Questions tagged [cipher]
The cipher tag has no usage guidance.
19
questions
27
votes
1
answer
22k
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How to wipe unallocated disk space in Windows
Due to the nature of how filesystems like NTFS work, files that are deleted "permanently" from within Windows aren't immediately deleted - they're simply marked as deleted from the Master File Table (...
7
votes
3
answers
11k
views
Can Windows 7 cipher.exe securely wipe USB drive?
Using the command line tool cipher.exe built into Windows 7, can it be used to securely wipe a USB attached drive?
- 310
1
vote
1
answer
303
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How to disable CBC ciphers in Firefox
The ssllabs.com browser check shows a list of cipher suites supported by my browser. Some are labeled as WEAK, I think because they do not support perfect forward secrecy.
I can disable some of them ...
- 8,487
0
votes
2
answers
676
views
Why is folder efstmpwp located in C drive even when I am ciphering D drive in Window 8?
I am trying to wipe all the deleted data out of my laptop using cipher command on Window 8. When I use cipher /w:C, the folder efstmpwp is created in C drive, which supports the cipher process. But ...
- 7,370
0
votes
1
answer
4k
views
How to include key exchange algorithms required to connect to router using OpenSSH client?
With OpenSSH_8.9p1 for Windows, I'm trying to connect to a NuCom router NC-WR764TGV:
ssh [email protected]
Output:
Unable to negotiate with 192.168.1.1 port 22: no matching key exchange method found.
...
- 466k
1
vote
2
answers
817
views
Windows 10 TLS/SSL weird issues (BAD_MAC_READ, programs queries interupted, ...)
I recently finished to assemble my new PC and installed a Windows 10 Pro from the Microsoft utilitary tool.
All went fine, but suddenly, after like a week, errors began to pop in :
On Firefox (...
- 1
0
votes
1
answer
3k
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How to check which ciphers are included in "HIGH" ciphers constant
From the documentation I found
HIGH
"High" encryption cipher suites. This currently means those with key lengths larger than 128 bits, and some cipher suites with 128-bit keys.
The ...
- 111
0
votes
1
answer
37
views
Rename files with symmetric cipher
I would like to batch obfuscate file names (not file content) with a simple symmetric cipher. So that I can rename them back afterwards. For example, using the online blowfish encryption on http://...
- 116
1
vote
0
answers
2k
views
Allow specific weak cipher in Chrome
I have to connect to a system that uses a weak TLS cipher :
TLS_RSA_WITH_AES_256_CBC_SHA.
This is an embedded web server in a physical appliance and there is no firmware available to change that ...
- 131
-1
votes
1
answer
757
views
Is it normal that running a "wipe free disk space" utility finishes quicker the more times it's used?
I used cipher /w:C to wipe the free disk space on my C drive. The first time I did it, it took say 2 days. Then two days later I used it, and it took 1.5 days. Then again I used it and it took 1 day. ...
- 71.4k
0
votes
2
answers
120
views
If a harddisk has format errors, would running disk wipe on it still wipe everything?
If a hardisk is connected via USB to Windows and I attempt to open it, Windows says it needs to be formatted before it can be used. If I ignore this message and run disk wipe on it (like the cipher ...
- 10k
0
votes
0
answers
249
views
Windows 2012R2 IIS8.5: How to change the Key Exchange being used
I have a server using:
Key Exchange: ECDHE_RSA (0xae06) 256bits
I would like to change this to :
Key Exchange: RsaKeyX 2048bits
Is this something that can be done at the server level or is this set in ...
- 1
1
vote
2
answers
400
views
Cipher + Public key - S/MIME implementation on MS Outlook
I'm trying to understand the S/MIME implementation, and maybe I'm wrong. I'm so stuck that I will try to explain ... Sign a mail works as I thought it would work.
But, I supposed that when you send a ...
2
votes
2
answers
3k
views
SFTP using Ciphers and Key Exchange
Previously I was gaining access and transferring files (SSIS execute process task) with a .txt file configured as:
option batch on
option confirm off
open sftp://Username:[email protected]:22 -...
- 22.7k
1
vote
2
answers
246
views
What's the most secure cipher for ssh that can send files at USB3 speeds? (~480Mbps)
I have a gigabit connection between my PC and my server (iperf3 tests show ~930Mbps) and I want to be able to transfer large files as fast as possible. The hard drive on the server is connected via ...
- 1,422