This recommendation defines five confidentiality modes of operation for use with an underlying symmetric key block cipher algorithm: Electronic Codebook (ECB), Cipher Block Chaining (CBC), Cipher Feedback (CFB), Output Feedback (OFB), and Counter (CTR). Used with an underlying block cipher algorithm that is approved in a Federal Information Processing Standard (FIPS), these modes can provide cryptographic protection for sensitive, but unclassified, computer data.
Citation: Special Publication (NIST SP) - 800-38A
NIST Pub Series: Special Publication (NIST SP)
Pub Type: NIST Pubs
block cipher, cryptography, encryption, mode of operation