Question about security issues regarding 'cp' and 'mv'

Ok, I wondered about how 'cp' and 'mv' are really working. I have some guesses but I need these things to be confirmed.
Here is what I have:
A partition with a unix file system, say ext2 or 3 (does this make a difference here?) containing *very* sensitive data. The filesystem is encrypted (whirlpool/serpent) but that shouldn't matter. As I do not want corpses of dead files lying around that could be recovered, I always use 'shred -zu' with 26 passes to overwrite and then delete the data.
And that's where I have my conceirns:
If I want to rename a file or move it to another folder on the same partition. Is it save to 'mv' it? Or should I 'cp' it and then 'shred' the original file. I assume that 'mv' will not touch the actual file and just tell the file system of it's new name or place in the folder-structure. Given that, shredding a 'mv'ed file should not leave a trace of it on the drive (except of the old filename before the 'mv' maybe, but that wouldn't be too critical). I assume that, because it's the only thing that would make sense to me, but have to know it for sure!
However, on moving the file to another drive I should probably 'cp' it, then 'shred' the original file. The question I have here is as follows:
How much information which could be recovered leaves 'cp'ing in my RAM? Will I have to find a way to somehow shred the information in the RAM or can I assume that my RAM get's rewritten often enough, that most traces will be gone, say, in a couple of days?
If you have links at hand to confirm your answer, please post them, too.

Okay, thanks for that, I will have a closer look on flushing the ram.
Sure, I care about security and privacy, but -- as you might expect -- the data I have are not really THAT sensitive/confidential/whatsoever. I've just gotten into it somehow and now I'm just curious/intrested in improving it for it's own sake more or less.

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Question about security issue when transferring files from PC

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Be sure to scan all your files for viruses before moving them from the PC to the Mac. Although PC viruses should have no effect on a Mac, it's still possible to pass on a virus to a friend via email.
Do You Need Anti-Virus Protection for Your Mac?
According to Rich Mogull's article, Should Mac Users Run Antivirus Software?,
"The reality is that today the Mac platform is relatively safe. There are hundreds of thousands of viruses and other malicious software programs floating around for Windows, but less than 200 are known to target the Mac, and many of those are aimed at versions of the Mac OS prior to Mac OS X (and thus have no effect on a modern Mac).
It's not that Mac OS X is inherently more secure against viruses than current versions of Windows (although it was clearly more secure than Windows prior to XP SP2); the numerous vulnerabilities reported and patched in recent years are just as exploitable as their Windows equivalents. But most security experts agree that malicious software these days is driven by financial incentives, and it's far more profitable to target the most dominant platform."
Mr. Mogull is a computer security expert. I recommend reading the entire article as it is quite informative.
For additional information on viruses, trojans, and spyware visit The XLab FAQs and read the FAQs on viruses and spyware.

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Here's a very basic question about 2 TB external drives and Time Machine.

Here's a very basic question about 2 TB external drives and Time Machine.
Ihave a Mac Pro with a .75 TB and 1 TB drive. It also has a 1 TB 2ndinternal drive. My current external drive is too small so I'll begetting a 1.5 TB or 2 TB drive.
Obviouslythe new larger 2 TB drive will backup everything on the Mac Prointernal drive with Time Machine. But there will be 1 TB of space leftover going to waste.
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Thanks for any insights.
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The problem with terabyte drives is that that a 3 TB is about as big as you can get without going into RAID territory. Ideally, a Time Machine drive should be 3 times as large as all the drives you are backing up. So, if you have 2.75 TB of internal storage, you should have 8 TB of Time Machine space.
Of course, that is "should". If your TB drives are mostly empty, then you can get away with something 3 times the size of your used disk space. Just remember that you are pushing it. Linc is right about Time Machine needing space to work.
It is unlikely that you have regular churn on 2.75 TB of disk. I suggest identifying which drives and folders have the most activity and excluding those drives and directories that don't change much. It would be better to archive the data that doesn't change often and keep it out of Time Machine. Then you may be able to get away with a 2 TB Time Machine drive.

Question about 2 TB external drives and Time Machine.

Here's a very basic question about 2 TB external drives and Time Machine.
I have a Mac Pro with a .75 TB and 1 TB drive. It also has a 1 TB 2nd internal drive. My current external drive is too small so I'll be getting a 1.5 TB or 2 TB drive.
Obviously the new larger 2 TB drive will backup everything on the Mac Pro internal drive with Time Machine. But there will be 1 TB of space left over going to waste.
Should I partition the external drive so that the TM portion will be 1 TB and the use the remaining extra partition for additional file backups with Carbon Copy?
Thanks for any insights.
I tried searching around on the new Apple discussion forum, but I find it much harder to use than the old forum I used to use.

John,
I'm not sure why you posted in the iMac forum so I'm going to attempt to get you to the correct spot. I would recommend reposting in the Time Machine Forum, this is part of the OS X forums (Leopard or Snow Leopard) because you are using Snow Leopard (your profile indicates you are) please click Apple Support Communities and type Snow Leopard. Then you can narrow the search down by clicking Refine this List.
Roger

Security Issue - LDAP Authentication and supply of empty passwords

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Notes:
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Question about TC setup, bridge mode and security...

Hello All
I need some help...
Have bought a 1 Tb TC to use with my existing ethernet/wireless all-Mac home network but have some specific queries.
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iMac G5
Powerbook G4
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Before buying the TC, I used a spare Airport Express basestation in its place to act as the 'main' basestation and the IP addresses of each device on the network were 10.0.0.1, 2, 3, etc. I had the impression that my home network was not "seen" by the outside world as a consequence of this.
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Section 4, here are my thoughts.
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Question about forum use regarding an error I am receiving

I am looking for an answer to the proper process I should follow when running into issues with Azure Storage. As I don't want to annoy folks with tossing questions into this forum regarding errors I'm running into that are more usage related instead
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Hi all,
I have to implement SAP on a Indian company and I'm verifying all particularity about this country (in particular tax procedures and the great number of differents tax conditions used).
I have two questions about tax procedures and pricing schemas. Every feedback about thse points will be appreciated.
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I have read lot of documentation about CIN implementation and Iu2019m oriented to choose TAXINN schema, but If possible I would to understand better which are on behalf of one choice or another.
b) To define pricing schemas for India, after check with local users and using examples of documents (in particular tax invoice) actually produced, I have understood that taxes have to be applied on amount defined starting from price list, minus discounts recognized to customer plus surcharges eventually to bill (packing, transport, etc.).
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hi,
this is to inform you that,
a) About point 1 I know the difference between the 2 tax procedures (conditions or formulas). I also have read in others post in the FORUM that TAXINN is preferable. So I would to understand which are the advantages to choose instead TAXINJ. There are particular reasons or it'a only an alternative customizing setting?
a.a. for give for posting the link : plese give me the advantages of TAXINJ and TAXINN
CIN - TAXINN and TAXINJ
b) About point 2, to define which value has to be used as base amount to calculate taxes isn't a choice, but is defined depending by fiscal requirement of the country, in this case India fiscal requirement. I know that, as Lakshmipathi
write as answer on my question, exception could be, but it was important for me to understand if I have understood correctly the sequence of the pricing condition in the schema in "normal" situation.
b.b. you can create your own pricing procedure for this and go ahead.
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balajia

A few question about iPhone OS in CS5 and CS5 in general.

Hi,
I'm an IT trainer and I am trying to introduce my students to programming for iPhone/iPod Touch. (They are Secondary 2 students. 14 years old) The school is using a windows computer and CS5 right now is the best for the class (Not a steep learning curve and a user-friendly program). I know about the problems over the iPhone OS in CS5 with Apple but I was told it is still available for use. Furthermore, we have no intention of bringing the apps created to the Apple Store. I've tried the trial version and before I make any purchase, I would actually like to ask a few questions.
Is the iPhone OS in the trial version itself complete? Is there anything left out from the trial version because when I tried it, it seems fine however I did not try publishing to an iPhone due to the certificates. Is there a reason for the certificate? Is there any way around it because if there isn't do I need to get a certificate for every single student? (I'm looking at a class of 40 students.) Is the certificate available for windows platform?
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Dear Marco,
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WARNING: largefiles option is not present on mount of /, files may be limited to 2GB in size.
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bash-3.00$ ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
open files (-n) 256
pipe size (512 bytes, -p) 10
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 29995
virtual memory (kbytes, -v) unlimited
In UFS file system I have noted, for such largefile option we are adding the "largefile" parameter in mount, below is such an example.
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Some questions about javacard 2.1.1 and smartcardio

Hello i have some question about java card 2.1.1 and the smartcardio package.
1.) I want to sign a message with the Signature.ALG_RSA_SHA_PKCS1 algorithm. I use the following code in the applet to sign the message:
final static byte P1_CREATION_MODE = (byte) 0x01;
final static byte INS_SIGN_MODE = (byte) 0x60;
final static byte SmartCard_CLA = (byte) 0xB0;
private void signMessage(APDU apdu) {
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if (TerminalFactory.getDefault().terminals().list().size() == 0) {
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javax.smartcardio.CardException: sun.security.smartcardio.PCSCException: Unknown error 0x8010002f
        at sun.security.smartcardio.ChannelImpl.doTransmit(ChannelImpl.java:202)
        at sun.security.smartcardio.ChannelImpl.transmit(ChannelImpl.java:73)
        at de.upb.client.smartmeter.SmartMeter.initSmartCardApplet(SmartMeter.java:114)
        at de.upb.client.smartmeter.SmartMeterApplikation.main(SmartMeterApplikation.java:39)
Caused by: sun.security.smartcardio.PCSCException: Unknown error 0x8010002f
        at sun.security.smartcardio.PCSC.SCardTransmit(Native Method)
        at sun.security.smartcardio.ChannelImpl.doTransmit(ChannelImpl.java:171)
        ... 3 more2.) 3Des encryption
I want to use the 3Des algorithm to encrypt my data. I use
keyDES = (DESKey) KeyBuilder.buildKey(KeyBuilder.TYPE_DES,
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cipherDES = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M2, false);But i do not know what is the aquivalent on the host side??
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new CommandAPDU((byte) 0xb0, (byte) 0x20, (byte) 0x01, (byte) 0x00, modulus.toByteArray()); // create the apdu
// the method in the applet
private void setServerKeyMod(APDU apdu) {
        byte[] buffer = apdu.getBuffer();
        try {
            byte byteRead = (byte) (apdu.setIncomingAndReceive());
            short off = ISO7816.OFFSET_CDATA;
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CommandAPDU((byte) 0xb0, (byte) 0x60, (byte) 0x01, (byte) 0x00, data, (byte) 0xff);
java.lang.IllegalArgumentException: ne must not be negative
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        at javax.smartcardio.CommandAPDU.<init>(CommandAPDU.java:252)I thought that it this should be possible in order to use all the bytes of the response apdu.
If you need more code to help please let me know.
Cheers
Edited by: 858145 on 06.07.2011 08:23

2) What is PKCS? what is the difference between
PKCS#11 and PKCS#15??PKCS is the abbreviation of "Public-Key Cryptography Standards"
PKCS #11: Cryptographic Token Interface Standard
See http://www.rsasecurity.com/rsalabs/node.asp?id=2133
PKCS #15: Cryptographic Token Information Format Standard
http://www.rsasecurity.com/rsalabs/node.asp?id=2141
If you want to use yor smartcard as secure token it doesn't have to be a JavaCard.
BTW: I don't remember a way to access PKCS#15 tokens on a JavaCard from within an oncard JavaCard program. If you want to use keys in your oncard program, you have to transfer it onto the card or generate it oncard and export the public key by your own oncard/offcard code.
Jan

SSRS (Security) issues in Firefox and Chrome

in both browsers the layout is a mess to start with.
Biggest problem in both cases is: The detailView button is vissible even if your not admin.
So when ppl click this they are able to see/modify datacources and see hidden directories and stuff. I havent checked if they can really change stuff but it seems to me that its not what we want. If you are not admin you shouldnt see the DetailView button
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the security issue with the DetailView option available for everyone would be a major problem id say

Which version of Reporting Services are you running?
Check this article on MSDN about browser compatibility of SSRS: Planning for Reporting Services and Power View Browser Support
SSRS works best on Internet Explorer. If you use other browsers, something may not be displayed correctly.

Just a question about security

Hi All.
Just a simple question really, I read on one of the forums here a question about running windows and apples mac os at the same time.
My question is: would they not cause conflict, as with apple you don't need to install security but windows is riddled with bugs and virus's surely one would infect the other?
Sorry to sound so silly, I'm not very computer savvy , but it strikes me as wrong somehow.
Thanks Tricia

You will have whatever threats assail Windows and must protect against those, but none of them will cross over to the Mac side. Note: there is cross platform Windows/Mac malware, i.e. malware written for both. But to be infected you need to be infected directly on the Mac side.
http://www.zdnet.com/blog/bott/the-slow-and-steady-evolution-of-cross-platform-m alware/4930

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Hi, dear,
I'm a new bie of BIEE. In these days, have a look about BIEE architecture and the BIEE components. In the next project, there are some work about BIEE development based on EBS application. I have some questions about the integration :
1) generally, is the BIEE database and application server decentralized with EBS database and application? Both BIEE 10g and 11g version can be integrated with EBS R12?
2) In BIEE administrator tool, the first step is to create physical tables. if the source appliation is EBS, is it still needed to create the physical tables?
3) if the physical tables creation is needed, how to complete the data transfer from the EBS source tables to BIEE physical tables? which ETL tool is prefer for most developers? warehouse builder or Oracle Data Integration?
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Thanks in advance.

1) generally, is the BIEE database and application server decentralized with EBS database and application? Both BIEE 10g and 11g version can be integrated with EBS R12?You, shud consider OBI Application here which uses OBIEE as a reporting tool with different pre-built modules. Both 10g & 11g comes with different versions of BI apps which supports sources like Siebel CRM, EBS, Peoplesoft, JD Edwards etc..
2) In BIEE administrator tool, the first step is to create physical tables. if the source appliation is EBS, is it still needed to create the physical tables?Its independent of any soure. This is OBIEE modeling to create RPD with all the layers. If you build it from scratch then you will require to create all the layers else if BI Apps is used then you will get pre-built RPD along with other pre-built components.
3) if the physical tables creation is needed, how to complete the data transfer from the EBS source tables to BIEE physical tables? which ETL tool is prefer for most developers? warehouse builder or Oracle Data Integration?BI apps comes with pre-built ETL mapping to use with the tools majorly with Informatica. Only BI Apps 7.9.5.2 comes with ODI but oracle has plans to have only ODI for any further releases.
4) During data transfer phase, if there are many many large volume data needs to transfer, how to keep the completeness? for example, it needs to transfer 1 million rows from source database to BIEE physical tables, when 50%is completed, the users try to open the BIEE report, can they see the new 50% data on the reports? is there some transaction control in ETL phase?User will still see old data because its good to turn on Cache and purge it after every load.
Refer..http://www.oracle.com/us/solutions/ent-performance-bi/bi-applications-066544.html
and many more docs on google
Hope this helps

Question about security issues regarding 'cp' and 'mv'

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