Hello

It seems that sect163k1 public keys can have two formats

First :
0000000 02 ab 2e 87 30 ca 94 4b 9b 9a 1d 84 b4 8a 1b cb
0000020 79 c5 c6 52 e9 01 91 ef 3c 19 73 da e8 af 4b a4
0000040 40 21 b8 ce 42 b1 bf af 8c ef

Second :
0000000 30 40 30 10 06 07 2a 86 48 ce 3d 02 01 06 05 2b
0000020 81 04 00 01 03 2c 00 04 05 e4 a9 b0 56 01 51 3f
0000040 28 cc a0 97 1d 42 e8 62 9b a9 fa 0d ec 05 56 2f
0000060 86 8a fe 06 ff 09 50 c6 a0 2a 30 d8 df 0b b9 f4
0000100 73 b6

The first with a key lentgh of 43 bytes which seems to be the standard,
the second used by openssl with length 64 bytes. I can't decode using
asn1parse the first format

I'm not sure but I don't think that 43 bytes is the compressed format
patented by certicom

Can anyone tell me where I can find informations on that and what is the
impact on sha1 + sect263k1 signature.

I use a development snapshot (openssl-SNAP-20080930) of openssl



Thanks for your help

Bruno Vetel



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