2
votes
3answers
184 views

I want to roll my personal cloud hosted Password Manager using pass. How secure/insecure would this be?

I've come to the conclusion that I need to up my security. I currently have a dozen memorized passwords I use for every device and website. I'm against Keypass/Lastpass due to having to trust they ...
0
votes
0answers
198 views

Brute-Force/Dictionary attack against encypted file using PBKDF2 key derivation

I have been following this very useful post by Thomas. My use case is slightly different. I am developing a mobile application which requires some sensitive data to be stored on the device in a SQLite ...
1
vote
2answers
131 views

How could police identify digital contraband and charge someone if it's encrypted with keys?

For example, say I am transferring heavily-encrypted DVD/Blu-ray movies/game copies over the internet. However, I am using double or (+) encryption with keys required to decrypt the file using an ...
3
votes
1answer
167 views

File Vault 1 password from memory dump

I have a osx 10.9 machine with a File Vault1 encrypted user partition. I would like to remove the encryption, but I don't remember the "master key" which is the only way to remove encryption ...
1
vote
1answer
180 views

Retrieve RAR Password through Extracted File

So I was wondering about something, but for the simplicity, consider this example: You have a file with n encrypted files in it, of which one is called 'Note.txt' You also happen to have another ...
2
votes
2answers
164 views

Appropriate way to encrypt passwords/financial info?

I am in the process of creating a file/files containing all of my logins/password info for various accounts. In the event of my untimely demise this file would be sent to the appropriate party(s). ...
1
vote
3answers
254 views

RatticDB for passwords is not encrypted. Is this good approach?

I am looking for a password application for storing passwords, and RatticDB have a web interface and SSH access is planned, which are exactly the features I am looking for. However, they write that ...
2
votes
2answers
880 views

Explain real world symmetric key encryption

I'm new to cryptography. While reading about symmetric key encryption, it was mentioned that it requires secret key exchange so that 2 parties can decrypt the ciphertext. Now, using some encryption ...
2
votes
2answers
3k views

Can I properly make password-protected 7z archives secure?

After reading the question and answers of this and this, I left with an overall impression from the last one that zips were considered not safe and insecure way of sharing data. I still think ...
1
vote
2answers
723 views

Password Protected Zip: if attacker had one file, can use it to decrypt all files?

Consider a folder containing the following files: (file1.txt, file2.doc, file3.pdf) all zipped and password protected, if attacker had one of these file, can use it for decrypting all without knowing ...
2
votes
2answers
8k views

Excel 2007 Encryption Strength

With a strong password of 10+ characters, mixed case, etc... Is the encryption of a Excel 2007 document secure enough to create reasonably strong defense against a brute force attack? What encryption ...
2
votes
1answer
2k views

What algorithm/encryption type does Gmail use for security?

In the wake of the recent database hacks, i.e. Sony, Gawker, etc.. where the hackers have access to the hashed usernames and passwords, i've been more keen in paying attention to the sites and ...
22
votes
5answers
2k views

Do spaces in a passphrase really add any more security/entropy?

I often see passphrase suggestions written as a sentence, with spaces. In that format are they more susceptible to a dictionary attack because each word is on it's own as opposed to a large unbroken ...
10
votes
5answers
511 views

Security of using passwords or even passphrases to encrypt files

Is it ever appropriate to use real-world passwords to encrypt files to be sent via unsecure means. By real world, I mean a password that is memorable and memorisable by a mere person? I am implying ...
8
votes
3answers
1k views

time to crack file-encryption password - more than just iteration

I have often seen that takes x amount of time to crack a certain length password. But this just seems to be the amount of time it takes to iterate through all the possibilities. What about the time it ...