> For the complete documentation index, see [llms.txt](https://derek-johnson-1.gitbook.io/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://derek-johnson-1.gitbook.io/welcome/freshman/security-250/week-6/mid-term-notes.md). # Mid Term Notes CIA - Confidentiality who can access the data, integrity is the data what it's supposed to be, accessability can you access the data. AAA - Authentication authorization, accounting/auditing Access Control - Forms of encryption Asymmetric vs symmetric Both encryption methods use keys to encrypt and decrypt data. The main difference is that symmetric encryption uses the same key to encrypt and decrypt data. In contrast, asymmetric encryption uses a pair of keys – a public key to encrypt data and a private key to decrypt information. ECV Types of hashing Sha1 - da39a3ee5e6b4b0d3255bfef95601890afd80709 - 40 character sha256- 252F10C83610EBCA1A059C0BAE8255EBA2F95BE4D1D7BCFA89D7248A82D9F111 - 64 character sha 512 - 128 characters ETC pkt