Editing GNUnet (section)

=== File encoding ===
Files shared with GNUnet are ECRS (Encoding for Censorship-Resistant Sharing) coded.{{sfn|BennettGrothoffHorozovPatrascu|2002}}

All content is represented as GBlocks. Each GBlock contains 1024 bytes. There are several types of GBlocks, each of them serves a particular purpose. Any GBlock <math>B</math> is uniquely identified by its [[RIPEMD#RIPEMD-160 hashes|RIPEMD-160 hash]] <math>H(B)</math>.

DBlocks store actual file contents and nothing else. File is split at 1024 byte boundaries and resulting chunks are stored in DBlocks. DBlocks are linked together into [[Merkle tree]] by means of IBlocks that store DBlock identifiers.

Blocks are encrypted with a symmetric key derived from <math>H(B)</math> when they are stored in the network.