aespipe - 2.4d-1.1+b1 main

aespipe is an encryption tool that reads from standard input and
writes to standard output. It uses the AES (Rijndael) cipher.
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aespipe can be used for non-destructive in-place encryption
of existing disk partitions for use with the loop-AES encrypted
loopback kernel module.
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It can also be used as an encryption filter to create and restore
encrypted tar/cpio backup archives and to read/write and convert
loop-AES compatible encrypted images.
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Note that aespipe does not store any length information with the
encrypted images, so it cannot be used as general purpose filter
for encryption, but only for certain formats like tar.