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1d
reviewed Reviewed Looking for Defensive security training or content
1d
comment OWASP security for android app
The security of your application should not normally depend on hiding the IP address.
1d
reviewed Approve What makes a SQL Injection count as blind injection?
1d
comment threema opensource client secure?
So the question would then become "do the underlying libraries have known vulnerabilities on Ubuntu"? That can probably be answered with some research of your own. But you'd have to know which libraries they are. Either way, the first step would be to Google "known vulnerabilities Threema" or similar phrases. From that, you might either get the answer you're looking for, or enough knowledge to ask a more specific question.
1d
reviewed Approve Is this cascading encryption, and is my security weakened as a result?
1d
comment threema opensource client secure?
Although this is an interesting question, it may be too broad for this site. We had some discussion about this type of question a few months ago.
1d
reviewed Approve SQLMap deleted database items
1d
reviewed Approve How to protect against request intercepting and parameter-tampering?
2d
reviewed Approve Disclose to user if account exists?
2d
reviewed Reject How do major sites prevent DDoS?
2d
reviewed Reject Oracle sql injection
2d
reviewed Approve Unable to scan live hosts in a home network
Apr
26
reviewed Approve Should VPN passwords be stored in plaintext?
Apr
26
reviewed Reject How does SMS spoofing work practically?
Apr
25
reviewed Reject Android Malware Dataset
Apr
24
reviewed Approve Id theft, hacked, remote-control, data theft, phished, mirror sites
Apr
23
reviewed Approve What could a malicious website do if you don't update Adobe Flash?
Apr
23
comment My server was hacked and files have been deleted
That's blackmail. You should contact the police. As for preventing this in the future - we have a number of questions about hardening. We've got a few canonical questions on the subject too, like the one on hardening Linux servers‌​. Good luck!
Apr
22
reviewed Edit Page test on several websites
Apr
22
revised Page test on several websites
Fixed typos and grammar.