在计算机科学中，抹除码将一个消息由n个区块变成一个消息超过n个区块，原本的消息可以由新的消息的区块子集合所重建。

抹除码可以使用在卫星通信、可信赖多媒体广播系统、可信赖保存系统。

• UMD的抹除码投影片(英语)

In information theory, an erasure code is a forward error correction (FEC) code for the binary erasure channel, which transforms a message of k symbols into a longer message (code word) with n symbols such that the original message can be recovered from a subset of the n symbols. The fraction r = k/n is called the code rate, the fraction k’/k, where k’ denotes the number of symbols required for recovery, is called reception efficiency.