I am learner of cryptographic algorithms and security standards. I usually Google it to understand the basics of the algorithm or the protocol, and to find an implementation of a protocol. However I can never be sure if the algorithm I am looking for is in its globally accepted form. The source can be either books or websites.
To explain what I want to read from the trustable sources, I can give the examples below;
About a cryptographic algorithm: AES Algorithm or AES-CBC mode algorithm ,Implementation of AES-CBC , Implementation of SHA-256
Protocol: The Transport Layer Security (TLS) Protocol Version 1.2
A security standard: PKCS - Public Key Cryptography Standards
Information security is improving and changing very fast. And I always want to keep myself updated as soon as possible. I would like to know the most recent sources. In addition, when I write an article, I would like to refer to globally accepted sources. It would not be good practice to refer an information from Wikipedia or a random website. I think that one source that I can refer is NIST. Also, I can trust to the official publication of an algorithm.
To conclude, which sources can I use without doubt while doing my research about a security standard, or algorithm?