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SubjectAnnounce loop-AES-v1.4d file/swap crypto package
[linux-kernel also CC'd due to recent encrypted swap discussion]

In short: If file and swap crypto is all you need, this package is a hassle
free replacement for international crypto patch and HVR's crypto-api.

This package provides loadable Linux kernel module (loop.o) that has AES
cipher built-in. The AES cipher can be used to encrypt local file systems
and disk partitions. For more information about compiling and using the
driver, see the README file in the package.

- GPL license.
- No source modifications to kernel. No patch hassles when you are upgrading
your kernel.
- Works with all recent 2.4, 2.2 and 2.0 kernels, including distro vendor
kernels. Encrypted disk images are compatible across all supported
- AES cipher is used in CBC mode. Supports 128, 192 and 256 bit keys.
- Passwords hashed with SHA-256, SHA-384 or SHA-512.
- 512 byte based IV. IV is immune to variations in transfer size and does
not depend on file system block size.
- Device backed (partition backed) loop is capable of encrypting swap on 2.4

Changes since previous release:
- Little speed optimization in aes-glue.c
- External encryption module locking bug is fixed (kernel 2.4 only). This
bug did not affect loop-AES operation at all. This fix is from Ingo
- On 2.4 kernels, device backed loop maintains private pre-allocated pool of
RAM pages that are used when kernel is totally out of free RAM. This
change also fixes stock loop.c sin of sleeping in make_request_fn().

Kernel 2.4 users who want to encrypt swap partitions should upgrade to this
version. No need to upgrade if you use older 2.2 or 2.0 kernels.

bzip2 compressed tarball is here:
md5sum 404f82796bacc479deb266f13ec260b8

PGP signature file, my public key, and fingerprint here:
1024/3A220F51 5B 4B F9 BB D3 3F 52 E9 DB 1D EB E3 24 0E A9 DD

Jari Ruusu <>

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