BestCrypt creates and supports encrypted virtual disks, which are visible as regular disks with corresponding drive letters (for example, D:, K:, Z:, i.e. with any drive letter that is not used by another system device). BestCrypt allows encrypting data with many encryption algorithms (AES, Blowfish, Twofish, CAST and others). Every algorithm is implemented with the largest possible key size defined in the algorithm's specification. BestCrypt v.8 can utilize LRW Encryption Mode, which is specially designed for applications working on disk sector level and more secure than other popular modes used earlier, like Cipher Block Chaining (CBC) mode.