As we know the Data encryption standard (DES) uses 56 bit key to encrypt any plain text which can be easily be cracked by using modern technologies. To prevent this from happening double DES and triple DES were introduced which are much more secured than the original DES because it uses 112 and 168 bit keys respectively. They offer much more security than DES.
3des Cracked In 22 Hours In 28
Further concerns about the widespread usage of the weak 3DES encryption algorithm include an interesting correlation of a large number of apparently less secure public facing servers accepting the weak 3DES algorithm cipher suite that happen to be located near important U.S. Cities having presumed nuclear launch and defense capabilities. Specifically, SSH servers using 3DES are of concern, since SSH, also known as secure shell, can allow for a bad guy in North Korea to login to remote server as root, if the cryptographic keys are cracked. Scary stuff in my opinion, but for this article, I will try to keep the focus on financial institutions.
The default ciphers in your Mac SSH client are not the entire list of ciphers supported. 'ssh -Q ciphers' will list available ciphers on your Mac. Add \"Ciphers +3des-cbc\" (or any cipher you have in common) to /.ssh/config (or /etc/ssh/ssh_config) and it will work.
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The processor can decrypt any key derived from its super secret, but it is impossible (such is the claim) to go from a transaction key back to the pinpad key or the pinpad key back to the super secret. Hence the maximum risk from intercepted pin blocks is a single compromised pin for each key cracked. In the event a pinpad itself is compromised, the maximum risk is any pin entered into that individual pinpad.
[root@informatica02 ssh]# ssh DCI+kdonlan@informatica02DCI+kdonlan@informatica02's password:Connection closed by ::1[root@informatica02 ssh]# ssh -vvv DCI+kdonlan@informatica02OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010debug1: Reading configuration data /etc/ssh/ssh_configdebug1: Applying options for *debug2: ssh_connect: needpriv 0debug1: Connecting to informatica02 [::1] port 22.debug1: Connection established.debug1: permanently_set_uid: 0/0debug1: identity file /root/.ssh/identity type -1debug1: identity file /root/.ssh/id_rsa type -1debug1: identity file /root/.ssh/id_dsa type -1debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3debug1: match: OpenSSH_5.3 pat OpenSSH*debug1: Enabling compatibility mode for protocol 2.0debug1: Local version string SSH-2.0-OpenSSH_5.3debug2: fd 3 setting O_NONBLOCKdebug1: SSH2_MSG_KEXINIT sentdebug3: Wrote 792 bytes for a total of 813debug1: SSH2_MSG_KEXINIT receiveddebug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1debug2: kex_parse_kexinit: ssh-rsa,ssh-dssdebug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.sedebug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.sedebug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: none,zlib@openssh.com,zlibdebug2: kex_parse_kexinit: none,zlib@openssh.com,zlibdebug2: kex_parse_kexinit:debug2: kex_parse_kexinit:debug2: kex_parse_kexinit: first_kex_follows 0debug2: kex_parse_kexinit: reserved 0debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1debug2: kex_parse_kexinit: ssh-rsa,ssh-dssdebug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.sedebug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.sedebug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: none,zlib@openssh.comdebug2: kex_parse_kexinit: none,zlib@openssh.comdebug2: kex_parse_kexinit:debug2: kex_parse_kexinit:debug2: kex_parse_kexinit: first_kex_follows 0debug2: kex_parse_kexinit: reserved 0debug2: mac_setup: found hmac-md5debug1: kex: server->client aes128-ctr hmac-md5 nonedebug2: mac_setup: found hmac-md5debug1: kex: client->server aes128-ctr hmac-md5 nonedebug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024
Sep 2 12:01:08 informatica02 sshd[2834]: debug3: fd 5 is not O_NONBLOCKSep 2 12:01:08 informatica02 sshd[2834]: debug1: Forked child 2850.Sep 2 12:01:08 informatica02 sshd[2834]: debug3: send_rexec_state: entering fd = 8 config len 623Sep 2 12:01:08 informatica02 sshd[2834]: debug3: ssh_msg_send: type 0Sep 2 12:01:08 informatica02 sshd[2834]: debug3: send_rexec_state: doneSep 2 12:01:08 informatica02 sshd[2850]: debug3: oom_adjust_restoreSep 2 12:01:08 informatica02 sshd[2850]: Set /proc/self/oom_score_adj to 0Sep 2 12:01:08 informatica02 sshd[2850]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8Sep 2 12:01:08 informatica02 sshd[2850]: debug1: inetd sockets after dupping: 3, 3Sep 2 12:01:08 informatica02 sshd[2850]: Connection from ::1 port 62327Sep 2 12:01:08 informatica02 sshd[2850]: debug1: Client protocol version 2.0; client software version OpenSSH_5.3Sep 2 12:01:08 informatica02 sshd[2850]: debug1: match: OpenSSH_5.3 pat OpenSSH*Sep 2 12:01:08 informatica02 sshd[2850]: debug1: Enabling compatibility mode for protocol 2.0Sep 2 12:01:08 informatica02 sshd[2850]: debug1: Local version string SSH-2.0-OpenSSH_5.3Sep 2 12:01:08 informatica02 sshd[2850]: debug2: fd 3 setting O_NONBLOCKSep 2 12:01:08 informatica02 sshd[2850]: debug2: Network child is on pid 2851Sep 2 12:01:08 informatica02 sshd[2850]: debug3: preauth child monitor startedSep 2 12:01:08 informatica02 sshd[2850]: debug3: mm_request_receive enteringSep 2 12:01:08 informatica02 sshd[2851]: debug3: privsep user:group 74:74Sep 2 12:01:08 informatica02 sshd[2851]: debug1: permanently_set_uid: 74/74Sep 2 12:01:08 informatica02 sshd[2851]: debug1: list_hostkey_types: ssh-rsa,ssh-dssSep 2 12:01:08 informatica02 sshd[2851]: debug1: SSH2_MSG_KEXINIT sentSep 2 12:01:08 informatica02 sshd[2851]: debug3: Wrote 784 bytes for a total of 805Sep 2 12:01:08 informatica02 sshd[2851]: debug1: SSH2_MSG_KEXINIT receivedSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: ssh-rsa,ssh-dssSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.seSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.seSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: none,zlib@openssh.comSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: none,zlib@openssh.comSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit:Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit:Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: first_kex_follows 0Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: reserved 0Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1Sep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: ssh-rsa,ssh-dssSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.seSep 2 12:01:08 informatica02 sshd[2851]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cb