65 reputation
4
bio website
location Atlanta, GA
age 26
visits member for 1 year, 7 months
seen Apr 8 at 21:31

May
9
accepted Is AES really used for Top Secret stuff?
May
4
comment Is AES really used for Top Secret stuff?
Do you really think they are telling what tools they are using, especially for top secret? And GPGPU clusters bought by China or Russia, don't you think they can break AES ? Here are two questions I think interesting. I'm more the science (and crypto) guy than the conspiracy theorist/terrorist but these questions are worth asking and answering for good.
May
3
asked Is AES really used for Top Secret stuff?
Feb
26
awarded  Scholar
Feb
26
accepted Padding always the same, problem or not?
Feb
26
comment Padding always the same, problem or not?
Thank you for your answer, it solves a lot of problems. For integrity and else, I'm using a CBC-MAC with the size prepended (and a different key for encryption and MAC of course). The IV is also different for each message.
Feb
26
awarded  Student
Feb
26
comment Padding always the same, problem or not?
The smartcard does not implement any padding scheme for AES so I needed to do it myself. And the PDU on the link do not have a fixed length, it is just the maximum I can use.
Feb
26
comment Padding always the same, problem or not?
Good remark but the Java smartcard only supports CBC.
Feb
26
asked Padding always the same, problem or not?
Feb
25
awarded  Supporter
Feb
19
comment How and why can a decryption program tell me that a key is incorrect?
Exactly. Symmetric encryption is for confidentiality only, use MACs for data integrity
Jan
11
awarded  Teacher
Jan
11
answered How and why can a decryption program tell me that a key is incorrect?