02 - spam filtering using spam mail communities
02 - spam filtering using spam mail communities
... where a mail is classified as
either legitimate, porn -spam or other -spam, and
labeling the mails mapping to the latter two
communities as spam. Communities of mails may be
as precise as ‘mails ... not-so-explicit communities that are
machine-identifiable such as ‘porn-mails bearing links
to xyz.com’ etc.
None of the current approaches classify mails to
such extents. Some cl...
04 - collaborative spam filtering using e-mail networks
... linearly with its e -mail activity level—that is,its degree
in the network.
A
B
C
D
2 e-mails (0.2)
10 e-mails (0.5)
9 e-mails (1.0)
8 e-mails (0.8)
5 e-mails (0.25)
5 e-mails (0.25) 7 e-mails (1.0)
Trust ... such collaborative spam-
filtering mechanisms can be implemented as plug-ins to
popular e -mail programs such as Microsoft Outlook.
COLLABORATIVE SPAM- FILTERING
MECHANISMS
Our s...
03 - spam filtering based on preference ranking
... emails and spam
emails specified by users, so that the ISP/end users can
deal with spam emails at filtering points. We designed
three filtering points to classify nominated emails into
spam ... "junk" email
messages. Spam can often be referred to as unsolicited
commercial e -mail or unsolicited bulk email; however,
not all unsolicited e-mails are necessarily spam...
05 - current and new developments in spam filtering
... that separate spam from non-
spam traffic. Several key workload aspects differentiate spam
traffic; including the email arrival process, email size, number
of recipients per email, and popularity ... experimental measures include spam recall (SR),
spam precision (SP), F1 and accuracy (A) (Fig. 1). Spam
recall is effectively spam accuracy. A legitimate email
classified as sp...
06 - automatic personalized spam filtering through significant word modeling
...
-spam_ score = ∑ W
Si
(sum is over all significant spam
words in e -mail)
-nonspam_score = ∑ W
Ni
(sum is over all significant non-
spam words in e -mail)
-If (s * spam_ score > nonspam_score) ... the spam and non -spam e-mails. This
statistical model of words can then be used to classify a
given e -mail by computing its spam score and non -spam
score values, wher...
14 - improving web spam classifiers using link structure
... 2.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
%
0
-1 0
%
1
0-2
0
%
2
0-3
0
%
3
0-4
0
%
4
0-5
0
%
5
0-6
0
%
6
0-7
0
%
7
0-8
0
%
8
0-9
0
%
9
0-1
0
0%
1
00%
spam
non -spam
Figure 2: In-link spam distribution for spam and non-
spam sites.
Outgoing ... may
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
0
-1 0
%
1
0-2
0
%
2
0-3
0
%
3
0-4
0
%
4
0-5
0...
Báo cáo khoa học: "The Contribution of Stylistic Information to Content-based Mobile Spam Filtering" potx
... varies
between spam and non -spam messages. For in-
stance, non-spammers often use special characters
to create emoticons to express their mood, such as
“ :-) ” (smiling) or “T T” (crying), whereas spam-
mers ... 2005).
2.3 Part-of-speech n-grams: POS
Following the work of Argamon-Engelson et al.
(1998), Koppel et al. (2003), Santini (2004) and
Gamon (2004), we extract part-of-speech n...
Báo cáo khoa học: "A Comparison of Event Models for Naive Bayes Anti-Spam E-Mail Filtering" potx
... corpus
1
1
1
100
99
Ling -Spam corpus
85 —
if-MI
- - - -
tftf-MI
Multi-variate Bernoulli
80
—
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
Number of attributes
Figure 2:
Spam recall ... text classifier in the context of
anti- spam E -mail filtering, using two
different statistical event models: a mul-
ti-variate Bernoulli model and a multi-
nom...
Spam mail chứng thực và mã hóa
... RSA, Diffie-Hellman và DSS
Mã hóa đối xứng CAST-128, IDEA và 3DES
Hàm băm SHA-1
5
PGP: (Pretty Good Privacy)
Hoạt động xác thực của PGP:
Người gửi tạo mẩu tin.
Sử dụng SHA-1 để sinh hash ... CA
12
S/MIME
13
Demo
14
Thank you !
15
Chứng Thực và Mã Hóa
Bảo mật email dựa trên cơ sở mã hóa. Có 2 phương pháp bảo mật cho
email:
Chứng thực.
Mã hóa.
2
PGP: (Pretty Good Privacy)
PGP (Pr...
Bảo mật mail và Spam Mail
... AntiSPAM
eWall
GFi Mail Essential and Mail Security
Barracuda Spam Firewall 300
16
GFi MailEssentail
17
Chức năng GFi MailEssentail
18
Chống Spam bằng cơ chế Bayesian
Ngăn chặn Spam ... Tổng Quan
Spam mail hay còn gọi là thư rác là
các thư quảng cáo, giới thiệu hoặc
do virus mà người nhận không
mong đợi.
Spam mail làm tràn ngập hộp thư
người dùng với những e...
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