From: Daniel Kahn Gillmor Date: Thu, 7 Sep 2017 19:04:00 -0400 Subject: gpg: default to AES-256. * g10/main.h (DEFAULT_CIPHER_ALGO): Prefer AES256 by default. -- It's 2017, and pretty much everyone has AES-256 available. Symmetric crypto is also rarely the bottleneck (asymmetric crypto is much more expensive). AES-256 provides some level of protection against large-scale decryption efforts, and longer key lengths provide a hedge against unforseen cryptanalysis. Signed-off-by: Daniel Kahn Gillmor (cherry picked from commit 73ff075204df09db5248170a049f06498cdbb7aa) --- g10/main.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/g10/main.h b/g10/main.h index 273ddaa..d1a54db 100644 --- a/g10/main.h +++ b/g10/main.h @@ -31,7 +31,9 @@ (i.e. uncompressed) rather than 1 (zip). However, the real world issues of speed and size come into play here. */ -#if GPG_USE_AES128 +#if GPG_USE_AES256 +# define DEFAULT_CIPHER_ALGO CIPHER_ALGO_AES256 +#elif GPG_USE_AES128 # define DEFAULT_CIPHER_ALGO CIPHER_ALGO_AES #elif GPG_USE_CAST5 # define DEFAULT_CIPHER_ALGO CIPHER_ALGO_CAST5