusions

Practical: Sessions with identities

Further reading

Appendix: Crypto Review of Chapters

2018/4/19 Read Practical Cryptography With Go | Leanpub

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role in our secure systems, but there is no single solution to

the problem. It will present many challenges in building

secure systems. A cryptographic algorithm applies some

transformations to data in order to achieve these goals, and

various algorithms are applied to achieve different goals.

In order to discuss cryptography, a baseline vocabulary is

needed. The following terms have specific meanings:

The

plaintext

is the original message.

The

ciphertext

is traditionally a message that has been

transformed to provide confidentiality.

cipher

is a cryptographic transformation that is used to

encrypt or decrypt a message.

message authentication code

(or

MAC

) is a piece of data

that provides authenticity and integrity. A MAC algorithm

is used both to generate and validate this code.

encrypt

a message is to apply a confidentiality

transformation, but is often used to describe a

transformation that satisfies all three goals.

decrypt

a message to reverse the confidentiality

transformation, and often indicates that the other two

properties have been verified.

hash

digest algorithm

transforms some arbitrary

message into a fixed-size output, also called a digest or

hash. A cryptographic hash is such an algorithm that

satisfies some specific security goals.

peer

party

describes an entity involved in the

communication process. It might be a person or another

machine.

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A secure communication system will protect against both

passive

and

active

attacks. A passive attack is one in which

a party for whom a message is not intended is listening on the

communications. An active attack is one in which some

adversarial party is tampering with messages, and can inject,

alter, or replay messages.

Cryptography should be used to solve specific problems, such

Eavesdropping: as is the case with in-person

conversations, an attacker could listen in on traffic

going in and out, potentially stealing secrets passed back

and forth. The security goal of confidentiality will

mitigate this attack to an extent; while cryptography will

obscure the contents of the message, by itself it doesn’t

hide the fact that two parties are communicating. An

attacker might also be able to determine information based

on the size of the messages.

Tampering: traffic going in and out of the application

could be modified en-route; the system needs to make sure

that messages it receives have not been tampered with. The

integrity goal is used to ensure messages haven’t been

tampered with.

Spoofing: an attacker can pretend to be a legitimate user

by faking certain details of a message. An attacker can

use spoofing to steal sensitive information, forge

requests from a user, or take over a legitimate session.

Authentication helps to defend against this attack, by

validating the identity of users and messages.

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majinjing3

2018-07-01

网页版的直接保存为 pdf，也好意思上传？
fankyxu

2018-08-09

看了标题还是很有诱惑力的
ddxd123

2018-07-28

垃圾资源，好意思上传？

tmepri

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